Re: Multiple apps/Same DB

[Carson Gross]

Makes sense, I can hack that.

I think a potentially good solution would be to allow sub-domain isolation 
of web workers for an app.  It's a pretty common pattern to split out your 
app along sub-domains (e.g. api.foo.com vs app.foo.com) which have 
different access patterns/performance requirements and need perf isolation 
from one another.  Of course, the devil is in the details and maybe that 
ends up being a terrible idea to implement, but it's exactly what I'd like 
right now.  :)

Thanks,
Carson

On Friday, August 24, 2012 4:55:09 PM UTC-7, Peter van Hardenberg wrote:
>
> We do kinda-sorta support it, but it currently has a limitation in the 
> form that if we ever need to update your DATABASE_URL, we can't tell that 
> you're connecting from two apps and one of them (the non-owning app) will 
> go unupdated. We've got a feature in alpha right now which will resolve 
> this, but I don't believe it's ready for external users yet.
>
> In conclusion: go ahead, but it's grody, and we're hoping it will be 
> better soon.
>
> -p
>
> On Fri, Aug 24, 2012 at 3:27 PM, Carson Gross 
> > wrote:
>
>> Hey Everyone,
>>
>> I'm going to be running two heroku apps with the same backing database (I 
>> want request isolation between the API and the web application so that if I 
>> screw the web application up from a perf perspective it won't back up the 
>> API.)
>>
>> It seems pretty simple to do this:
>>
>>   
>> http://stackoverflow.com/questions/5981508/share-database-between-2-apps-in-heroku
>>
>> and it seems like Heroku kinda-sorta considers it a supported 
>> configuration.
>>
>> Anyone have comments on and/or experience with it?
>>
>> Thanks,
>> Carson
>>  
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>
>

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Re: Multiple apps/Same DB

[Peter van Hardenberg]

We do kinda-sorta support it, but it currently has a limitation in the form
that if we ever need to update your DATABASE_URL, we can't tell that you're
connecting from two apps and one of them (the non-owning app) will go
unupdated. We've got a feature in alpha right now which will resolve this,
but I don't believe it's ready for external users yet.

In conclusion: go ahead, but it's grody, and we're hoping it will be better
soon.

-p

On Fri, Aug 24, 2012 at 3:27 PM, Carson Gross  wrote:

> Hey Everyone,
>
> I'm going to be running two heroku apps with the same backing database (I
> want request isolation between the API and the web application so that if I
> screw the web application up from a perf perspective it won't back up the
> API.)
>
> It seems pretty simple to do this:
>
>
> http://stackoverflow.com/questions/5981508/share-database-between-2-apps-in-heroku
>
> and it seems like Heroku kinda-sorta considers it a supported
> configuration.
>
> Anyone have comments on and/or experience with it?
>
> Thanks,
> Carson
>
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Re: Play 2.0 Build Error [object execution is not a member of package play.api.libs.concurrent]

[Jay]

I got this working, thanks.  I created a new build-pack as you suggested.  

If you are having troubles you can look/fork my build-pack 
cainj
/*heroku-buildpack-scala *to 
build with sbt  12.0.  


Jay




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Multiple apps/Same DB

[Carson Gross]

Hey Everyone,

I'm going to be running two heroku apps with the same backing database (I 
want request isolation between the API and the web application so that if I 
screw the web application up from a perf perspective it won't back up the 
API.)

It seems pretty simple to do this:

  
http://stackoverflow.com/questions/5981508/share-database-between-2-apps-in-heroku

and it seems like Heroku kinda-sorta considers it a supported configuration.

Anyone have comments on and/or experience with it?

Thanks,
Carson

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Re: Latest heroku gem

[Keith Rarick]

On Fri, Aug 24, 2012 at 4:53 AM, Jeff Schmitz
 wrote:
> So I uninstalled and reinstalled the gem there, which fixed the netrc 
> problem???

If you're using Heroku Toolbelt, there's little reason to use the
heroku gem either inside or outside of a particular app. I'd
suggest uninstalling the heroku gem completely.

