Re: [Rails] Re: Use of :include option in find query

[Robby Russell]

The queries will likely be the same.. but you should check to see if
it loaded the company details _before_ you called @user.company.

You might try the following from script/console while tailing the log
file in another terminal.

ruby script/console
=  User.find(2)

... check the log/development.log

= User.find(2, :include = :company)

 check log/development.log

Good luck!

Cheers,
Robby



On Tue, Aug 10, 2010 at 10:21 PM, Mike Disuza li...@ruby-forum.com wrote:
 Hi I have written code like this

 1) Without :include
 My code is :-
 def user_details
   �...@user=user.find(params[:id])
   �...@company=@user.company
 end
 Log Output:-

 Processing UsersController#user_details (for 127.0.0.1 at 2010-08-11
 10:51:34) [GET]
  Parameters: {id=2}
  User Columns (1.0ms)   SHOW FIELDS FROM `users`
  User Load (0.4ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)
  Company Load (0.4ms)   SELECT * FROM `companies` WHERE
 (`companies`.user_id = 2) LIMIT 1
 Rendering template within layouts/users
 Rendering users/user_details
 Completed in 65ms (View: 48, DB: 2) | 200 OK
 [http://localhost/user_xml?id=2]

 2) With Include:-
  def user_details
   �...@user=user.find(params[:id], :include=:company)
   �...@company=@user.company
 end
 Log Output:-
 Processing UsersController#user_details (for 127.0.0.1 at 2010-08-11
 10:53:13) [GET]
  Parameters: {id=2}
  User Columns (1.2ms)   SHOW FIELDS FROM `users`
  User Load (0.5ms)   SELECT * FROM `users` WHERE (`users`.`id` = 2)
  Company Load (0.3ms)   SELECT * FROM `companies` WHERE
 (`companies`.user_id = 2) LIMIT 1
 Rendering template within layouts/users
 Rendering users/user_details
 Completed in 13ms (View: 2, DB: 2) | 200 OK
 [http://localhost/user_xml?id=2]

 If you look at the both o/p there is a query on company table in both
 the cases.

 What is the difference?

 Thanks,
 Mike
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[Rails] Re: Help on Route

[Anubhaw Prakash]

Tony Yin wrote:
 Anubhaw Prakash wrote:

 Try this,
 
 map.resources :controller_name, :collection = { :method_name = :get }
 
 Thanks,
 Anubhaw
 
 hi Anubhaw, thanks for the reply, but that did not work. When I put that 
 in
 my routes.rb, I lost home index; but I can view index from 
 localhost:3000/site. But when I try to view localhost:3000/about it 
 gives me an error message Unknown action
 
 No action responded to show. Actions: about, help, and index
 
 So it appears something is not connecting, even though I specified the 
 action name and the action is defined in my controller.

Hi Tony,
Site is your controller name.
If you need to access a method from controller, the url should be like 
this
'localhost:3000/site/about'.

When you hit 'localhost:3000/site' the actual url is 
'localhost:3000/site/index'.
So in link to you need to specify controller name and action name.
If you need the url like localhost:3000/about, you need to specify 
following in route:-
map.connect '/about', :controller = 'site', :action = 'about'.

Thanks,
Anubhaw
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[Rails] Re: Paperclip Trouble - Not Writing to the Database

[A. Leek]

Parker Selbert wrote:
 There is a duality to Paperclip in that it is meant to process anything, 
 but the default processor (Thumbnail) is for images. I'm guessing the 
 versatility of it is why it doesn't do a hard check for ImageMagick 
 before it tries to process anything.
 
 As far as the Paperclip Processor knows the command just fails, and 
 therefor processing fails, and therefore there is no image to link to. I 
 highly recommend writing a test that just checks that the path you're 
 using for ImageMagick exists. Something as simple as:
 
 IMAGE_MAGICK_PATH = /my/path/to/imagemagick
 
 def test_image_magick_is_installed
   assert File.exist?(IMAGE_MAGICK_PATH)
 end
 
 At least then you know that your install is working.

Well I tried that, and it comes back false... The error messages give 
the right path for ImageMagick, but they still fail on the identify 
command. I've tested identify from the command line, and it works 
fine. I'm pretty lost as to what to do now, Paperclip seems to 
understand there's ImageMagick in Program Files, they just don't want to 
talk to each other.

The images do get to a temp location in Local Settings\Temp, so some 
moving around is happening. Honestly, I'm just trying to get files 
uploaded in general, I'm only testing it on images because that's what 
all the guides are for and I wanted to have something working before I 
generalized. This is getting a lot more problematic than I expected. I 
guess the next thing to do is go to the Paperclip Google Group and see 
if they know anything.
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Re: [Rails] Error in Rails 3 Release notes

[Peter De Berdt]

I hope the fact that you see config.something did ring a bell that  
the setting has been moved to environment.rb and doesn't belong into a  
controller anymore.


On 10 Aug 2010, at 20:13, Dorian wrote:


There is : filter_parameter_logging is deprecated in favour of
config.filter_parameters  :password. but this don't work : and
config.filter_parameters  :password work, so there is an error ?

http://edgeguides.rubyonrails.org/3_0_release_notes.html#action-controller


Best regards

Peter De Berdt

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Re: [Rails] Re: How do I optimize this query?

[Edmond Kachale]

Sprite,
I propose a small change. Add a space between the sql_query string and the
@top_tippers variable (for readability sake):

def top_tippers
   sql_query = SELECT top_tippers.total_tips AS total_tips,
top_tippers.client_id AS client_id,
users.login_slug AS login_slug,
users.login AS login
FROM (
SELECT SUM(tips.amount_cents) AS total_tips,
tips.client_id AS client_id
FROM tips
WHERE tips.vendor_id = #{self.id}
GROUP BY tips.client_id
ORDER BY total_tips DESC) AS top_tippers, users
WHERE top_tippers.client_id  = users.id


   @top_tippers = User.find_by_sql(sql_query)
end

And this blog post may be helpful too as you code: Top 10 Things That Annoy
Programmershttp://www.kevinwilliampang.com/2008/08/28/top-10-things-that-annoy-programmers/
.

Regards,

---
Edmond
Software Developer | Baobab Health Trust (http://www.baobabhealth.org/) |
Malawi

Cell:  +265 999 465 137 | +265 881 234 717

*Many people doubt open source software and probably don’t realize that
there is an alternative… which is just as good.. -- Kevin Scannell*

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[Rails] Rails 3.0 and counter_cache error

[andrea longhi]

Hello,
I'm working on a rails 3.0 project and today I tried to add a counter
cache column, but I keep getting this error:

ArgumentError: Unknown key(s): counter_cache

This happens with any combinations of rails 3.0 beta4, rc, ruby 1.8.7
and 1.9.2.

Regards
Andrea



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[Rails] script/console history

[Third Replicator]

When you quit script/console you lose your command history.  What
would it take to get get that command history to persist?  I wouldn't
mind working on it if somebody had a good suggestion as to how to
achieve that and if it was an acceptable solution to the core team.

Cheers,
D :)

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[Rails] Redirect loop

[Pale Horse]

I have one record in a database that is encountering a redirect loop.

When I point my browser to www.sitenamehere.co.uk/case_studies/1, it
displays a redirect loop error message.

When I point my browser to www.sitenamehere.co.uk/case_studies/2, it
does not.

Now, when I point my browser to
www.sitenamehere.co.uk/case_studies/show/1, no error occurs and the
page is displayed exactly as it should.

Also, when I point my browser to
www.sitenamehere.co.uk/case_studies/show/2, no error occurs and the
page is displayed exactly as it should.

What is the problem here? My routes are set up correctly when I review
the output of rake routes.

