Django talk: April 2013

Tuesday, April 30, 2013

Re: Getting error on first step of tutorial

No, I never figured it out. I deleted version 1.5 and specified version 1.4 for the installation. The same tutorial steps worked ok under version 1.4 so I gave up on 1.5 and just used 1.4. Prior to that I had set up a virtualenv with a 1.5 installation and that failed the same way, so I assume that it wasn't due to any other packages I had installed in my system python. Also, version 1.5 worked ok on my Linux box so maybe it is something specific to a Windows installation.

Sorry,
Dennis

On Thursday, April 25, 2013 6:55:33 PM UTC-6, A. Dias wrote:

Hey Dennis!

Have you figured out an answer for that one yet? cause i'm dealing with the exact same error and it would be great if you had a solution for it!

Cheers,
Alex

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Re: question about django tutorial

Try:

python manage.py syncdb

If you have set up the rest of your project with the admin stuff, then this should create the tables for you.

Then run

python manage.py runserver again.

Mark :)

On Tue, Apr 30, 2013 at 1:45 PM, Christopher Spears <cspears2002@yahoo.com> wrote:

Hi!

I am a Django newbie, so please bear with me. I am working on part 2 of the Django tutorial.

I started my server with the following:
python manage.py runserver
Then I logged into my admin site.

Earlier in the tutorial, I had created a model called Polls. I selected Polls from the Site administration menu and then selected the 'What's up?' version of Polls to change. However, when I clicked on the 'Save and Continue Editing' Button, I got this traceback:

Environment:

Request Method: POST
Request URL: http://127.0.0.1:8000/admin/polls/poll/1/

Django Version: 1.5.1
Python Version: 2.7.4
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'polls')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware')

Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in get_response
115.                         response = callback(request, *callback_args, **callback_kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in wrapper
372.                 return self.admin_site.admin_view(view)(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
91.                     response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func
89.         response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\sites.py" in inner
202.             return view(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapper
25.             return bound_func(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
91.                     response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in bound_func
21.                 return func(self, *args2, **kwargs2)
File "C:\Python27\lib\site-packages\django\db\transaction.py" in inner
223.                 return func(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in change_view
1108.                 self.log_change(request, new_object, change_message)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in log_change
546.             change_message = message
File "C:\Python27\lib\site-packages\django\contrib\admin\models.py" in log_action
19.         e.save()
File "C:\Python27\lib\site-packages\django\db\models\base.py" in save
546.                        force_update=force_update, update_fields=update_fields)
File "C:\Python27\lib\site-packages\django\db\models\base.py" in save_base
650.                 result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "C:\Python27\lib\site-packages\django\db\models\manager.py" in _insert
215.         return insert_query(self.model, objs, fields, **kwargs)
File "C:\Python27\lib\site-packages\django\db\models\query.py" in insert_query
1661.     return query.get_compiler(using=using).execute_sql(return_id)
File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
937.             cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\util.py" in execute
41.             return self.cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\base.py" in execute
366.             six.reraise(utils.DatabaseError, utils.DatabaseError(*tuple(e.args)), sys.exc_info()[2])
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\base.py" in execute
362.             return Database.Cursor.execute(self, query, params)

Exception Type: DatabaseError at /admin/polls/poll/1/
Exception Value: no such table: django_admin_log

Was I supposed to set up this table earlier in the tutorial? When I went back in the tutorial, I didn't see any mention of it. I am working on a Windows laptop.

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Mark :)

question about django tutorial

Hi!

I am a Django newbie, so please bear with me. I am working on part 2 of the Django tutorial.

I started my server with the following:

python manage.py runserver

Then I logged into my admin site.

