DB Design question

[jordi collell]

Hi all!

I have to store spreadsheet info on a db. Some kind of quotes where the 
user can store distinct prices for every zone. 

After modeling the data, i have a Cell like row. (related to a zone, and 
with a quantity field).. something like:

zone1  1  100
zone1  2  99
zone1  3  98

Every zone is a fk... The problem is, that data grows quick.. because some 
quotes can have up to 65 unit fields with 70 to 100 zones.. 

Currently i have a autopk field. but I'm not sure if it will scale.. If i 
have 5000 users and every users makes 100 quotations.. (7000 rows on the 
worst case) this is 35.. easy enought to get out of autoincrement 
fields.. 

I'm thinking on getting rid of the pk field, and use a unique together with 
(zone_units). do you think this is a good aproach with the orm? I saw that 
is not possible to make primary key fields ( with grouped fields), but 
perhaps I can do it with instead of declaring a int field, have a char 
field storing the 
%s_%s_%s ( quote_id, zone_id, units ) ... 

do you think the last could be a good aproach? 

Sure if i have to shard the data (on the future) I can do it, using this 
kind of keys.. Data will be queryed by zone.. (For making comparasions of 
quotes)

I will apreciate any help on the matter.


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Re: Re. My Django Book.

[Gary Roach]

Since I am grinding my way through the learning process right now I thing I 
have some fairly pithy comments to contribute. It seems that no two 
tutorials do things the same way. I got bogged down in Two  Scoops because 
I needed a more detailed cookbook approach. Tango With Django is the best 
except it is written for Django 1.7. There is a serious break between how 
1.7 and 1.8 handle template files in the settings.py file. I still haven't 
recovered from this. Initial setup made me pull my hair out by the roots 
(and I can't afford to loose much more). Some suggestions:
  If your using a database other than the built in SQLite set it up 
first.
  Setup virtualenv and virtualenvmapper next.
  Do everything else inside of virtualenv.
  Install Django with pip (virtualenv active)
Then start a tutorial. The Django documentations tutorial seemed to be very 
good until it segued into a long trites on API setup. Really annoying. I 
just wanted to get the basic system set up. That said, the official 
tutorial may still be your best bet. Good luck.

Gary R 


On Thursday, July 30, 2015 at 1:35:16 PM UTC-7, Steve Burrus wrote:
>
> * Say I was wondering if anyone else has ever read this particulkar Django 
> book called "Sams Teach Yourself Django in 24 Hours" I checked out of the 
> library yesterday? [yeah I know it's one of the "24 hours" series] Does it 
> really teach the beginner a lot of things concerning Django?*
>
>
>
>

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settings.py TEMPLATES DIRS

[Gary Roach]

Hi

I'm using Django 1.8 and python 2-7 on a Debian Linux system. I am using 
Ninja-ide as my ide. When I enter the following in the TEMPLATES section 
the settings.py file I get an invalid syntax error:

'DIRS': [os.path.join(BASE_DIR, 'templates'],


Since the DIRS entry is directly out of a tutorial I'm not sure what the 
problem implys.


Any help will be sincerely appreciated.


Gary R

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Re: One-time tasks at varying times with Uwsgi Spooler

[Javier Guerra Giraldez]

On Fri, Jul 31, 2015 at 7:26 PM, thinkwell  wrote:
> a_long_task.spool({'hello':'world', 'at':timedelta(hours=5))


the 'at' parameter should be _outside_ the callable dictionay, and it
must be the unix timestamp, not a timedelta:

a_long_task.spool({'hello':'world'},
at=(datetime.now()+timedelta(hours=5).timestamp())

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BaseListView's get_context_data is missing kwargs?

[Ken]

I created a class FilteredListView(BaseListView, FormMixin) so I can have a 
filter form in my list view.  The form submits filters via GET.  I have it 
working.  But there is a piece of the code that I feel ought to be handled 
by django.  In order to get the form into the context, I duplicated 
BaseListView.get() and changed the line

context = self.get_context_data()

to 

context = self.get_context_data(form=form)

BaseListView's get() accepts a kwargs but it is not used anywhere.  It 
seems to me that it should be passed to get_context_data() since it accepts 
a kwargs.  If it did, then I would only need to write a small get() method 
to instantiate (and optionally bind) the form, then call super with the 
appropriate kwargs argument to complete the get request processing.