If there's any code you need, please ask. However, I assume someone has
encountered this before.
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[Rails] Help geting started

[neigaard]

Hi

I am reading O'Reilly Rails Cookbook, but I can not get the examples
working. Here is what I have done so far:

rails mytest --database=mysql

ruby script/generate migration build_db
--BuildDb class--
class BuildDb  ActiveRecord::Migration
  def self.up
create_table :schedules, :force = true do |t|
  t.column :scheduleTime, :datetime
  t.column :repeatEveryYear, :boolean
  t.column :message, :string

  t.timestamps
end
  end

  def self.down
drop_table :schedules
  end
end
--BuildDb class--

rake db:migrate

ruby script/generate model schedules (generates a new empty migration,
I deleted it)

ruby script/generate controller schedules

Edited my controller, and added: scaffold :schedules

But when I try to test my application, the mongrel log gives me this:


Wed Aug 11 12:06:10 +0200 2010: Error calling Dispatcher.dispatch
#NoMethodError: You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.split
/Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/
action_controller/cgi_process.rb:52:in `dispatch_cgi'
/Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/
action_controller/dispatcher.rb:101:in `dispatch_cgi'
/Users/sneigaard/.gem/ruby/1.8/gems/actionpack-2.3.8/lib/
action_controller/dispatcher.rb:27:in `dispatch'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:
76:in `process'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:
74:in `synchronize'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:
74:in `process'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:159:in
`process_client'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in
`each'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in
`process_client'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in
`run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in
`initialize'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in
`new'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in
`run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in
`initialize'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in
`new'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in
`run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
configurator.rb:282:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
configurator.rb:281:in `each'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
configurator.rb:281:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:128:in
`run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
command.rb:212:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281
/usr/bin/mongrel_rails:19:in `load'
/usr/bin/mongrel_rails:19


Hm well should this not work?

Thank you
Søren

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[Rails] Re: Re: link_to underlying urls/paths are showing in the actual view

[Jule Nissen]

The path is showing up in my links too. Tried Safari and FireFox.
Did you find a solution to this problem?


/landge

Matt Royer wrote:
 Thanks for the tips Colin and Anand... Neither corrected the issue. I'm 
 going to see if I can do this from another system. I'm wondering if my 
 installation is jacked up or something. I'll post again and let everyone 
 know what i've found. I'm on my system at work, so am limited by what I 
 can do. I'll try this from home and see what I come up with.
 
 Thanks again for the suggestions!
 
 --Matt

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Re: [Rails] Help geting started

[Michael Pavling]

On 11 August 2010 11:13, neigaard sneiga...@gmail.com wrote:
 Hi

 I am reading O'Reilly Rails Cookbook, but I can not get the examples
 working.

That's not really a beginners tutorial book - it's more for reference
on how to deal with specific problems.
You may be better off with a book like Agile Web Development With
Rails, which does take you through from first principles.

Also, I'm not sure how up-to-date the Cookbook is (mine's for Rails
1.2 I think!), and it looks like you're running 2.3.8, so that may be
part of the problems you're having.

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[Rails] Re: Help geting started

[Anubhaw Prakash]

neigaard wrote:
 Hi
 
 I am reading O'Reilly Rails Cookbook, but I can not get the examples
 working. Here is what I have done so far:
 
 rails mytest --database=mysql


Maybe you should start Rails learning by following 
'http://guides.rubyonrails.org/' site.

Thanks,
Anubhaw

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Re: [Rails] script/console history

[Edmond Kachale]

Third Replicator,

If you are using some Linux system then you are safe. I use Ubuntu myself. I
was tied of rewriting everything I put on the console too. So I with some
little effort and help from friends, I made a small hack. Now, I have a
simple script that helps me keep track of command-line history for both *irb
* and *script/console*.

Follow the steps below:

   - *create* *.irbrc* file in your home directory :

ceek...@kanjedza:~$ touch .irbrc

   - *open* *.irbrc* using your preferred text editor (I prefer command-line
   based ones: *vi, vim, gvim*), *add* the following lines and* save*:

*# This script saves and retrieves up to 600 lines of
# command-line history in both irb and script/console
# of a **Rails's project. (UP and DOWN ARROW keys to navigate)
# In addition, it supports auto-completion.(Use the
# TAB key to get auto-complete suggestions).*
*# *
*# :SAVE_HISTORY keeps the maximum number of lines to be saved
# customize this to suite the amount of history would
# like to retrieve
#
# :HISTORY_FILE keeps the file name where the
# history is kept. In this case it is saved in the
# home directory of the current user
# i.e in the same directory where as this .irbrc file
*
ARGV.concat [ --readline, --prompt-mode, simple ]
require 'irb/completion'
require 'irb/ext/save-history'
require 'rubygems'
require 'map_by_method'
require 'wirble'
require 'pp'

IRB.conf[:AUTO_INDENT]= true
IRB.conf[:SAVE_HISTORY] = 600
IRB.conf[:HISTORY_FILE] = #{ENV['HOME']}/.irb-save-history

Wirble.init
Wirble.colorize

Once you have this, you will be able to retrieve script/console's
command-line history up to 600 lines. Please inform me if doesn't work. I
would be very happy to get as much input as possible.

I think *Sprite* will also find this useful.
*
P/S: I am not sure if I have violated the forum rules by adding an
attachment. If so, forgive me and inform me how best I can send files
through.*

Regards,

---
Edmond
Software Developer | Baobab Health Trust (http://www.baobabhealth.org/) |
Malawi

Cell:  +265 999 465 137 | +265 881 234 717

*Many people doubt open source software and probably don’t realize that
there is an alternative… which is just as good.. -- Kevin Scannell*



On 11 August 2010 11:49, Third Replicator thirdreplica...@gmail.com wrote:

 When you quit script/console you lose your command history.  What
 would it take to get get that command history to persist?  I wouldn't
 mind working on it if somebody had a good suggestion as to how to
 achieve that and if it was an acceptable solution to the core team.

 Cheers,
 D :)

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.irbrc
Description: Binary data

Re: [Rails] script/console history

[David Beckwith]

Very nice! It works on my Mac 10.6, Ruby 1.9.1 via RVM, Rails 2.3.8.
I had to install a couple of the required gems.  Do you have it on
Github?

D :)


On Wed, Aug 11, 2010 at 3:54 AM, Edmond Kachale
edmond.kach...@baobabhealth.org wrote:
 Third Replicator,

 If you are using some Linux system then you are safe. I use Ubuntu myself. I
 was tied of rewriting everything I put on the console too. So I with some
 little effort and help from friends, I made a small hack. Now, I have a
 simple script that helps me keep track of command-line history for both irb
 and script/console.

 Follow the steps below:

 create .irbrc file in your home directory :

 ceek...@kanjedza:~$ touch .irbrc

 open .irbrc using your preferred text editor (I prefer command-line based
 ones: vi, vim, gvim), add the following lines and save:

 # This script saves and retrieves up to 600 lines of
 # command-line history in both irb and script/console
 # of a Rails's project. (UP and DOWN ARROW keys to navigate)
 # In addition, it supports auto-completion.(Use the
 # TAB key to get auto-complete suggestions).
 #
 # :SAVE_HISTORY keeps the maximum number of lines to be saved
 # customize this to suite the amount of history would
 # like to retrieve
 #
 # :HISTORY_FILE keeps the file name where the
 # history is kept. In this case it is saved in the
 # home directory of the current user
 # i.e in the same directory where as this .irbrc file

 ARGV.concat [ --readline, --prompt-mode, simple ]
 require 'irb/completion'
 require 'irb/ext/save-history'
 require 'rubygems'
 require 'map_by_method'
 require 'wirble'
 require 'pp'

 IRB.conf[:AUTO_INDENT]= true
 IRB.conf[:SAVE_HISTORY] = 600
 IRB.conf[:HISTORY_FILE] = #{ENV['HOME']}/.irb-save-history

 Wirble.init
 Wirble.colorize

 Once you have this, you will be able to retrieve script/console's
 command-line history up to 600 lines. Please inform me if doesn't work. I
 would be very happy to get as much input as possible.

 I think Sprite will also find this useful.

 P/S: I am not sure if I have violated the forum rules by adding an
 attachment. If so, forgive me and inform me how best I can send files
 through.

 Regards,

 ---
 Edmond
 Software Developer | Baobab Health Trust (http://www.baobabhealth.org/) |
 Malawi

 Cell:  +265 999 465 137 | +265 881 234 717

 Many people doubt open source software and probably don’t realize that
 there is an alternative… which is just as good.. -- Kevin Scannell



 On 11 August 2010 11:49, Third Replicator thirdreplica...@gmail.com wrote:

 When you quit script/console you lose your command history.  What
 would it take to get get that command history to persist?  I wouldn't
 mind working on it if somebody had a good suggestion as to how to
 achieve that and if it was an acceptable solution to the core team.