> $ heroku run script/console --app scholaric
> ...
> Any ideas?

The `heroku run` command should be the same as what you use
locally to get a rails console. With recent versions of rails, I believe
this is usually `rails console`. So try:

$ heroku run --app scholaric rails console

> where is script/console running in the above command?

You can answer this question (and many others) by running:

$ heroku run --app scholaric bash

and then poking around. For example:

$ heroku run --app randompizza bash
Running `bash` attached to terminal... up, run.1
~ $ pwd
/app
~ $ ls
Procfile  bin  public

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Re: Resizing images on Amazon S3 from Heroku

[m...@bolser.co.uk]

Thanks Stephen - it's good to know imagemagick is available and supported.

I've also had a couple of people confirm that my suggested approach is fine 
and *won't* incur Amazon data transfer fees.

Mike

On Friday, August 24, 2012 8:33:46 AM UTC+1, Stephen wrote:
>
> Hi Mike
>
> I have ImageMagick running on Heroku for my website. Only admins can post 
> images, and it can take over a dyno, so it's not a perfect solution. I use 
> it with Mark Evans' excellent Rack-based Dragonfly gem that scales my 
> images on the fly.
>
> Details for setting up Dragonfly on Heroku-based applications is here:
> http://markevans.github.com/dragonfly/file.Heroku.html
>
> I simply reference the Dragonfly gem in my Gemfile, and there's no mention 
> of ImageMagic (or similar) in my Gemfile.lock file, so I guess in 
> development it just uses the Homebrew-installed version on my MacBook and 
> Heroku's own pre-installed ImageMagic in production.
>
> I do reference ImageMagic in my configuration settings for Dragonfly in my 
> Initializers directory, instructions here:
> http://markevans.github.com/dragonfly/file.ImageMagick.html
>
> For alternatives, there are two "image processing in the cloud" add-ons 
> for Heroku, Blitline and Cloudinary. And some other online services too.
>
> But I've been pretty happy with Dragonfly and how I can easily copy down 
> my originally-formatted images from Amazon S3 to my laptop and still 
> display them in development mode when I'm offline and demonstrating my 
> website.
>
> I think Dragonfly, Blitline and Cloudinary all have documention for 
> dealing with images that are already in S3.
>
> Stephen
>
>
> On 23 August 2012 23:32, mi...@bolser.co.uk  <
> mi...@bolser.co.uk > wrote:
>
>> Hi all
>>
>>
>>- I have lots of JPEG images in an Amazon S3 bucket.
>>- I have a Rails app running on Heroku, which knows the filenames of 
>>the images.
>>- The rails app is not responsible for uploading the files to S3. In 
>>fact, it's the other way round: the file is POSTed to S3, which then 
>>informs the Rails app of the file name via a success_action_redirect as 
>>per http://aws.amazon.com/articles/1434/ 
>>
>> *The Rails app requires greyscale, thumbnail copies of the images.* So 
>> I'm thinking about writing a rake task within the Rails app to produce the 
>> copies.
>>
>> My questions are:
>>
>>1. Is Imagemagick available and supported on Heroku?
>>2. If so, is there any documentation on how to use Imagemagick on 
>>Heroku?
>>3. If so, do I have to pull down the file from S3 to a tmp directory, 
>>make the copy then upload back to S3? 
>>4. 
>>
>>If so, would I incur Amazon S3 data transfer fees?
>>
>>or...
>>5. 
>>
>>Is there a better way? :)
>>
>> Thanks!
>>
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>> Groups "Heroku" group.
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>
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Re: Latest heroku gem

[Jeff Schmitz]

In theory, it should be heroku run rails console for rails 3 and heroku run
script/console for 2.3

On Fri, Aug 24, 2012 at 10:36 AM, vincent daubry  wrote:

> Same problem here after updating heroku toolbelt  :
>
> $ heroku console
> `heroku console` is now deprecated. Please use `heroku run` to run a
> console: http://bit.ly/NlhGxl.
>
> $ heroku run console
> Running `console` attached to terminal... up, run.1
> bash: console: command not found
>
>
> same problem with 'heroku run -a myappname rails console'
>
>
> Le vendredi 24 août 2012 15:03:55 UTC+2, Ed Jones a écrit :
>
>> Well, then I guess I'm glad I didn't upgrade my toolbelt yesterday when
>> my app crashed!
>>
>> (Of course I'm on cedar)
>>
>>
>>
>>
>>
>> On Friday, August 24, 2012 8:24:45 AM UTC-4, iamtheschmitzer wrote:
>>>
>>> $ heroku run console --app scholaric
>>> Running `console` attached to terminal... up, run.1
>>> bash: console: command not found
>>>
>>>
>>> On Fri, Aug 24, 2012 at 7:17 AM, Ed Jones  wrote:
>>>
 Did you just try
 $ heroku run console
 That's how it works on Cedar 3.2.x



 On Friday, August 24, 2012 7:53:00 AM UTC-4, iamtheschmitzer wrote:
>
> heroku update caused be netrc issues, so I got the toolbelt last night.
>
> A problem:
>
> This is installed as a package, so when I cd to my project dir, rvm is
> running its own version of heroku gem, which has the issue I started with.
>  So I uninstalled and reinstalled the gem there, which fixed the netrc
> problem???
>
> I guess heroku update does not fix any new dependencies.
>
> Now, though, I can't run a console (bamboo/rails 2.3.11) the "right"
> way
>
> $ heroku console --app scholaric
>
> `heroku console` is now deprecated. Please use `heroku run` to run a
> console: http://bit.ly/NlhGxl.
>
> Ruby console for scholaric.heroku.com
> >>
>
> So reading the link, I try the right way:
>
> $ heroku run script/console --app scholaric
> Running `script/console` attached to terminal... up, run.1
> :29:in `require': no such
> file to load -- script/../config/boot (LoadError)
> from :29:in `require'
>  from script/console:2:in `'
>
> where is script/console running in the above command?
>
> IRB works:
>
> $ heroku run irb --app scholaric
> Running `irb` attached to terminal... up, run.1
> irb(main):001:0> exit
>
>
> Any ideas?
>
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Re: Play 2.0 Build Error [object execution is not a member of package play.api.libs.concurrent]

[Jay]

I forked the buildpack for 0.12 and changed the following line in compile 

SBT_JAR="sbt-launch-0.11.3.2.jar" =>   SBT_JAR="sbt-launch-0.12.0.jar"

and still had no success.  Obviously, not the correct change.  How do I 
configure my custom build-pack to use sbt 0.12.0?