Is there some reason why kwargs is not passed to get_context_data()?

Thanks


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One-time tasks at varying times with Uwsgi Spooler

[thinkwell]

I'm using django-uwsgi 
 in my 
application, but I'm needing to run asynchronous tasks (one-time only) in 
my django app at varying times, based on user input. 


I tried passing in at "at" key to a_long_task.spool({'hello':'world', 
'at':timedelta(hours=5)), but that raises a 

ValueErrror: *spooler callable dictionary must contains only bytes*


So I guess that means I can only decorate the task instead of its 
instantiation. Is there some other suggestion to enable me pass in a 
variable time param when the spooled tasked should run?


TIA!

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Re: Introduction to Pulpo-Forms

[Luciano Ferrari]

Excellent Fabio!!!

Thanks for the suggestion we will take that into account.

Luciano

El viernes, 31 de julio de 2015, 17:30:07 (UTC-3), Fabio Caritas 
Barrionuevo da Luz escribió:
>
> interesting, thanks for sharing.
>
> personally, I think that the organization of files on package is somewhat 
> confusing.
>
> said that, you can use a template (skeleton) as a base to create and 
> better organize the package.
> I like these two
>
> for a django package:
>
> https://github.com/pydanny/cookiecutter-djangopackage
>
> or more generic to any python package:
>
> https://github.com/ionelmc/cookiecutter-pylibrary
>
> It is quite easy to generate a new project skeleton:
>
> pip install cookiecutter
>
> cookiecutter https://github.com/pydanny/cookiecutter-djangopackage
>
> or
>
> cookiecutter https://github.com/ionelmc/cookiecutter-pylibrary
>
>
>
> Em quinta-feira, 30 de julho de 2015 18:46:12 UTC-3, Luciano Ferrari 
> escreveu:
>>
>> Last April we finished the development of a dynamic form builder, called 
>> pulpo-forms, to use within a Django Project. Today we’re excited to 
>> announce that we’re making the source code available on GitHub 
>> .
>>
>> Here is a short list with the most important features of this new open 
>> source tool:
>>
>>- Enable users to create forms with an easy drag&drop UI
>>- Angular directives to render the form  
>>and the dashboard
>>- Multi pages forms.
>>- RESTful API
>>- Customizable fields validations such as required, length,etc.
>>- Conditional enable for fields based on other field values (e.g. in 
>>a food preferences survey, hide the *‘How do you like your steak?’ 
>> *question 
>>to someone that previously answered that’s a vegetarian).
>>- Conditional enable for form pages based on other field values.
>>- Versions and drafts.
>>- Integration for Django models.
>>- Signals.
>>- Configurable actions – show a thank you screen, send an email, etc.
>>- Built-in statistics in the dashboard
>>- Basic field types answers can be filtered in the dashboard
>>
>> Since it was made to be flexible from the beginning, this can be extended 
>> to add new fields, validations and so on.
>>
>> We hope you enjoy it, and of coursed we are open to comments, questions 
>> and pull requests !
>>
>

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Re: Introduction to Pulpo-Forms

[Fabio Caritas Barrionuevo da Luz]

interesting, thanks for sharing.

personally, I think that the organization of files on package is somewhat 
confusing.

said that, you can use a template (skeleton) as a base to create and better 
organize the package.
I like these two

for a django package:

https://github.com/pydanny/cookiecutter-djangopackage

or more generic to any python package:

https://github.com/ionelmc/cookiecutter-pylibrary

It is quite easy to generate a new project skeleton:

pip install cookiecutter

cookiecutter https://github.com/pydanny/cookiecutter-djangopackage

or

cookiecutter https://github.com/ionelmc/cookiecutter-pylibrary



Em quinta-feira, 30 de julho de 2015 18:46:12 UTC-3, Luciano Ferrari 
escreveu:
>
> Last April we finished the development of a dynamic form builder, called 
> pulpo-forms, to use within a Django Project. Today we’re excited to 
> announce that we’re making the source code available on GitHub 
> .
>
> Here is a short list with the most important features of this new open 
> source tool:
>
>- Enable users to create forms with an easy drag&drop UI
>- Angular directives to render the form  
>and the dashboard
>- Multi pages forms.
>- RESTful API
>- Customizable fields validations such as required, length,etc.
>- Conditional enable for fields based on other field values (e.g. in a 
>food preferences survey, hide the *‘How do you like your steak?’ *question 
>to someone that previously answered that’s a vegetarian).
>- Conditional enable for form pages based on other field values.
>- Versions and drafts.
>- Integration for Django models.
>- Signals.
>- Configurable actions – show a thank you screen, send an email, etc.
>- Built-in statistics in the dashboard
>- Basic field types answers can be filtered in the dashboard
>
> Since it was made to be flexible from the beginning, this can be extended 
> to add new fields, validations and so on.
>
> We hope you enjoy it, and of coursed we are open to comments, questions 
> and pull requests !
>

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Re: Introduction to Pulpo-Forms

[Luciano Ferrari]

Tiago,

how are you?

It is really nice to hear that you like our new tool.

We have recently made public a demo project that is also available on
GitHub - https://github.com/octobot-dev/pulpo-forms-examples .

In order to access the live demo you can go to:

http://demo.pulpoforms.octobot.io/pulpo/

User: pulpo
Password: pulpo123

Soon we will publish a new post with more details about the features.

Hope you like it and we are open to question or suggestions for
improvements.

Luciano





Luciano Ferrari
www.octobot.io

Skype: octobot.io
US Phone: (+1) 650 763 2260
UY Phone: (+598) 2716 71 86




2015-07-31 13:40 GMT-03:00 Tiago Almeida :

> Hi,
>
> Sounds cool! Do you have screenshots / demos to see before installing?
> Thanks,
> Kind regards,
>
> quinta-feira, 30 de Julho de 2015 às 22:46:12 UTC+1, Luciano Ferrari
> escreveu:
>>
>> Last April we finished the development of a dynamic form builder, called
>> pulpo-forms, to use within a Django Project. Today we’re excited to
>> announce that we’re making the source code available on GitHub
>> .
>>
>> Here is a short list with the most important features of this new open
>> source tool:
>>
>>- Enable users to create forms with an easy drag&drop UI
>>- Angular directives to render the form
>>and the dashboard
>>- Multi pages forms.
>>- RESTful API
>>- Customizable fields validations such as required, length,etc.
>>- Conditional enable for fields based on other field values (e.g. in
>>a food preferences survey, hide the *‘How do you like your steak?’ 
>> *question
>>to someone that previously answered that’s a vegetarian).
>>- Conditional enable for form pages based on other field values.
>>- Versions and drafts.
>>- Integration for Django models.
>>- Signals.
>>- Configurable actions – show a thank you screen, send an email, etc.
>>- Built-in statistics in the dashboard
>>- Basic field types answers can be filtered in the dashboard
>>
>> Since it was made to be flexible from the beginning, this can be extended
>> to add new fields, validations and so on.
>>
>> We hope you enjoy it, and of coursed we are open to comments, questions
>> and pull requests !
>>
>

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Re: Introduction to Pulpo-Forms

[Tiago Almeida]

Hi,

Sounds cool! Do you have screenshots / demos to see before installing?
Thanks,
Kind regards,

quinta-feira, 30 de Julho de 2015 às 22:46:12 UTC+1, Luciano Ferrari 
escreveu:
>
> Last April we finished the development of a dynamic form builder, called 
> pulpo-forms, to use within a Django Project. Today we’re excited to 
> announce that we’re making the source code available on GitHub 
> .
>
> Here is a short list with the most important features of this new open 
> source tool:
>
>- Enable users to create forms with an easy drag&drop UI
>- Angular directives to render the form  
>and the dashboard
>- Multi pages forms.
>- RESTful API
>- Customizable fields validations such as required, length,etc.
>- Conditional enable for fields based on other field values (e.g. in a 
>food preferences survey, hide the *‘How do you like your steak?’ *question 
>to someone that previously answered that’s a vegetarian).
>- Conditional enable for form pages based on other field values.
>- Versions and drafts.
>- Integration for Django models.
>- Signals.
>- Configurable actions – show a thank you screen, send an email, etc.
>- Built-in statistics in the dashboard
>- Basic field types answers can be filtered in the dashboard
>
> Since it was made to be flexible from the beginning, this can be extended 
> to add new fields, validations and so on.
>
> We hope you enjoy it, and of coursed we are open to comments, questions 
> and pull requests !
>

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Re: Re. My Django Book.