 Cheers,
 D :)

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[Rails] names and stuff

[bingo bob]

I'm trying to stuff like this in my BabyName model..

  before_save :capitalize

  def capitalize
self.title= title.capitalize
self.forename = forename.capitalize
self.surname  = surname.capitalize
self.middlenames  = middlenames.split.each { |x| print
x.capitalize!,  }.join( )
  end

  def full_name
self.title +   + self.forename +   + self.middlenames +   +
self.surname
  end

  def initials

  end


  #

two things;

1) my full_name method doens't seem great in that I might get two spaces
between names.
2) how do I grab the initials method ?
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[Rails] An implementation level question

[Tom Mac]

Hi
  I have a message model and message_participants table.
message_participants table because same message goes to various
recipients.
  Messaging between either company to users  OR user to company. So an
initial design of tables made like

messages table
---

+---+--+--+-+-++
| Field | Type | Null | Key | Default | Extra  |
+---+--+--+-+-++
| id| int(11)  | NO   | PRI | NULL| auto_increment |
| subject   | varchar(255) | YES  | | NULL||
| message_thread_id | int(11)  | YES  | | NULL||
| message   | text | YES  | | NULL||
| company_id| int(11)  | YES  | | NULL||
+---+--+--+-+-++


message_participants table


+---+--+--+-+-++
| Field | Type | Null | Key | Default | Extra  |
+---+--+--+-+-++
| id| int(11)  | NO   | PRI | NULL| auto_increment |
| direction_in  | tinyint(1)   | YES  | | NULL||
| direction_out | tinyint(1)   | YES  | | NULL||
| type  | varchar(255) | YES  | | NULL||
| company_id| int(11)  | YES  | | NULL||
| user_id   | int(11)  | YES  | | NULL||
| message_id| int(11)  | YES  | | NULL||
+---+--+--+-+-++

Here about 'type' field I am not sure. My question is should I treat
message_participants like STI or polymorphic? I can't decide it.

Relation is

message has_many message_participants
message_participants belongs_to message


Please guide
Thanks
Tom
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[Rails] keeping file field if error

[Maese]

hi, i'm doing a plugin for upload files, but after upload i have to
validate some fields and if don't pass de validation come back to the
create page keeping the introduced dates, so the user can change the
wrongs date without itroduce all again, my problem is that i can keep
all the dates less the file, and i'd like keep it too, any idea?

the code of the controller for keep dates:

 def new

@document = AlfrescoDocument.new(params[:document])
@document.project_id = @project.id
@edit_metadata = false
@file=Tempfile.new(params[:file])
@metadata = AlfrescoMetadata.new(params[:metadata])
.

and in the view the file is loaded with:

p
label%=l(:label_attachment)%span class=required*/label
%= file_field_tag 'file', :size = 30, :id = nil  -%
/p

thanks.

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[Rails] Re: Paperclip Trouble - Not Writing to the Database

[Parker Selbert]

A. Leek wrote:
 Well I tried that, and it comes back false... The error messages give 
 the right path for ImageMagick, but they still fail on the identify 
 command. I've tested identify from the command line, and it works 
 fine. I'm pretty lost as to what to do now, Paperclip seems to 
 understand there's ImageMagick in Program Files, they just don't want to 
 talk to each other.

Ah, I think I see a potential problem. It's actually a pretty common 
thing in Windows development using Perl, Ruby etc. When you're using the 
shell Windows will handle the PATH including Program Files as 
Program\ Files without you having to do anything. When Paperclip tries 
to run the command through Ruby your request gets broken up at the space 
between Program Files, and it is shown as two different commands:

C:\Program
Files\ImageMagick\imagemagick.exe

Or something to that effect. If it isn't happening with Program Files it 
could just as easily by happening with your temporary content, which 
also has a space in the path:

identify C:\Local
Settings\Temp\crazyfilename,0,1.jpg

 
 The images do get to a temp location in Local Settings\Temp, so some 
 moving around is happening. Honestly, I'm just trying to get files 
 uploaded in general, I'm only testing it on images because that's what 
 all the guides are for and I wanted to have something working before I 
 generalized. This is getting a lot more problematic than I expected. I 
 guess the next thing to do is go to the Paperclip Google Group and see 
 if they know anything.

Stick with it, in the end it really does make things easier. Keep in 
mind that all of these libraries aren't developed with WIndows in mind 
and you'll really have to compensate. If possible pretend your system is 
*nix, keep your installs in C:\lib or C:\bin and remove the path issues.
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[Rails] Re: Starting Mongrel failes on Mac OS 10.6

[Morten Lindow]

Gregor gregor.mit...@... writes:

 
 On 2 Jun., 02:10, Hassan Schroeder hassan.schroe...@... wrote:
  On Tue, Jun 1, 2010 at 4:38 PM, Gregor gregor.mit...@... wrote:
   Sorry for that, but first I gone the wrong way and after some hours I
   noticed how easy it is to install rails.. I use the command ruby
   script/server. How do I see if webrick starts?
 
  prompt% script/server webrick
 
   Output of gem list --local:
 
   actionmailer (2.3.8)
   actionpack (2.3.8)
   activerecord (2.3.8, 2.3.4)
   activeresource (2.3.8)
   activesupport (2.3.8, 2.3.4, 2.2.3)
 
  Whatever wrong way you started out with, you might want to just
  `sudo gem uninstall rails` completely, and then re-install it.
 
  Did you create your test project before or after you installed the 2.3.8
  version of Rails?
 
  --
  Hassan Schroeder  hassan.schroe...@...
  twitter: @hassan
 
 Yeah, I re-installed rails and it doesn't work at all. The project was
 created after installing version 2.3.8 and it's a riddle to me, why
 there are different versions of some packages.
 
I am having the same problem on on Ubuntu. Did you find a solution?

script/server

fails with 

= Booting Mongrel
= Rails 2.3.8 application starting on http://0.0.0.0:3000
= Call with -d to detach
= Ctrl-C to shutdown server
Exiting
/usr/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/handler/mongrel.rb:10:in
`initialize': wrong number of arguments (5 for 4) (ArgumentError)

While script/server webrick works fine.

cheers,
Morten




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[Rails] my final year project.

[psyionx]

Hallo there, i'm currently doing my final year project and currently
in my final year and 2 more semesters to go in my local university.
my lecturer told me that i can choose a language to build a web app on
my own. since ROR is new to most of us and i read news how easy it is
to use ruby to built apps from various sources. but i'm still
wondering where is a good start to learn ROR. my back ground is that i
did some lessons on php. and my last project of php involves me to
built a system to manage students who lives in the hostel.

in short. my FYP requires me to built a system that can manage a shop
that only sells toilet bowl and sink, plus possible franchise
branching. hahah, this project its so funny that i took the project in
request... but soon know that its not just a small fish that i can
swallow peacefully.

here's what i can imagine so far, my system need to be able to record
new stock and record it like a stock keeper do and register new model
if its so new that this is the companies latest model with a picture.
the management need to set price for the different models that they
got. than if some one buys a few toilet bowl. my system need to be
able to deduct the stock and come out a delivery order for the stock
keeper. the casher need to be able to print an invoice if the buyer
pays by cheque Or print a receipt if buyer pays by cash. and all print
have letter head attached to it page by page.

then heres another part of the system that can check which branch have
stock for a certain model of toilet bowl or give a summery on the
stock on different branches.

i'm given 8 months to complete this project. but i don't think i need
2 months to complete this project so that i have more time fooling my
self on other subjects or do more part time job in mc D to pay my
fees .

1.my question is, can i built this system using ROR? i can imagine
building it using php. but i really want to learn ROR
2.hmm... i was wondering if i print a receipt, if the item list got so
long, my printer will split the page in two, where the header will be
print at the first page and no header on the next page. and the length
of the page is inconsistent if the item list differs.. how do i
overcome this? i can imagine that the company have already have a
header  printed on the paper first then set the margin for the printer
to avoid printing on the header. but, i don't think this will amaze my
lecturer.
3.can anyone send me a link where's the best place to read so that i
can learn more about ROR?