Earlier in the tutorial, I had created a model called Polls. I selected Polls from the Site administration menu and then selected the 'What's up?' version of Polls to change. However, when I clicked on the 'Save and Continue Editing' Button, I got this traceback:

Environment:

Request Method: POST
Request URL: http://127.0.0.1:8000/admin/polls/poll/1/

Django Version: 1.5.1
Python Version: 2.7.4
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'polls')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware')

Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in get_response
115.                         response = callback(request, *callback_args, **callback_kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in wrapper
372.                 return self.admin_site.admin_view(view)(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
91.                     response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func
89.         response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\sites.py" in inner
202.             return view(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapper
25.             return bound_func(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
91.                     response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in bound_func
21.                 return func(self, *args2, **kwargs2)
File "C:\Python27\lib\site-packages\django\db\transaction.py" in inner
223.                 return func(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in change_view
1108.                 self.log_change(request, new_object, change_message)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in log_change
546.             change_message = message
File "C:\Python27\lib\site-packages\django\contrib\admin\models.py" in log_action
19.         e.save()
File "C:\Python27\lib\site-packages\django\db\models\base.py" in save
546.                        force_update=force_update, update_fields=update_fields)
File "C:\Python27\lib\site-packages\django\db\models\base.py" in save_base
650.                 result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "C:\Python27\lib\site-packages\django\db\models\manager.py" in _insert
215.         return insert_query(self.model, objs, fields, **kwargs)
File "C:\Python27\lib\site-packages\django\db\models\query.py" in insert_query
1661.     return query.get_compiler(using=using).execute_sql(return_id)
File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
937.             cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\util.py" in execute
41.             return self.cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\base.py" in execute
366.             six.reraise(utils.DatabaseError, utils.DatabaseError(*tuple(e.args)), sys.exc_info()[2])
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\base.py" in execute
362.             return Database.Cursor.execute(self, query, params)

Exception Type: DatabaseError at /admin/polls/poll/1/
Exception Value: no such table: django_admin_log

Was I supposed to set up this table earlier in the tutorial? When I went back in the tutorial, I didn't see any mention of it. I am working on a Windows laptop.

Re: Using Django and R in a production environment?

Thanks Nick; RStudio looks like a really good tool for development work.

The impression I get though, is that the server is designed for allowing interactive R sessions over the web; whereas for us Django is the primary requirement and calls to R should happen "behind the scenes".

On Tuesday, 30 April 2013 15:43:01 UTC+2, Nick Santos wrote:

Is Django a hard and fast requirement? If so, is it just about integrating the routines? I think otherwise something like RStudio Server would work for you. I've deployed it previously and it was a pretty nice setup. It's based on Unix user accounts, so R processes run as if users were running them on a desktop, except not. You may be able to share code in this environment too, but I haven't played with it a ton.

http://www.rstudio.com/ide/docs/server/getting_started

-Nick

On Tue, Apr 30, 2013 at 12:06 AM, Derek <game...@gmail.com> wrote:

" if you write your own R analysis routines, why have them run in a web system"

Two issues here:

1. We are writing R routines for someone else; who needs 'analysis on demand'
2. A web system means that multiple users in multiple locations can all readily access the same analysis routines (but with different data sets)

I agree that if you work on a desktop, with no need to access shared data or use the same analysis routines as anyone else, then a web interface makes no sense.

Basically we are trying to harness two disparate systems; each of which is very powerful in their own sphere, to create an application that is really useful for better and more efficient science.

On 29 April 2013 16:59, Javier Guerra Giraldez <jav...@guerrag.com> wrote:

On Mon, Apr 29, 2013 at 2:13 AM, Derek <game...@gmail.com> wrote:
> hat no one is actually using R in a production environment themselves (which
> is a little surprising to me).

well R itself is widely used in production... but the intersection
with Django is very small. (after all, if you write your own R
analysis routines, why have them run in a web system)

--
Javier

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Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

You're welcome. You may be new to it, but you ask better questions than most I see. When I see "How do I do X?" I usually ignore it. When I see "Here's what I did. It's not working for some reason" then I try to help if I can. Keep up the good work.

Shawn

Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

On Tue, Apr 30, 2013 at 2:22 PM, <7equivalents@gmail.com> wrote:
> "Redirect" Is that what you kids are calling it nowdays..

i found that word in RFC 1945, by Tim Berners-Lee and others, May
1996, where HTTP/1.0 was defined.

hardly a new term in web lingo.

--
Javier

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Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

"Redirect" Is that what you kids are calling it nowdays.. Thanks, that was the terminology I was lacking. That works.... I'm learning html, javascript, and Django all together on the fly so I'm not well versed in basics. Thankyou for your help! It helped clear up the puzzle a bit.