[sarfaraz ahmed]

I am also looking for books which provide more of examples. The two scoops
of Django is more of doing things right than tutoring as MOnobot said. This
are the following things I want to learn in Django

I want to learn how to manually create form rather than creating modelform.
Combing forms from multiple models and show them under one view.

Rgards,
Sarfaraz Ahmed

On Fri, Jul 31, 2015 at 9:01 PM, monoBOT  wrote:

> two scoops is more like ways of doing things right than really explaining
> or tutoring.
>
> 2015-07-31 15:33 GMT+01:00 Mark Phillips :
>
>> The django docs are excellent. However, if you are more of a book person,
>> then try Try Two Scoops of Django (http://twoscoopspress.org/) - well
>> written and updated.
>>
>> Mark
>>
>> On Fri, Jul 31, 2015 at 6:33 AM, rmschne  wrote:
>>
>>> I'm no way an advanced user, but I found the book simplistic and not
>>> worth it.  Django's own documentation is much better
>>> https://docs.djangoproject.com
>>>
>>> On Thursday, 30 July 2015 21:35:16 UTC+1, Steve Burrus wrote:

 * Say I was wondering if anyone else has ever read this particulkar
 Django book called "Sams Teach Yourself Django in 24 Hours" I checked out
 of the library yesterday? [yeah I know it's one of the "24 hours" series]
 Does it really teach the beginner a lot of things concerning Django?*




>>> --
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>>> 
>>> .
>>>
>>> For more options, visit https://groups.google.com/d/optout.
>>>
>>
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>> 
>> .
>>
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
>
> --
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> Visite mi sitio(Visit my site): monobotsoft.es/blog/
>
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Re: Re. My Django Book.

[monoBOT]

two scoops is more like ways of doing things right than really explaining
or tutoring.

2015-07-31 15:33 GMT+01:00 Mark Phillips :

> The django docs are excellent. However, if you are more of a book person,
> then try Try Two Scoops of Django (http://twoscoopspress.org/) - well
> written and updated.
>
> Mark
>
> On Fri, Jul 31, 2015 at 6:33 AM, rmschne  wrote:
>
>> I'm no way an advanced user, but I found the book simplistic and not
>> worth it.  Django's own documentation is much better
>> https://docs.djangoproject.com
>>
>> On Thursday, 30 July 2015 21:35:16 UTC+1, Steve Burrus wrote:
>>>
>>> * Say I was wondering if anyone else has ever read this particulkar
>>> Django book called "Sams Teach Yourself Django in 24 Hours" I checked out
>>> of the library yesterday? [yeah I know it's one of the "24 hours" series]
>>> Does it really teach the beginner a lot of things concerning Django?*
>>>
>>>
>>>
>>>
>> --
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>> "Django users" group.
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>> email to django-users+unsubscr...@googlegroups.com.
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>> https://groups.google.com/d/msgid/django-users/272afb4b-6e50-45be-92a8-4580049c3a3f%40googlegroups.com
>> 
>> .
>>
>> For more options, visit https://groups.google.com/d/optout.
>>
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mezzanine uploadify HTTP Error

[Manuele Pesenti]

Hi!
I'm using Mezzanine for developing a web application but I got some pain 
with upload media library... Upload files works just fine with other table 
fields in my model but when I try to upload in media library the flash 
widget just say HTTP Error and no log can be found anywhere.
Did somebody have the same experience? Any idea how to debug this problem?

Thank you very much in advance for any replay and suggest.

Cheers

Manuele

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Re: Re. My Django Book.

[Mark Phillips]

The django docs are excellent. However, if you are more of a book person,
then try Try Two Scoops of Django (http://twoscoopspress.org/) - well
written and updated.