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Re: [Rails] Help geting started

[Jan Marquardt]

On 08/11/2010 12:13 PM, neigaard wrote:

Hi

I am reading O'Reilly Rails Cookbook, but I can not get the examples
working. Here is what I have done so far:



Hey,

I also just started learning rails. First I've read The well grounded 
Rubyist to learn the language itself and now I'm reading Agile Web 
Development with Rails.


Cheers,

Jan

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Re: [Rails] my final year project.

[Peter De Berdt]

On 11 Aug 2010, at 12:26, psyionx wrote:


1.my question is, can i built this system using ROR? i can imagine
building it using php. but i really want to learn ROR


Remember that RoR is a framework and not a language. Compare it to  
CodeIgniter, CakePHP, Symphony in the PHP space.


As to your question: yes, RoR can do that. In fact, your whole project  
description is a class example of an MVC based application. If you  
have worked with unit and integration tests before in the course of  
your education, I would recommend using a BDD or TDD approach for your  
Rails app right away.



2.hmm... i was wondering if i print a receipt, if the item list got so
long, my printer will split the page in two, where the header will be
print at the first page and no header on the next page. and the length
of the page is inconsistent if the item list differs.. how do i
overcome this? i can imagine that the company have already have a
header  printed on the paper first then set the margin for the printer
to avoid printing on the header. but, i don't think this will amaze my
lecturer.


Generate a PDF instead. I would recommend PrinceXML, which you can  
just use in demo mode since it's just a school project. PrinceXML  
allows you to generate a PDF from HTML+CSS, including all the cases  
with headers and footers you correctly indicated as problematic with  
just an HTML print.



3.can anyone send me a link where's the best place to read so that i
can learn more about ROR?


http://guides.rubyonrails.org/
http://peepcode.com/products/test-first-development

Just google around, there's plenty of Rails related resources out there.


Best regards

Peter De Berdt

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Re: [Rails] Redirect loop

[Dave Aronson]

On Wed, Aug 11, 2010 at 06:03, Pale Horse li...@ruby-forum.com wrote:

 I have one record in a database that is encountering a redirect loop.

So what's different about that record?  I'd bet it includes or
references some resource that's the problem.

-Dave

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[Rails] Re: An implementation level question

[Marnen Laibow-Koser]

Tom Mac wrote:
 Hi
   I have a message model and message_participants table.
 message_participants table because same message goes to various
 recipients.
   Messaging between either company to users  OR user to company.
[...]
 Here about 'type' field I am not sure. My question is should I treat
 message_participants like STI or polymorphic? I can't decide it.

STI: single-table *inheritance*.  Does User inherit from Company, or 
Company from User?  Probably not.  So no inheritance is involved, and 
you probably want a polymorphic association.

Best,
--
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http://www.marnen.org
mar...@marnen.org
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[Rails] Re: names and stuff

[Frederick Cheung]

On Aug 11, 7:18 am, bingo bob li...@ruby-forum.com wrote:
 I'm trying to stuff like this in my BabyName model..

   before_save :capitalize

   def capitalize
     self.title        = title.capitalize
     self.forename     = forename.capitalize
     self.surname      = surname.capitalize
     self.middlenames  = middlenames.split.each { |x| print
 x.capitalize!,  }.join( )
   end

   def full_name
     self.title +   + self.forename +   + self.middlenames +   +
 self.surname
   end

   def initials

   end

   #

 two things;

 1) my full_name method doens't seem great in that I might get two spaces
 between names.

You could build an array with all the components, remove any blanks or
nils and then use join on all that

 2) how do I grab the initials method ?

as in how to write it ? forename  surname should be straightforward,
for middlenames you could just split on spaces and then take the first
letter of each component

Fred
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[Rails] Re: Redirect loop

[Pale Horse]

Dave Aronson wrote:
 On Wed, Aug 11, 2010 at 06:03, Pale Horse li...@ruby-forum.com wrote:
 
 I have one record in a database that is encountering a redirect loop.
 
 So what's different about that record?  I'd bet it includes or
 references some resource that's the problem.
 
 -Dave
 
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Surely if that were true, it'd error when I pass in the 'show' action 
into the URL?
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[Rails] Re: Redirect loop

[Marnen Laibow-Koser]

Pale Horse wrote:
 Dave Aronson wrote:
 On Wed, Aug 11, 2010 at 06:03, Pale Horse li...@ruby-forum.com wrote:
 
 I have one record in a database that is encountering a redirect loop.
 
 So what's different about that record?  I'd bet it includes or
 references some resource that's the problem.
 
 -Dave
 
 --
[...]
 
 Surely if that were true, it'd error when I pass in the 'show' action 
 into the URL?

That depends on how your routes are set up.

Best,
--
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http://www.marnen.org
mar...@marnen.org
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[Rails] Re: Paperclip Trouble - Not Writing to the Database

[Marnen Laibow-Koser]

Parker Selbert wrote:
[...]
 Keep in 
 mind that all of these libraries aren't developed with WIndows in mind 
 and you'll really have to compensate. If possible pretend your system is 
 *nix, keep your installs in C:\lib or C:\bin and remove the path issues.

Or don't pretend.  Rails development on Windows is problematic, from all 
the info I have (note: I don't use Windows myself).  So if you can't get 
your hands on a Mac or other *nix system, at least install a *nix VM 
(Virtual Rails has been making a splash lately).

Best,
--
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http://www.marnen.org
mar...@marnen.org
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[Rails] Re: Redirect loop

[Frederick Cheung]

On Aug 11, 6:03 am, Pale Horse li...@ruby-forum.com wrote:

 What is the problem here? My routes are set up correctly when I review
 the output of rake routes.

Look at your log files to see where the browser is being redirected 
by what bit of your code

Fred
 If there's any code you need, please ask. However, I assume someone has
 encountered this before.
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[Rails] Re: reload is using a cache and i dont want it to be

[Robert Walker]

Josh Sharpe wrote:
 class PendingOrder  ActiveRecord::Base
   def sleep_until_processed
 sleep 0.5
 while !processed?
   reload
   sleep 0.25
 end
   end
 end
 
 Aug 10 19:43:38 prod-app1 foo[31608]: PendingOrder Load (0.6ms)
 SELECT * FROM `pending_orders` LIMIT 1
 Aug 10 19:43:39 prod-app1 foo[31496]: CACHE (0.0ms)   SELECT * FROM
 `pending_orders` WHERE (`pending_orders`.`id` = 221)
 
 So the first query is legit -- but second query is cached, and so
 forth.  Every subsequent query ends up being a cached value, forever.
 
 How can I make the above method *not* look at a cache?

Not forever! Subsequent queries are cached until an update changes the 
underlying data. Isn't it good to read from the cache if the underlying 
database hasn't changed?

I am assuming that processed? reads from a column in your 
pending_orders table. If something in your application changes that 
value then the query cache should be cleared automatically. However, if 
that database change were to happen outside of your Rails application I 
could see that your code could end up blocking forever.

In any case I would recommend adding some circuit breaker code to your 
method to prevent blocking forever. Maybe some sort of timeout/watchdog 
to limit the amount of time this method could block.
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[Rails] what's with the snowman?

[Mirek Rusin]

what's with the snowman in forms?

div style=margin:0;padding:0;display:inline
  input name=_snowman type=hidden value=☃
  input name=authenticity_token type=hidden
value=DOw4is1mrktdfQqm6HMUSmeSDTC73BGqt1z0OwDwsbU=
/div

mirek rusin

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[Rails] Re: reload is using a cache and i dont want it to be

[Robert Walker]

Josh Sharpe wrote:
 class PendingOrder  ActiveRecord::Base
   def sleep_until_processed
 sleep 0.5
 while !processed?
   reload
   sleep 0.25
 end
   end
 end

 Robert Walker wrote:
 In any case I would recommend adding some circuit breaker code to your 
 method to prevent blocking forever. Maybe some sort of timeout/watchdog 
 to limit the amount of time this method could block.