Jay 


On Monday, August 20, 2012 8:38:06 AM UTC-6, James Ward wrote:
>
> Play 2 doesn't usually have a modules directory. 
>
> Yes, Heroku pulls the sbt-plugin from the plugins.sbt file.  You can 
> simulate it with: 
> sbt stage 
>
> (Which should do the same thing as play stage.) 
>
> It is possible though that this is an sbt version problem because Heroku 
> uses sbt 0.11.3 and I think Play 2.1 may be bumping to 0.12.  You could 
> fork the buildpack for 0.12: 
> https://github.com/heroku/heroku-buildpack-scala 
>
> -James 
>
>
> On 08/20/2012 08:14 AM, Jay wrote: 
> > I was reading a post and it mentioned to .gitignore the "modules" 
> > directory.  I have my modules directory in the repo, is this my problem? 
> > 
> > On Saturday, August 18, 2012 9:52:53 PM UTC-6, Jay wrote: 
> > 
> > Tried clearing out the ivy cache, still no success. 
> > 
> > java version "1.6.0_33" 
> > Java(TM) SE Runtime Environment (build 1.6.0_33-b03-424-11M3720) 
> > Java HotSpot(TM) 64-Bit Server VM (build 20.8-b03-424, mixed mode) 
> > 
> > 
> > Does heroku pull the play version from the plugins.sbt file? 
> > 
> > plugins.sbt 
> >  
> > logLevel := Level.Warn 
> > 
> > resolvers ++= Seq( 
> >  "Typesafe repository" at 
> > "http://repo.typesafe.com/typesafe/releases/ 
> > ", 
> >  Resolver.url("Typesafe ivy-snapshots", 
> >  url("http://repo.typesafe.com/typesafe/ivy-snapshots 
> > 
> > "))(Resolver.ivyStylePatterns),
> >  
>
> >  "Typesafe snapshots" at 
> > "http://repo.typesafe.com/typesafe/snapshots 
> > " 
> > ) 
> > 
> > // Use the Play sbt plugin for Play projects 
> > addSbtPlugin("play" % "sbt-plugin" % "2.1-SNAPSHOT") 
> > 
> > 
> > 
> > 
> > On Saturday, August 18, 2012 2:31:14 PM UTC-6, James Ward wrote: 
> > 
> > Hmmm...  Possibly a different snapshot version or a different 
> > JDK version. 
> > 
> > Make sure you are using JDK 6 locally and clear out your local 
> ivy 
> > cache, then run "play stage" again. 
> > 
> > -James 
> > 
> > 
> > On 08/18/2012 11:05 AM, Jay wrote: 
> >  > Thanks for the quick response. 
> >  > 
> >  > It runs local with 'play stage'. 
> >  > 
> >  > My repos are the following: 
> >  > resolvers += "Apache Snapshot repository" at 
> >  > 
> > "https://repository.apache.org/content/repositories/snapshots/ 
> > ", 
>
> >  > resolvers += "t2v.jp  repo" at 
> > "http://www.t2v.jp/maven-repo/";, 
> >  > resolvers += "Spy Repository" at 
> > "http://files.couchbase.com/maven2 
> > " 
> >  > 
> >  > 
> >  > On Saturday, August 18, 2012 9:00:21 AM UTC-6, James Ward 
> wrote: 
> >  > 
> >  > Can you reproduce this locally by running: 
> >  > play stage 
> >  > 
> >  > Is the snapshot build being downloaded from a remote 
> repo? 
> >  > 
> >  > -James 
> >  > 
> >  > 
> >  > On 08/18/2012 08:46 AM, Jay wrote: 
> >  >  > Hello, 
> >  >  > 
> >  >  > I'm trying to push my code to Heroku, but I'm running 
> > into the 
> >  > following 
> >  >  > issue: 
> >  >  > 
> >  >  > 
> > /tmp/build_gzxih7dftrne/app/controllers/Application.scala:16: 
> > object 
> >  >  > execution is not a member of package 
> > play.api.libs.concurrent 
> >  >  >  [error] import 
> >  > play.api.libs.concurrent.execution.defaultContext 
> >  >  > 
> >  >  > Currently, using Play-2.1-SNAPSHOT and trying to use 
> > play's Async 
> >  >  > design.  I'm not sure what's going on here. 
> >  >  > 
> >  >  > Thanks 
> >  >  > 
> >  >  > Jay 
> >  >  > 
> >  >  > -- 
> >  >  > You received this message because you are subscribed 
> > to the Google 
> >  >  > Groups "Heroku" group. 
> >  >  > 
> >  >  > To unsubscribe from this group, send email to 
> >  >  > heroku+un...@googlegroups.com  
> >  >  > For more options, visit this group at 
> >  > 

Re: Latest heroku gem

[vincent daubry]

Same problem here after updating heroku toolbelt  :

$ heroku console
`heroku console` is now deprecated. Please use `heroku run` to run a 
console: http://bit.ly/NlhGxl.