Re: noob "hello world" problem with URLconf

^ is only start with hello. it may be your issues in urls.py

Karl

Programmer at Olivet Institute of Technology

http://oit.olivetuniversity.edu/

在 2013年4月30日星期二UTC-4下午1时25分41秒，lev...@gmail.com写道：

what´s up everyone. I just installed Django for the first time, leaving php in the closet for a while.

My problem is concerning the url patterns. I´ve pasted the example "Hello world" code directly from the django book to urls.py and views.py so I´ll leave out all extra code since it has something to do with my configuration.

http://www.djangobook.com/en/2.0/chapter03.html

This works:
url(r'hello/$', hello),

This doesn´t:
url(r'^hello/$', hello),

Hopefully someone can help.

N

Admin shows all users as staff and super user

Hi everyone,

My very first question here. I hope anyone can help me out with this...

I have created a Django powered site for my company. Everything works perfectly, except in our production environment,
where I have one bug in the admin that is quite annoying:

When I click a user to edit it, the "Staff" and "SuperUser" checkboxes are always checked for every user, even when they
shouldn't be. The database however does record these properties properly, and they work correctly in the application. Only
the admin is displaying them incorrectly in the "edit" page for a user. When looking at the user overview in the admin, the
"staff" property is correctly displayed.

Because of this error we need to be extra cautious when editing users, because we don't accidentally want to make anyone
a staff or superuser.

Does anyone know how I can attempt to debug this? Where should I start?

I am running:
Django 1.5.1 on Ubuntu 12.04 with SQL Server 2008R2 as my database (via pyodbc->UnixODBC->FreeTDS).

Thanks in advance for any hints you can provide!

Kind regards,
Thomas

Re: noob "hello world" problem with URLconf

Hi. Can you please post your full urls.py?

2013/4/30 <levito@gmail.com>

what´s up everyone. I just installed Django for the first time, leaving php in the closet for a while.

My problem is concerning the url patterns. I´ve pasted the example "Hello world" code directly from the django book to urls.py and views.py so I´ll leave out all extra code since it has something to do with my configuration.

http://www.djangobook.com/en/2.0/chapter03.html

This works:
url(r'hello/$', hello),

This doesn´t:
url(r'^hello/$', hello),

Hopefully someone can help.

N

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Multi-tenant database model with new user model?

Hi,

We have old model for one of my django application that requires
multi-tenant deployment. The database model I came up with is kind of
_ugly_ to support the multi-tenancy.

Are there any good examples of how one can write multi-tenant django
application using the new AbstractUser classes?

-Subodh

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noob "hello world" problem with URLconf

what´s up everyone. I just installed Django for the first time, leaving php in the closet for a while.

My problem is concerning the url patterns. I´ve pasted the example "Hello world" code directly from the django book to urls.py and views.py so I´ll leave out all extra code since it has something to do with my configuration.

http://www.djangobook.com/en/2.0/chapter03.html

This works:

url(r'hello/$', hello),

This doesn´t:

url(r'^hello/$', hello),

Hopefully someone can help.

Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

If I understand your question and your code properly, the problem is that you are expecting a redirect, but what's happening is that the raw HTML from the view is being returned to your JavaScript function, which does nothing with it.

It seems like what you should do is just do a normal HTML form with an "action" tag that just redirects to your view. Since you're not accepting any return values in your JavaScript, you're not doing any "AJAX," so the JavaScript is an unnecessary complication. If you cut out the JavaScript entirely and make your button a normal "submit" button it will have the desired behavior.

Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

Hey guys, I need a little help. Here is what I'm trying to do.
I would like to have a html button execute a javascript on click, and the javascript should send an GET reguest to the server which should execute the View for the page requested. For some reason I can't get it to work...

here is what I've done
(1) I have a working View that executes successfully when the main page is requested.
(2) The View loads the template that has the html button and javascript.
(3) I have confirmed the when the button is clicked the javascript executes.

However the page doesn't change to the new page requested, and I get a 404 error.... however, the page is there and I link to it from other places in the code.

Maybe I misunderstand something in the way the request and load and ajax stuff works, I'm still a novice.

Here is my code...