And, if your Rails application is single treaded then your 
sleep_until_processed method could block your entire Rails application 
never allowing other parts of the application to perform the work 
necessary to update the pending_orders table.

Maybe you should consider offloading this work to a background process 
using something like delayed_job or similar.
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[Rails] Re: what's with the snowman?

[Robert Walker]

Mirek Rusin wrote:
 what's with the snowman in forms?
 
 div style=margin:0;padding:0;display:inline
   input name=_snowman type=hidden value=☃
   input name=authenticity_token type=hidden
 value=DOw4is1mrktdfQqm6HMUSmeSDTC73BGqt1z0OwDwsbU=
 /div
 
 mirek rusin

http://railssnowman.info/
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[Rails] Re: reload is using a cache and i dont want it to be

[Robert Walker]

Frederick Cheung wrote:
 On Aug 11, 11:07�am, Robert Walker li...@ruby-forum.com wrote:
 I am assuming that processed? reads from a column in your
 pending_orders table. If something in your application changes that
 value then the query cache should be cleared automatically. However, if
 that database change were to happen outside of your Rails application I
 could see that your code could end up blocking forever.

 It's more than that - the cache is in memory, so the cache won't be
 cleared if a different rails instances touches the data

I actually misstated that, sorry. I should have said anything outside 
the current Rails instance (including other Rails instances).

Thanks Frederick for the clarification. And also for the uncached 
solution. I wasn't actually aware of that, but it's definitely good to 
know.
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[Rails] Re: my final year project.

[Sandy]

On Aug 11, 8:52 am, Peter De Berdt peter.de.be...@pandora.be wrote:
 On 11 Aug 2010, at 12:26, psyionx wrote:

  1.my question is, can i built this system using ROR? i can imagine
  building it using php. but i really want to learn ROR

 Remember that RoR is a framework and not a language. Compare it to  
 CodeIgniter, CakePHP, Symphony in the PHP space.

 As to your question: yes, RoR can do that. In fact, your whole project  
 description is a class example of an MVC based application. If you  
 have worked with unit and integration tests before in the course of  
 your education, I would recommend using a BDD or TDD approach for your  
 Rails app right away.

  2.hmm... i was wondering if i print a receipt, if the item list got so
  long, my printer will split the page in two, where the header will be
  print at the first page and no header on the next page. and the length
  of the page is inconsistent if the item list differs.. how do i
  overcome this? i can imagine that the company have already have a
  header  printed on the paper first then set the margin for the printer
  to avoid printing on the header. but, i don't think this will amaze my
  lecturer.

 Generate a PDF instead. I would recommend PrinceXML, which you can  
 just use in demo mode since it's just a school project. PrinceXML  
 allows you to generate a PDF from HTML+CSS, including all the cases  
 with headers and footers you correctly indicated as problematic with  
 just an HTML print.

  3.can anyone send me a link where's the best place to read so that i
  can learn more about ROR?

 http://guides.rubyonrails.org/http://peepcode.com/products/test-first-development

 Just google around, there's plenty of Rails related resources out there.

 Best regards

 Peter De Berdt

While I agree with much of what Peter said, I have had extensive
experience with generating .pdf files, including PrinceXML.  The
problems which I experienced with PrinceXML were (a) it requires an
external step in that you have to generate the .pdf from Prince,
based on a file which you created from your ROR application; and (b)
you have to manually go into the xml file and escape things like 
signs.  Also, Prince requires that you generate a specific .css file
(no big deal, but another step).

After playing with various other .pdf generation techniques, I landed
on the combination of the Prawn gem and the Prawnto plugin, which
allow a seamless integration of your ROR application and .pdf output.
As far as the issue of headers at the start of each page, what I do
is to simply start each individual item with a NewPage followed by a
Header partial.

Good luck with your EOY project, and ROR is definitely the way to go.

Sandy

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[Rails] Paperclip generating crap urls on server, works on dev

[Fernando Perez]

Hi,

I have the following:

has_attached_file :data,
 :styles = {:theora = {:format = ogv}, :still = {:format =
jpg},
:small = {:format = jpg}},
 :url= /uploads/products/:basename:suffix.:extension,
 :path   = :rails_root/uploads/products/:basename:suffix.:extension


Let's say I upload a video called video.mp4, now I want paperclip to
generate the url:

object.data.url(:still) = /some/url/video.jpg


But for some reason on my server, paperclip generates:
/some/url/video.mp4

Moreover, if I update code and restart the server, paperclip will
correctly generate the .jpg extension the first time, but if I reload
the page, it messes up and goes back to .mp4.


Everything works fine on my dev machine (mac mongrel+nginx), and this
strange behavior only happens on the server (freebsd passenger+nginx).


Did anyone experience such weird thing? It's driving me crazy!.
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[Rails] Re: my final year project.

[Marnen Laibow-Koser]

Fernando Perez wrote:
 Remember that RoR is a framework and not a language. Compare it to
 CodeIgniter, CakePHP, Symphony in the PHP space.
 
 No RoR is a thing to build websites, as pure php, symphony, and pure 
 ruby do, so it is fair to compare them.

It's fair to compare Rails and Symfony.  It's fair to compare pure PHP 
and pure Ruby.  That's about it, really.

 
 RoR is stuff written in Ruby that avoids writing boiler plate.

No, it's much more than that, unless you have a very broad definition of 
boilerplate.

 
 Beware 2 months is certainly no enough to get your app going.

Of course it is.  The app is very simple, and the OP should be able to 
get a usable version within 2 months (depending on how long it takes him 
to learn Ruby and Rails, of course).

 In real 
 life, a usable blog takes more than 15 minutes to get built.

Of course.  15 minutes is not 2 months.

 
 Have fun learning and working with Rails.

Best,
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[Rails] Re: Merb configuration options in rails3

[Robert Walker]

arai wrote:
 As much fun as it is to type rails s thin -p 1234, I'd rather just
 use rails s, or even merb.  I've spent hours digging through
 google and various documentation projects trying to figure this out,
 how can I do this in rails3?

Add to ~/.profile (or similar):
---
alias merb=rails s thin -p 1234

Then do this to activate the alias:
---
source ~/.profile

(or simply close the terminal window and open a new one)

While not a direct answer this would do precisely what you're asking.

I use this technique for a number of things like running ./script/server 
by typing ss and ./script/console as sc for Rails 2.x.
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[Rails] Re: (Dreaded) STI, belongs_to

[Matt Jones]

On Aug 10, 2:29 pm, Gaudi Mi li...@ruby-forum.com wrote:
 Having problems with STI.  Names below have been changed to protect the
 innocent.  Imagine a system that allows someone to apply for one of two
 different types of school scholarships.  Each scholarship goes through a
 different review process, represented by a state machine (this is not a
 state machine question).  So there are two state machine classes that
 differ slightly and subclass a generic StateMachine:

 class ScholarshipApplication
   belongs_to :state_machine
 end

 class StateMachine
 end

 class StateA  StateMachine
   has_one :application
 end

 class StateB  StateMachine
   has_one :application
 end

 The problem is I can get a ScholarshipApplication instance to tell me
 its StateMachine, but the StateMachine can't tell me it's
 ScholarshipApplication.  E.g.:

 app = ScholarshipApplication.create
 state = StateA.create
 app.state_machine = state
 app.save
 app.state_machine  # returns what it should
 sm = app.state_machine
 sm.scholarship_application # throws error: Unknown column
 scholarship_applications.state_a_id...


Passing the :foreign_key option to the has_ones will definitely work.
You might also try hoisting the has_one into StateMachine (if that
makes sense for your models), as it's guessing the foreign key named
based on the class where it's declared (*probably* - I've not poked
the source to check this).

--Matt Jones

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[Rails] Re: ActiveRecord::UnknownAttributeError: unknown attribute: script type

[jemminger]

On Aug 10, 4:47 pm, Gudleik Rasch gudl...@gmail.com wrote:
 Could be a bug or even someone trying to inject malicious javascript
 code into your app.
 Either case its a good practice to have these kind of scenarios
 covered by tests.