Mark

On Fri, Jul 31, 2015 at 6:33 AM, rmschne  wrote:

> I'm no way an advanced user, but I found the book simplistic and not worth
> it.  Django's own documentation is much better
> https://docs.djangoproject.com
>
> On Thursday, 30 July 2015 21:35:16 UTC+1, Steve Burrus wrote:
>>
>> * Say I was wondering if anyone else has ever read this particulkar
>> Django book called "Sams Teach Yourself Django in 24 Hours" I checked out
>> of the library yesterday? [yeah I know it's one of the "24 hours" series]
>> Does it really teach the beginner a lot of things concerning Django?*
>>
>>
>>
>>
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> .
>
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Re: Re. My Django Book.

[rmschne]

I'm no way an advanced user, but I found the book simplistic and not worth 
it.  Django's own documentation is much 
better https://docs.djangoproject.com

On Thursday, 30 July 2015 21:35:16 UTC+1, Steve Burrus wrote:
>
> * Say I was wondering if anyone else has ever read this particulkar Django 
> book called "Sams Teach Yourself Django in 24 Hours" I checked out of the 
> library yesterday? [yeah I know it's one of the "24 hours" series] Does it 
> really teach the beginner a lot of things concerning Django?*
>
>
>
>

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Re: Restricting CreateView

[David]

Hi James 

Many thanks for your reply.

David 

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Re: How to add fields to an existing model dynamically? Also how to modify existing field of a model dynamically?

[Christian Ledermann]

you can use a technique from the zope world known as Annotations:
http://davidemoro.blogspot.co.uk/2015/02/kotti-cms-annotations-store-arbitrary-data.html
which basically means that you store additional data in a json field

have a look at:
https://github.com/octobot-dev/pulpo-forms-django
https://github.com/MarkusH/django-dynamic-forms
or https://wagtail.io/


On 31 July 2015 at 04:28, SriPrad  wrote:
> Hi,
> Thanks for the quick response.
> I understand that it is not typical to have dynamic model.
> However the requirements I have need to allow the admin to make changes/ 
> create models dynamically.
> I have looked at South library. However my understanding is that it is not 
> supported for Django 1.7 and later versions. It seems that the functionality 
> is merged in Django 1.7.
>
> Please advise.
>
> Regards,
> Srinivasa Pradeep
>
>
>
> On Thursday, July 30, 2015 at 5:08:07 PM UTC+5:30, vicherot wrote:
>> IMHO (maybe i'm wrong) i think that its not quite good modify your database 
>> structure dynamically to often, maybe you must to think a better design of 
>> your model.
>> I'm working on a Health bussiness in Argentina and never need to
>> change the database structure to modify a medical form. (for now)
>>
>>
>> Now, for your exclusive problem, maybe using south (just like the project 
>> you say) you can do the changes to your database dinamically.
>>
>> Regards!
>>
>>
>>
>>
>>
>> --
>> Rafael E. Ferrero
>>
>>
>>
>> 2015-07-30 5:01 GMT-03:00 SriPrad :
>>
>> Hi,
>> I am new to Django and Python!.
>> I am using Django 1.8.3 along with Python 3.2 and using sqlite as the 
>> database.
>> I am trying to setup a site using Django wherein the model is created 
>> dynamically( For eg: a Medical form)
>> The fields of the form are stored in db and the model created dynamically 
>> (reference: https://github.com/willhardy/dynamic-models)
>> The admin guys can modify the fields of this medical form from the admin 
>> site. At this time, I would like to modify the model to match the schema 
>> modifications done by admin guys.
>> I understand prior  to Django 1.7, there was django.db.models.loading module 
>> that helped in this.
>>
>> With the current version of Django, how can I add/modify/delete the fields 
>> of the dynamic model dynamically?
>>
>> Your help and suggestions are most welcome.
>>
>> Regards,
>> Srinivasa Pradeep
>>
>>
>>
>>
>>
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<*)))>{

If you save the living environment, the biodiversity that we have left,
you will also automatically save the physical environment, too. But If
you only save the physical environment, you will ultimately lose both.

1) Don’t drive species to extinction

2) Don’t destroy a habitat that species rely on.

3) Don’t change the climate in ways that will result in the above.

}<(((*>

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