$ heroku run console
Running `console` attached to terminal... up, run.1
bash: console: command not found


same problem with 'heroku run -a myappname rails console'


Le vendredi 24 août 2012 15:03:55 UTC+2, Ed Jones a écrit :
>
> Well, then I guess I'm glad I didn't upgrade my toolbelt yesterday when my 
> app crashed!
>
> (Of course I'm on cedar)
>
>
>
>
>
> On Friday, August 24, 2012 8:24:45 AM UTC-4, iamtheschmitzer wrote:
>>
>> $ heroku run console --app scholaric
>> Running `console` attached to terminal... up, run.1
>> bash: console: command not found
>>
>>
>> On Fri, Aug 24, 2012 at 7:17 AM, Ed Jones  wrote:
>>
>>> Did you just try 
>>> $ heroku run console
>>> That's how it works on Cedar 3.2.x
>>>
>>>
>>>
>>> On Friday, August 24, 2012 7:53:00 AM UTC-4, iamtheschmitzer wrote:

 heroku update caused be netrc issues, so I got the toolbelt last night.

 A problem:

 This is installed as a package, so when I cd to my project dir, rvm is 
 running its own version of heroku gem, which has the issue I started with. 
  So I uninstalled and reinstalled the gem there, which fixed the netrc 
 problem??? 

 I guess heroku update does not fix any new dependencies.

 Now, though, I can't run a console (bamboo/rails 2.3.11) the "right" way

 $ heroku console --app scholaric

 `heroku console` is now deprecated. Please use `heroku run` to run a 
 console: http://bit.ly/NlhGxl.

 Ruby console for scholaric.heroku.com
 >>

 So reading the link, I try the right way:

 $ heroku run script/console --app scholaric
 Running `script/console` attached to terminal... up, run.1
 :29:in `require': no such file 
 to load -- script/../config/boot (LoadError)
 from :29:in `require'
  from script/console:2:in `'

 where is script/console running in the above command?

 IRB works:

 $ heroku run irb --app scholaric
 Running `irb` attached to terminal... up, run.1
 irb(main):001:0> exit


 Any ideas?

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>>
>>

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Re: Error in the heroku/django tutorial raise ImproperlyConfigured("You need to specify NAME in your Django settings file.") django.core.exceptions.ImproperlyConfigured: You need to specify NAME i

[Victor Vorski]

you need to do:

% heroku pg:promote HEROKU_POSTGRESQL_BLUE

to make sure that your DATABASE_URL is set.

>
>

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Re: Latest heroku gem

[Ed Jones]

Well, then I guess I'm glad I didn't upgrade my toolbelt yesterday when my 
app crashed!

(Of course I'm on cedar)





On Friday, August 24, 2012 8:24:45 AM UTC-4, iamtheschmitzer wrote:
>
> $ heroku run console --app scholaric
> Running `console` attached to terminal... up, run.1
> bash: console: command not found
>
>
> On Fri, Aug 24, 2012 at 7:17 AM, Ed Jones 
> > wrote:
>
>> Did you just try 
>> $ heroku run console
>> That's how it works on Cedar 3.2.x
>>
>>
>>
>> On Friday, August 24, 2012 7:53:00 AM UTC-4, iamtheschmitzer wrote:
>>>
>>> heroku update caused be netrc issues, so I got the toolbelt last night.
>>>
>>> A problem:
>>>
>>> This is installed as a package, so when I cd to my project dir, rvm is 
>>> running its own version of heroku gem, which has the issue I started with. 
>>>  So I uninstalled and reinstalled the gem there, which fixed the netrc 
>>> problem??? 
>>>
>>> I guess heroku update does not fix any new dependencies.
>>>
>>> Now, though, I can't run a console (bamboo/rails 2.3.11) the "right" way
>>>
>>> $ heroku console --app scholaric
>>>
>>> `heroku console` is now deprecated. Please use `heroku run` to run a 
>>> console: http://bit.ly/NlhGxl.
>>>
>>> Ruby console for scholaric.heroku.com
>>> >>
>>>
>>> So reading the link, I try the right way:
>>>
>>> $ heroku run script/console --app scholaric
>>> Running `script/console` attached to terminal... up, run.1
>>> :29:in `require': no such file 
>>> to load -- script/../config/boot (LoadError)
>>> from :29:in `require'
>>>  from script/console:2:in `'
>>>
>>> where is script/console running in the above command?
>>>
>>> IRB works:
>>>
>>> $ heroku run irb --app scholaric
>>> Running `irb` attached to terminal... up, run.1
>>> irb(main):001:0> exit
>>>
>>>
>>> Any ideas?
>>>
>>>   -- 
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>
>