How?  It's not really feasible to strip attrs that don't belong from
the params... I'd have to query the targeted model for its list of
valid params and then reject non-matches.  The idiom is to trustingly
throw the whole hash at the model - User.create params[:user].

 This error doesn't seem to be so much a security risk as just
perplexing.  Happened again on another action today... random field,
unknown attribute: descriptionscript type.   Safari only again.


 You should also make sure that some fields are protected from mass-assignment.
 In your hash you have is_admin = 0. If you have in your controller:
   User.create params[:user]
   # or
   @user.update_attributes params[:user]


Thanks, this has already been done.

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Re: [Rails] Re: my final year project.

[Peter De Berdt]

On 11 Aug 2010, at 17:42, Sandy wrote:


While I agree with much of what Peter said, I have had extensive
experience with generating .pdf files, including PrinceXML.  The
problems which I experienced with PrinceXML were (a) it requires an
external step in that you have to generate the .pdf from Prince,
based on a file which you created from your ROR application;


If you mean you have to pass on a rendered document to the prince  
command line utility, then yes. Generate a file... no. Whether you use  
Princely (http://github.com/mbleigh/princely) or the PDF helper (http://sublog.subimage.com/2007/05/29/html-css-to-pdf-using-ruby-on-rails 
), there is no need to generate a file as such. The content is just  
passed on to the command line utility right away.



and (b)
you have to manually go into the xml file and escape things like 
signs.  Also, Prince requires that you generate a specific .css file
(no big deal, but another step).


When you're going from web to print, you'll always end up with a  
separate styling file, although that can just be basic stuff like  
overriding background colors, hiding certain elements, defining page  
size etc in addition to your normal view stylesheet. About the  
escaping, I've never had that problem, since you will be escaping the  
HTML in your ERB views anyway (and in Rails 3 it will be done by  
default). Not using the XML feature, but the HTML - PDF feature though.



After playing with various other .pdf generation techniques, I landed
on the combination of the Prawn gem and the Prawnto plugin, which
allow a seamless integration of your ROR application and .pdf output.
As far as the issue of headers at the start of each page, what I do
is to simply start each individual item with a NewPage followed by a
Header partial.


We also looked into all PDF solutions out there.

We had to provide our customers with the option to generate their own  
PDF layouts, including vector images in the header etc. So basically  
what we have in our application is a module where our customers can  
use something they are familiar with (they're advertising agencies for  
the most part), i.e. HTML + CSS, with some Liquid tags sprinkled in,  
which we then run through the Liquid renderer and pass on to prince,  
the result is returned to the Rails app right away and streamed to the  
client, not a single file is generated along the way.


Prawn requires you to code the PDF into your app. Whether one likes  
the syntax is debatable (I for one don't :-)). It's also fairly  
limited in what it can do and there's tricky involved to achieve some  
fairly common things, like you mentioned yourself.


That said, Prince, Prawn, wicked_pdf, they are all valid options. It  
all depends on the requirements of your application.
PrinceXML is by far the most flexible and most feature rich out of the  
bunch and will give you the smallest PDF, but it comes with a very  
hefty price tag. Wicked_pdf (which uses wkhtmltopdf) is free, but when  
we tried it, it was very unstable and still had a long way to go in  
terms of features. Prawn is nice because it doesn't use any external  
applications to render the PDF, but it is very limited compared to the  
other two imo.


I'd say: complex or large documents, especially if they have vector  
images, high res images or custom fonts, are a Prince thing. Reports  
or simple documents (possibly the invoice document the original poster  
talked about) are more of Prawn's territory. Wicked_pdf dangles a bit  
in between those two, would like to hear about people's experience  
with it lately.


BTW, I'm not an avid supporter of closed source software, but I have  
to say YesLogic has excellent support and their product is great.



Best regards

Peter De Berdt

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[Rails] Re: Locking Images in HTML Files..can use it on ROR also

[Matt Jones]

On Aug 9, 11:52 pm, Jeffrey Bonson li...@ruby-forum.com wrote:
 Thank you all,for your VALUABLE information.
 I didn't find what i needed in this forum and many newbies are using
 this as a reference. That's why i posted this. Why don't u guys prove
 what u have written with some CODES, so that it becomes useful to OTHERS
 as well.

What exactly are you expecting to accomplish by flaming the list?

Regarding your need for C0DEZ!!1!one!!eleven: Uninformed devs
like you have been trying this IM IN UR WEBPAGE DISABLING RITECLICK
routine since back in the days of Geocities. Guess what? It didn't
even work *then*. Would you like me to make a screencast that
demonstrates how to disable JS in the browser to prove this?

--Matt Jones

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Re: [Rails] Re: my final year project.

[Peter De Berdt]

On 11 Aug 2010, at 18:06, Fernando Perez wrote:


Remember that RoR is a framework and not a language. Compare it to
CodeIgniter, CakePHP, Symphony in the PHP space.


No RoR is a thing to build websites, as pure php, symphony, and pure
ruby do, so it is fair to compare them.


Ruby on Rails is a framework, it even says so on the rubyonrails.org  
site. It was very fair of me to compare it to PHP frameworks like  
Symphony, which is basically a very Rails inspired framework for PHP  
developers.


Ruby is a language, as is PHP. They both can do more than serve or  
generate web pages.



RoR is stuff written in Ruby that avoids writing boiler plate.


I don't know what you see as boiler plate, but considering the amount  
of code in Rails, I would hardly say it's some helper functions to  
build websites with database interaction quicker than from scratch.  
Rails has a very well defined API, using reusable abstractions and  
programming patterns to achieve a certain featureset, i.e. build web  
applications, which by definition is a framework.



Beware 2 months is certainly no enough to get your app going. In real
life, a usable blog takes more than 15 minutes to get built.


It doesn't need to be. Modelwise the project seems to be quite easy,  
there's only a few scenarios in there that need to be covered and by  
the description alone you can clearly see the different iterations for  
the project.


The most difficult part about this application is plotting out the  
database structure and relationships and defining the user scenarios,  
all of which are totally unrelated to Rails and should be fairly  
trivial for someone in his final year of... something. Translating  
them into Rails code is just browsing the API and scratching your head  
every once in a while and let Google help you out.


The dangerous element will be how you will present it to the user and  
you can go very fancy and get stuck into a very very timeconsuming  
hell, or you can just make it simple, yet just as powerful. If you  
have time left, you can then enhance the experience by refactoring  
some views and sprinkling it with some functional Javascript (i.e.  
something that enhances the application).



Best regards

Peter De Berdt

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[Rails] Re: Paperclip generating crap urls on server, works on dev

[Fernando Perez]

Okay so it has to do with caching. On my dev machine, if I switch to 
production environment I get the same behavior. I don't know what's the 
solution.
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[Rails] PDF generation -- was: Re: Re: my final year project.

[Marnen Laibow-Koser]

Peter De Berdt wrote:
[...]
 Prawn requires you to code the PDF into your app.

That is not necessarily true.  prawn_format generates PDF files from 
HTML.  (I've never used it, so I don't know how well it works, but I'm 
going to try to switch some PDF views from Prawn code to HTML soon.)

[...]
 BTW, I'm not an avid supporter of closed source software, but I have
 to say YesLogic has excellent support and their product is great.

I've never heard a bad thing about Prince, other than its price tag. 
Good to know about support; I find that very often, the most expensive 
software has the worst support.

 
 
 Best regards
 
 Peter De Berdt

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[Rails] Re: Understanding this model relationship (possibly a HABTM and a belongs_to ?)

[Rick R]

My initial example is probably confusing. Here is another shot at it in
something that has more meaning:

A User can create multiple “notices” ( eg “Corporate meeting notice”, “Big
Sale Items”, “Job Wanted” )
A User can create multiple “notice groups” (eg “Corporate Notices”, “Public
Notices”, “My Miscellaneous Notices”)
Every notice should belong to an “notice group”
A User needs to be able to subscribe to multiple “notice groups” so that
they could  see the notices in the different groups they’re subscribed to.


To model this relationship, I was thinking:

User
  has_many :notices
  has_and_belong_to_many :notice_groups

Notice
  has_one :notice_group
  belongs_to :user

NoticeGroup
   has_and_belongs_to_many :users

So first question, is the above set up correctly?