//////////////////////// html & javascript ////////////////////////////////////
<script type='text/javascript'>
$(function (){
$("#blog1").click(function (){
    var id = $( "#blog1" ).val();
    var data = { id:id };
    $("#blog1").prop('value', 'works');
    $.get({
      url:"/control/"
    });
});
return false;
});
</script>
//////////////////////////////////////////////////////////////////////////////////////

/////////////////// View /////////////////////////////////////////////////////////
def control_page(request):

sliderB = Slider.objects.get(sliderID=1)
sliderR = Slider.objects.get(sliderID=2)
sliderG = Slider.objects.get(sliderID=3)
sliderP = Slider.objects.get(sliderID=4)
preprogram1 = Preprogram.objects.get(preprogramID=1)
preprogram2 = Preprogram.objects.get(preprogramID=2)
preprogram3 = Preprogram.objects.get(preprogramID=3)
pin1 = Pin.objects.get(pinID=1)
variables = RequestContext(request, {'pin1': pin1, 'preprogram1': preprogram1, 'preprogram2': preprogram2, 'preprogram3': preprogram3, 'sliderB':sliderB, 'sliderR':sliderR, 'sliderG':sliderG, 'sliderP':sliderP})
return render_to_response('control_page.html', variables)
/////////////////////////////////////////////////////////////////////////////////////

/////////////////////////// urls ///////////////////////////////////////////////////
urlpatterns = patterns('',
(r'^$', main_page),
(r'^media/(?P<path>.*)$', 'django.views.static.serve', {'document_root': settings.MEDIA_ROOT}),
(r'^login/$', 'django.contrib.auth.views.login'),
(r'^logout/$', logout_page),
(r'^user/(\w+)/$', user_page),
(r'^control/$', control_page),
(r'^gpio_control/$', gpio_control_page),
(r'^slider/$', slider_page),
(r'^read_more/$', read_more_page),
(r'^admin/', include(admin.site.urls)),

)///////////////////////////////////////////////////////////////////////////////////////////

Re: Blog writen by django?

don't forget the django-cms project

https://www.django-cms.org/https://www.django-cms.org/

On Monday, April 29, 2013 5:05:00 PM UTC-3, gilberto dos santos alves wrote:

mezzanine is spetacular. thanks! ;>). and plug and run.

Em segunda-feira, 29 de abril de 2013 00h50min42s UTC-3, Russell Keith-Magee escreveu:

Here's a site that lists a whole lot of options:

https://www.djangopackages.com/grids/g/blogs/

DjangoPackages is well worth bookmarking -- it's a good archive of Django packages for a wide range of website features, not just blogs.

Yours,
Russ Magee %-)

On Mon, Apr 29, 2013 at 11:22 AM, gilberto dos santos alves <gsa...@gmail.com> wrote:

please could you point some one because this url [1], and this url [2] have conceptual problems and not only mistype error.
while this i am update docs for url [1], but it shows very poor html display and models.

url:: [1] http://www.djangorocks.com/tutorials/how-to-create-a-basic-blog-in-django/

url:: [2] http://lightbird.net/dbe/blog.html

For all of us following tutorials on django home this sounds like people have others important things to do. but we need tutorials for all people that have method of learning things follow tutorials not guess tutorial!

thanks for your time.

Em sábado, 27 de abril de 2013 22h54min56s UTC-3, Shawn Milochik escreveu:

Do a Google search. There are thousands.

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Problem enconding

I have a problem in my application that I am not able to solve, which is as follows:

In my application I have the option of entering the bd data from a csv file, is part is ok, the problem is that the data come in csv utf-8 and I compare with data that will seek to mongodb that come in latin iso or do not know well.

I'll fetch the genres of movies and save it for later if there is already comparing the genre of the movie or not and then insert.

But when you'll get the mongo station like this: Com \ \ xe9dia

And those who come in csv station like this: Com \ \ xc3 \ \ xa9dia

This for the Comedy genre.

How can I solve this problem?