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Re: Latest heroku gem

[Jeff Schmitz]

$ heroku run console --app scholaric
Running `console` attached to terminal... up, run.1
bash: console: command not found


On Fri, Aug 24, 2012 at 7:17 AM, Ed Jones  wrote:

> Did you just try
> $ heroku run console
> That's how it works on Cedar 3.2.x
>
>
>
> On Friday, August 24, 2012 7:53:00 AM UTC-4, iamtheschmitzer wrote:
>>
>> heroku update caused be netrc issues, so I got the toolbelt last night.
>>
>> A problem:
>>
>> This is installed as a package, so when I cd to my project dir, rvm is
>> running its own version of heroku gem, which has the issue I started with.
>>  So I uninstalled and reinstalled the gem there, which fixed the netrc
>> problem???
>>
>> I guess heroku update does not fix any new dependencies.
>>
>> Now, though, I can't run a console (bamboo/rails 2.3.11) the "right" way
>>
>> $ heroku console --app scholaric
>>
>> `heroku console` is now deprecated. Please use `heroku run` to run a
>> console: http://bit.ly/NlhGxl.
>>
>> Ruby console for scholaric.heroku.com
>> >>
>>
>> So reading the link, I try the right way:
>>
>> $ heroku run script/console --app scholaric
>> Running `script/console` attached to terminal... up, run.1
>> :29:in `require': no such file
>> to load -- script/../config/boot (LoadError)
>> from :29:in `require'
>>  from script/console:2:in `'
>>
>> where is script/console running in the above command?
>>
>> IRB works:
>>
>> $ heroku run irb --app scholaric
>> Running `irb` attached to terminal... up, run.1
>> irb(main):001:0> exit
>>
>>
>> Any ideas?
>>
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Re: Latest heroku gem

[Ed Jones]

Did you just try 
$ heroku run console
That's how it works on Cedar 3.2.x


On Friday, August 24, 2012 7:53:00 AM UTC-4, iamtheschmitzer wrote:
>
> heroku update caused be netrc issues, so I got the toolbelt last night.
>
> A problem:
>
> This is installed as a package, so when I cd to my project dir, rvm is 
> running its own version of heroku gem, which has the issue I started with. 
>  So I uninstalled and reinstalled the gem there, which fixed the netrc 
> problem??? 
>
> I guess heroku update does not fix any new dependencies.
>
> Now, though, I can't run a console (bamboo/rails 2.3.11) the "right" way
>
> $ heroku console --app scholaric
>
> `heroku console` is now deprecated. Please use `heroku run` to run a 
> console: http://bit.ly/NlhGxl.
>
> Ruby console for scholaric.heroku.com
> >>
>
> So reading the link, I try the right way:
>
> $ heroku run script/console --app scholaric
> Running `script/console` attached to terminal... up, run.1
> :29:in `require': no such file to 
> load -- script/../config/boot (LoadError)
> from :29:in `require'
>  from script/console:2:in `'
>
> where is script/console running in the above command?
>
> IRB works:
>
> $ heroku run irb --app scholaric
> Running `irb` attached to terminal... up, run.1
> irb(main):001:0> exit
>
>
> Any ideas?
>
>  

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Latest heroku gem

[Jeff Schmitz]

heroku update caused be netrc issues, so I got the toolbelt last night.

A problem:

This is installed as a package, so when I cd to my project dir, rvm is
running its own version of heroku gem, which has the issue I started with.
 So I uninstalled and reinstalled the gem there, which fixed the netrc
problem???

I guess heroku update does not fix any new dependencies.

Now, though, I can't run a console (bamboo/rails 2.3.11) the "right" way

$ heroku console --app scholaric

`heroku console` is now deprecated. Please use `heroku run` to run a
console: http://bit.ly/NlhGxl.