How would I also model that a “NoticeGroup” is ‘owned/created’ by a
particular user? Right now the HABTM on NoticeGroup seems to imply that the
NoticeGroup can belong to many Users but I also need it to show that its
owned/created by a particular User (owner_id concept on NoticeGroup?), can I
have a HABTM :users and a belongs_to :User in the same NoticeGroup model
definition?




On Wed, Aug 11, 2010 at 12:20 AM, Rick R ric...@gmail.com wrote:

 I'm pretty newb and trying to get a handle on setting up a particular
 relationship with my models.

 For sake of this discussion (real app isn't with tools but for
 illustration, using tools):

 To start with (more complicated in a bit);

 - A User can have multiple tools
 - A single tool can only belong to one ToolGroup
 - A User can belong to multiple ToolGroups

 To model this relationship, I was thinking:

 User
   has_many :tools
   has_and_belong_to_many :tool_groups

 Tool
   has_one :tool_group
   belongs_to :user

 ToolGroup
   has_and_belongs_to_many :users


 So first question, is the above set up correctly?

 Once the above is set up correctly, I want to have it set up where a
 ToolGroup can also be 'owned' by a User. In other words, a user will set up
 a ToolGroup and they are the owner, but other users can belong to this
 ToolGroup. How do I model that? Do I need to set up another model that is
 called Owner that is really a User? This doesn't seem right. In reality
 the db table ToolGroup would just need an ownerID that would be a fk to
 the User table, but I'm not sure how to model that since ToolGroup already
 has a HABTM to users. Can I have a HABTM to Users and also a belongs_to
 :User?

 Thanks for any help




-- 
Rick R

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[Rails] Controller syntax

[Nathan Kirk]

why is this required:

  def new
@post = Post.find(params[:post_id])
@comment = @post.comments.build
  end

instead of:
  def new
@comment = Post.find(params[:post_id]).comments.build
  end

is the 2nd style possible? If no, why not?
if yes, why is the 1st style preferred?

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[Rails] Re: Understanding this model relationship (possibly a HABTM and a belongs_to ?)

[Marnen Laibow-Koser]

Rick R wrote:
 My initial example is probably confusing. Here is another shot at it in
 something that has more meaning:
 
 A User can create multiple “notices” ( eg “Corporate meeting notice”, 
 “Big
 Sale Items”, “Job Wanted” )
 A User can create multiple “notice groups” (eg “Corporate Notices”, 
 “Public
 Notices”, “My Miscellaneous Notices”)

Are these notice groups specific to the one user, or are they more like 
global discussion topics?

Can notice groups contain notices created by users other than the one 
who created the group?

 Every notice should belong to an “notice group”
 A User needs to be able to subscribe to multiple “notice groups” so that
 they could  see the notices in the different groups they’re subscribed 
 to.
 
 
 To model this relationship, I was thinking:
 
 User
   has_many :notices
   has_and_belong_to_many :notice_groups
 
 Notice
   has_one :notice_group

That should be belongs_to, not has_one.

   belongs_to :user
 
 NoticeGroup
has_and_belongs_to_many :users
 
 So first question, is the above set up correctly?

Maybe, maybe not.  Depends on the questions above.

 
 How would I also model that a “NoticeGroup” is ‘owned/created’ by a
 particular user? Right now the HABTM on NoticeGroup seems to imply that 
 the
 NoticeGroup can belong to many Users but I also need it to show that its
 owned/created by a particular User (owner_id concept on NoticeGroup?), 
 can I
 have a HABTM :users and a belongs_to :User in the same NoticeGroup model
 definition?
 

Sure.  Just give the associations different names.

Best,
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mar...@marnen.org
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[Rails] Re: Controller syntax

[Marnen Laibow-Koser]

Nathan Kirk wrote:
 why is this required:
 
   def new
 @post = Post.find(params[:post_id])
 @comment = @post.comments.build
   end
 
 instead of:
   def new
 @comment = Post.find(params[:post_id]).comments.build
   end
 
 is the 2nd style possible? If no, why not?
 if yes, why is the 1st style preferred?

Depends on your view code.  Remember that controller @instance variables 
are copied to the view, so that the first example would make both @post 
and @comment available in the view, whereas the second example would 
only make @comment available.

Best,
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mar...@marnen.org
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Re: [Rails] Re: Understanding this model relationship (possibly a HABTM and a belongs_to ?)

[Rick R]

On Wed, Aug 11, 2010 at 2:26 PM, Marnen Laibow-Koser
li...@ruby-forum.comwrote:

 Rick R wrote:
  My initial example is probably confusing. Here is another shot at it in
  something that has more meaning:
 
  A User can create multiple “notices” ( eg “Corporate meeting notice”,
  “Big
  Sale Items”, “Job Wanted” )
  A User can create multiple “notice groups” (eg “Corporate Notices”,
  “Public
  Notices”, “My Miscellaneous Notices”)

 Are these notice groups specific to the one user, or are they more like
 global discussion topics?


They are created by one user but multiple users can subscribe to them:

A User needs to be able to subscribe to multiple “notice groups” so that
they could  see the notices in the different groups they’re subscribed to.



 Can notice groups contain notices created by users other than the one
 who created the group?


No.



  How would I also model that a “NoticeGroup” is ‘owned/created’ by a
  particular user? Right now the HABTM on NoticeGroup seems to imply that
  the
  NoticeGroup can belong to many Users but I also need it to show that its
  owned/created by a particular User (owner_id concept on NoticeGroup?),
  can I
  have a HABTM :users and a belongs_to :User in the same NoticeGroup model
  definition?
 

 Sure.  Just give the associations different names.



Ok, I'll look into that. thanks.

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[Rails] [JOB] Ruby on Rails Developer - Chicago, IL

[Tallience]

Hi,

We are looking for a junior to mid-level Ruby on Rails Developer in
Chicago, IL.  No formal experience necessary, just someone with a
passion for RoR and the desire to write Ruby every day.

If interested, please respond with your resume, salary requirements
and a code sample.  Someone will contact you ASAP!

Thanks!

Regards,

Tallience, LLC
j...@tallience.com
www.tallience.com

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Re: [Rails] Re: what's with the snowman?

[Philip Hallstrom]

 what's with the snowman in forms?
 
 div style=margin:0;padding:0;display:inline
  input name=_snowman type=hidden value=☃
  input name=authenticity_token type=hidden
 value=DOw4is1mrktdfQqm6HMUSmeSDTC73BGqt1z0OwDwsbU=
 /div
 
 mirek rusin
 
 http://railssnowman.info/

Interesting.  Maybe the wrong place to ask this, but...

Why doesn't Rails strip _snowman out of params automagically so I don't have to 
worry about it?

Why not change authenticity_token to contain UTF8 characters?

I'm mostly just curious...

-philip

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Re: [Rails] Re: Auto-increment column scoped to another column

[Andre Fonseca]

I try to use the methods before or after. I think it is better to be done in
the DB.

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Re: [Rails] Re: rake db:create uninitialized constant Mysql::Error

[Andre Fonseca]

you need reinstall mysql gems with correct flags. Try google this : mysql
gems flags snow leopard

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Re: [Rails] Re: localhost:3000/

[Andre Fonseca]

There's also Devise. Devise has more feature than Authlogic.

Search in gitub

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[Rails] Re: Paperclip generating crap urls on server, works on dev

[Parker Selbert]

Fernando Perez wrote:
 Okay so it has to do with caching. On my dev machine, if I switch to 
 production environment I get the same behavior. I don't know what's the 
 solution.

You're encountering this because Paperclip was originally built to 
process a file into different sizes of itself, original, medium, 
thumbnail etc. In that scenario the format stays the same, so if you use 
a jpg you'll have a thumbnail jpg as well.