My code is here:

Código (Python):

def csv_upload(request):
        if request.method == 'POST':
                gen = Genre.objects.all()
                genres = dict(Genre.objects.all().values_list('GenreType', 'id'))
                print genres
                for obj in gen:
                        genres[obj.GenreType] = obj.id
                  
                file = request.FILES['file']  
                dialect = csv_mod.Sniffer().sniff(codecs.EncodedFile(file,"utf-8").read(1024))
                file.open()
                csv = csv_mod.DictReader( codecs.EncodedFile(file,"utf-8"), dialect=dialect )
                for line in csv:                          
                        report = Movie()
                  
                        genall = line["IdGenre"].split(',')
                        print genall
                        movieGenres = []
                  
                        for cc in genall:
                                if not cc in genres:
                                        rep = Genre()
                                        rep.GenreType = cc
                                        rep.save()
                          
                                        genres[rep.GenreType] = rep.id;
                                movieGenres.append(genres[cc])
                          
                        report.MovieTitle = line["MovieTitle"]
                        report.IdGenre = movieGenres
                        report.MovieYear = line["MovieYear"]
                        report.MovieDuration = line["MovieDuration"]
                        report.save()
        return render_to_response('index.html', {},
                                                          context_instance=RequestContext(request))

Need to hire a Senior Django Web Architect

All,

We have a great client in downtown DC. They need a Django architect to help them.

Our client is a well known brand name company in the consumer media industry. The ideal candidate will have experience working with consumer facing websites, would not be afraid of Web Services, and has experience with CMS's. The ideal candidate should be comfortable working within a team, as well as working independently to develop a solution.

This would be a full time employee position working directly for our client. The salary level is $120,000 - $140,000/yr.

Please let me know if you're interested, and we can chat.

Sincerely,
Andy Nussbaum
====================================================

Our client is looking for qualified candidates for a Web Architect position. The successful candidate will be a charismatic leader and passionate web architect with a proven track record building highly scalable Internet-based products. You will be responsible for driving the rapid evolution of our clients' software architecture for Search, Video, Content Management and Registration. The position is part of a proven team of architects that is looking to increase its depth. Please consider applying even if you are not knowledgeable in all areas mentioned below.

Responsibilities:

Define architecture for web enabled systems including CMS, Search, Streaming Video, Identity Management and Community.

Integrate internal and external systems. Provide leadership on cloud based strategy.

Define Service Oriented Architecture (SOA) and RESTful APIs to expose content, authentication, community, and messaging services for internal and 3^rd party developers.

Working with the development team, the hire will develop and maintain a roadmap of architectural improvements and API rollouts.

Evaluate and work closely with 3^rd party development companies.

Experience:

Undergraduate degree in Computer Science, Information Technology, Software Engineering or similar field desired.

- 8 years work experience in progressively responsible technical role.

- Extensive experience with service oriented architectures.

- Experience supporting a media business is a plus

Knowledge and Skill Requirements:

8+ years total relevant experience

Defining systems architecture with emphasis on integrating existing systems and web-based services

Building products that get deployed and scale

Recognized as an expert practitioner

3+ years of hands-on experience as an system architect

Experience with:

Building software development environments that work
Python and Django experience
API Definition and deployment
Experience with Registration , SAML, oAuth and Active Directory.
Experience with CMS systems
Search, including Elastic Search
Streaming video experience a plus
Partner integration through open and proprietary Internet interfaces
Content and data migration
Ability to instill a culture of friendly competitiveness that drives high quality and few software defects
Excellent communication and writing skills
Understandable by non-technology staff
Presentable to partners and clients

Re: Using Django and R in a production environment?

Is Django a hard and fast requirement? If so, is it just about integrating the routines? I think otherwise something like RStudio Server would work for you. I've deployed it previously and it was a pretty nice setup. It's based on Unix user accounts, so R processes run as if users were running them on a desktop, except not. You may be able to share code in this environment too, but I haven't played with it a ton.

http://www.rstudio.com/ide/docs/server/getting_started

-Nick

On Tue, Apr 30, 2013 at 12:06 AM, Derek <gamesbook@gmail.com> wrote:

" if you write your own R analysis routines, why have them run in a web system"

Two issues here:

1. We are writing R routines for someone else; who needs 'analysis on demand'
2. A web system means that multiple users in multiple locations can all readily access the same analysis routines (but with different data sets)

I agree that if you work on a desktop, with no need to access shared data or use the same analysis routines as anyone else, then a web interface makes no sense.

Basically we are trying to harness two disparate systems; each of which is very powerful in their own sphere, to create an application that is really useful for better and more efficient science.