Ruby console for scholaric.heroku.com
>>

So reading the link, I try the right way:

$ heroku run script/console --app scholaric
Running `script/console` attached to terminal... up, run.1
:29:in `require': no such file to
load -- script/../config/boot (LoadError)
from :29:in `require'
from script/console:2:in `'

where is script/console running in the above command?

IRB works:

$ heroku run irb --app scholaric
Running `irb` attached to terminal... up, run.1
irb(main):001:0> exit


Any ideas?

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Re: Trouble configuring database with new Django app

[Victor Vorski]

I used the solution 
from: 
http://stackoverflow.com/questions/11071579/heroku-database-settings-injection-how-do-i-setup-my-dev-django-database/11072426#11072426

in .profile set:
export HEROKU_LOCAL_DEV=true # used to sel

in setthings.py:

import dj_database_url

import os

DATABASES = {'default': dj_database_url.config(default=
'postgres://localhost')}


if bool(os.environ.get('HEROKU_LOCAL_DEV', False)):

DATABASES = {

'default': {

'ENGINE': 'django.db.backends.postgresql_psycopg2', # Add 
'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.

'NAME': 'htest1',  # Or path to database 
file if using sqlite3.

'USER': '',  # Not used with sqlite3.

'PASSWORD': '',  # Not used with sqlite3.

'HOST': '',  # Set to empty string for 
localhost. Not used with sqlite3.

'PORT': '',  # Set to empty string for 
default. Not used with sqlite3.

}

}

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Re: Trouble configuring database with new Django app

[Victor Vorski]

Some information here:
http://stackoverflow.com/questions/11071579/heroku-database-settings-injection-how-do-i-setup-my-dev-django-database

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Re: Resizing images on Amazon S3 from Heroku

[Stephen Cremin]

Hi Mike

I have ImageMagick running on Heroku for my website. Only admins can post
images, and it can take over a dyno, so it's not a perfect solution. I use
it with Mark Evans' excellent Rack-based Dragonfly gem that scales my
images on the fly.

Details for setting up Dragonfly on Heroku-based applications is here:
http://markevans.github.com/dragonfly/file.Heroku.html

I simply reference the Dragonfly gem in my Gemfile, and there's no mention
of ImageMagic (or similar) in my Gemfile.lock file, so I guess in
development it just uses the Homebrew-installed version on my MacBook and
Heroku's own pre-installed ImageMagic in production.

I do reference ImageMagic in my configuration settings for Dragonfly in my
Initializers directory, instructions here:
http://markevans.github.com/dragonfly/file.ImageMagick.html

For alternatives, there are two "image processing in the cloud" add-ons for
Heroku, Blitline and Cloudinary. And some other online services too.

But I've been pretty happy with Dragonfly and how I can easily copy down my
originally-formatted images from Amazon S3 to my laptop and still display
them in development mode when I'm offline and demonstrating my website.

I think Dragonfly, Blitline and Cloudinary all have documention for dealing
with images that are already in S3.

Stephen


On 23 August 2012 23:32, m...@bolser.co.uk  wrote:

> Hi all
>
>
>- I have lots of JPEG images in an Amazon S3 bucket.
>- I have a Rails app running on Heroku, which knows the filenames of
>the images.
>- The rails app is not responsible for uploading the files to S3. In
>fact, it's the other way round: the file is POSTed to S3, which then
>informs the Rails app of the file name via a success_action_redirect as
>per http://aws.amazon.com/articles/1434/
>
> *The Rails app requires greyscale, thumbnail copies of the images.* So
> I'm thinking about writing a rake task within the Rails app to produce the
> copies.
>
> My questions are:
>
>1. Is Imagemagick available and supported on Heroku?
>2. If so, is there any documentation on how to use Imagemagick on
>Heroku?
>3. If so, do I have to pull down the file from S3 to a tmp directory,
>make the copy then upload back to S3?
>4.
>
>If so, would I incur Amazon S3 data transfer fees?
>
>or...
>5.
>
>Is there a better way? :)
>
> Thanks!
>
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