When you're looking at converting to a different format or, in your 
case, capturing a still it doesn't check the mime-type for every style 
it has. There is at least one branch on github where somebody has 
attempted to solve this, but here is the approach I've followed:

1. Create an initializer at

# config/initializers/paperclip.rb

Paperclip.interpolates :style_extension do |attachment, style|
  default = File.extname(attachment.original_filename).gsub(/^\.+/, )

  case style.to_s
  when /theora/ then 'ogv'
  when /still/  then 'jpg'
  else
default
  end
end

2. Use that interpolation in your url and path options:
  :url= /uploads/products/:basename:suffix.:style_extension,
  :path = 
:rails_root/uploads/products/:basename:suffix.:style_extension


For reference on interpolations: 
http://rdoc.info/projects/thoughtbot/paperclip

Hope it helps!

- Parker
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[Rails] Hash.from_xml does not handle attributes as of rails3 beta4

[Tim Uckun]

Can anybody confirm whether or not this has been fixed in the rc releases?

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[Rails] rails 3- Could not find generator session.

[David Zhu]

Hello,

I am trying to use Authlogic in Rails 3.

when I run  rails g session admin_session to create the session, I
get-

==
Could not find generator session.
==

I'm using Rail 3 RC and working off the Rail3 Branch now

==
GemFile:

gem 'authlogic', :git = 'git://github.com/odorcicd/
authlogic.git', :branch = 'rails3'

==

Any hints? I'm using Rails 3 RC

I need this really bad!! Thanks

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[Rails] ActiveRecord errors ... Best way to rescue a live web application?

[slindsey3000]

Hi all,

I have some issues when a link is clicked twice quickly that deletes
an ActiveRecord row.

All I really want to do is set up some universal catch that will
redirect all application errors to index.

Best way?

Thanks!

Shawn

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[Rails] Re: rails 3- Could not find generator session.

[David Zhu]

 Hello,

 I am trying to use Authlogic in Rails 3.

 when I run  rails g session admin_session to create the session, I
 get-

 ==
 Could not find generator session.
 ==

 I'm using Rail 3 RC and working off the Rail3 Branch now

 ==
 GemFile:

 gem 'authlogic', :git = 'git://github.com/odorcicd/
 authlogic.git', :branch = 'rails3'

 ==

 Any hints? I'm using Rails 3 RC

 I need this really bad!! Thanks

aww w/e i just made it by hand

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[Rails] Re: rails 3- Could not find generator session.

[David Zhu]

 Hello,

 I am trying to use Authlogic in Rails 3.

 when I run  rails g session admin_session to create the session, I
 get-

 ==
 Could not find generator session.
 ==

 I'm using Rail 3 RC and working off the Rail3 Branch now

 ==
 GemFile:

 gem 'authlogic', :git = 'git://github.com/odorcicd/
 authlogic.git', :branch = 'rails3'

 ==

 Any hints? I'm using Rails 3 RC

 I need this really bad!! Thanks

aww w/e i just made the file by hand

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[Rails] Re: Re: what's with the snowman?

[Robert Walker]

Philip Hallstrom wrote:
 http://railssnowman.info/
 Interesting.  Maybe the wrong place to ask this, but...
 
 Why doesn't Rails strip _snowman out of params automagically so I don't 
 have to worry about it?

Well you could most likely include your own Rack middleware to melt the 
_snowman from your params hash. No need to wait (and hope) for the 
Rails team to do it for you.

 Why not change authenticity_token to contain UTF8 characters?

I would assume that authenticity_token is some form of SHA-1 hash 
encoded in Base64, which by definition produces 7-bit ASCII character 
strings.
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[Rails] Problem with changing from mySql to PostrgreSql with rails

[Mohammed Alenazi]

I have this statement running Ok in my development mode
 @users = User.paginate :joins = :properties ,:group =
'users.id', :page = params[:page], :order = 'count(properties.id)
DESC',:conditions = ['users.id != 1']

when I push my app to Heroku it gives me this error

column users.email must appear in the GROUP BY clause or be used in
an aggregate function
: SELECT users.* FROM users   INNER JOIN properties ON
properties.user_id = users.id  WHERE (users.id != 1)  GROUP BY
users.id,users.login,users.name ORDER BY count(properties.id) DESC
LIMIT 10 OFFSET 0):

by doing some research on Google, I found out that it's a DB Engin
problem. MySql allows me to do it but PostgreSql does not.

How can I run the same query on PostgreSql. I am trying to get the
users ordered by the users with highest properties.

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Re: [Rails] where can I get up to date instantrails ?

[Norm Scherer]

Dani Dani wrote:

Hi, can someone please tell me where can I find up-to-date instantrails
(with rails 2.38, ruby 1.8.7) ... ?
Thanks for any help
Dani
  
You can just install instant rails and 'gem update' and you should 
get what you want.  I have done that with minimal effort and updated as 
far as RoR 2.2.2 (maybe further, I do not really remember and if I did I 
decided to use the 2.2.2 version).


Norm

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[Rails] Re: Re: what's with the snowman?

[Parker Selbert]

Philip Hallstrom wrote:
 http://railssnowman.info/
 Interesting.  Maybe the wrong place to ask this, but...
 
 Why doesn't Rails strip _snowman out of params automagically so I don't 
 have to worry about it?

As of tonight the snowman is gone entirely. The key is utf8 and the 
value is ✓ (#x2713;). Far more on the sane side.
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Re: [Rails] Re: Controller syntax

[Norm Scherer]

Marnen Laibow-Koser wrote:

Nathan Kirk wrote:
  

why is this required:

  def new
@post = Post.find(params[:post_id])
@comment = @post.comments.build
  end

instead of:
  def new
@comment = Post.find(params[:post_id]).comments.build
  end

is the 2nd style possible? If no, why not?
if yes, why is the 1st style preferred?



Depends on your view code.  Remember that controller @instance variables 
are copied to the view, so that the first example would make both @post 
and @comment available in the view, whereas the second example would 
only make @comment available.
  
And of course if you just had @post you could easily extract comments in 
the view code by @post.comments.build.  @comment is really not necessary 
because @post gives you the handle you need.


Norm

Best,
--
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http://www.marnen.org
mar...@marnen.org
  


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[Rails] named routes don't load in plugin

[Rodrigo Mendonça]

Hi all,

I have one plugin for a datagrid.
This plugin have one module wich use json with ajax.

The poblem: When i call the method by ajax and generate data to compose
datagrid i tried use my named route post_url, but it's not being loaded on
routes.rb (this behaviour exist only here)

How can i load these helpers (edit_post, new_post...) inside my plugin

Thanks

-- 
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(62) 8567-3142

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[Rails] Re: where can I get up to date instantrails ?

[Dani Dani]

Norm Scherer wrote:
 You can just install instant rails and 'gem update' and you should
 get what you want.  I have done that with minimal effort and updated as
 far as RoR 2.2.2 (maybe further, I do not really remember and if I did I
 decided to use the 2.2.2 version).
 
 Norm

Thank you Norm.
I was looking to upgrade my InstantRails to rails 2.3.8 from 2.3.5 and 
ruby to 1.8.7. from 1.8.6.
Now I have managed to do it. I have first upgraded gem to 1.3.7, 
upgraded
ruby directly to x:\rails\ruby directory (windows), and at last gem 
update rails has done the rest - rails 2.3.8.

Now I have the environment I was looking for:
Rails 2.3.8
Ruby 1.8.7
Thank you again.

Dani
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Re: [Rails] Re: where can I get up to date instantrails ?

[kannav rajeev]

hey dani can you please tell how you do that in a explained way i am in the
same situation

On Thu, Aug 12, 2010 at 10:31 AM, Dani Dani li...@ruby-forum.com wrote:

 Norm Scherer wrote:
  You can just install instant rails and 'gem update' and you should
  get what you want.  I have done that with minimal effort and updated as
  far as RoR 2.2.2 (maybe further, I do not really remember and if I did I
  decided to use the 2.2.2 version).
 
  Norm

 Thank you Norm.
 I was looking to upgrade my InstantRails to rails 2.3.8 from 2.3.5 and
 ruby to 1.8.7. from 1.8.6.
 Now I have managed to do it. I have first upgraded gem to 1.3.7,
 upgraded
 ruby directly to x:\rails\ruby directory (windows), and at last gem
 update rails has done the rest - rails 2.3.8.

 Now I have the environment I was looking for:
 Rails 2.3.8
 Ruby 1.8.7
 Thank you again.

 Dani
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