On 29 April 2013 16:59, Javier Guerra Giraldez <javier@guerrag.com> wrote:

On Mon, Apr 29, 2013 at 2:13 AM, Derek <gamesbook@gmail.com> wrote:
> hat no one is actually using R in a production environment themselves (which
> is a little surprising to me).

well R itself is widely used in production... but the intersection
with Django is very small. (after all, if you write your own R
analysis routines, why have them run in a web system)

--
Javier

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Re: Using Django and R in a production environment?

" if you write your own R analysis routines, why have them run in a web system"

Two issues here:

1. We are writing R routines for someone else; who needs 'analysis on demand'

2. A web system means that multiple users in multiple locations can all readily access the same analysis routines (but with different data sets)

I agree that if you work on a desktop, with no need to access shared data or use the same analysis routines as anyone else, then a web interface makes no sense.

Basically we are trying to harness two disparate systems; each of which is very powerful in their own sphere, to create an application that is really useful for better and more efficient science.

On 29 April 2013 16:59, Javier Guerra Giraldez <javier@guerrag.com> wrote:

On Mon, Apr 29, 2013 at 2:13 AM, Derek <gamesbook@gmail.com> wrote:
> hat no one is actually using R in a production environment themselves (which
> is a little surprising to me).

well R itself is widely used in production... but the intersection
with Django is very small. (after all, if you write your own R
analysis routines, why have them run in a web system)

--
Javier

Monday, April 29, 2013

AttributeError: 'AlumniResponseFormFormSet' object has no attribute 'new_objects'

I'm using the Django admin and trying to make some changes to a related object that is mapped as anInlineModelAdmin object. I'm trying to do this using the save_related(self, request, form, formsets, change) method that Django provides. When I try to save something, I get an error:

AttributeError: 'AlumniResponseFormFormSet' object has no attribute 'new_objects'

Other Info:

1) I have two InlineModelAdmins
2) I'm not saving the AlumniResponseInline when this error occurs. I'm saving another InlineModelAdmin associated with the same parent model
3) Until I added the save_related() method, I wasn't having problems saving either InlineModelAdmin
4) This error is happening after all my code is executed in save_related(), so I don't have control over catching that exception

From the documentation on save_related():

The save_related method is given the HttpRequest, the parent ModelForm instance, the list of inline formsets and a boolean value based on whether the parent is being added or changed. Here you can do any pre- or post-save operations for objects related to the parent. Note that at this point the parent object and its form have already been saved.

Thanks for your time!

Brian Dant

PS: I crossed posted this from SO, where I wasn't getting much traction. I realized that this is probably more of a Django Admin detail, so y'all might know better :D

Re: I need help doing a linked lookup in admin

I'm getting closer!

First I found this note in the Content Types docs that explains why what I was doing does NOT work:
https://docs.djangoproject.com/en/1.4/ref/contrib/contenttypes/#django.contrib.contenttypes.generic.GenericForeignKey

Due to the way GenericForeignKey is implemented, you cannot use such fields directly with filters (filter() and exclude(), for example) via the database API.

Then I found this sample code in the admin docs:
https://docs.djangoproject.com/en/1.4/ref/contrib/admin/#django.contrib.admin.ModelAdmin.formfield_for_foreignkey

That I adapted to this for my admin form:
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "ship_to":
            kwargs["queryset"] = StreetAddress.objects.filter(po__supplier__street_address__location="shipto")
        return super(POAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)

Note that while this is my "PO" data model, I used the model belonging to the address data "StreetAddress". This is because which model does the object.filter() is the one whose __unicode__ function is called to get a representation of each record found for the list selection dialogue. Which means, for my PO database, it describes each address by its PO number (which are the same number) making it hard to tell the addresses apart! By using the StreetAddress model, it uses its __unicode__ instead, which makes a mini-summary of each address. Much clearer.

This is not a perfect solution though because when I try to SAVE an edited PO record I get an error:

MultipleObjectsReturned: get() returned more than one StreetAddress -- it returned 2! Lookup parameters were {'id': u'2'}

I'm going to go back to letting it list all "ship to" addresses for all companies until I figure out what this error even means!

Another problem is its listing both address choices with the same description. Another mystery to ponder.

Re: Blog writen by django?

mezzanine is spetacular. thanks! ;>). and plug and run.

Em segunda-feira, 29 de abril de 2013 00h50min42s UTC-3, Russell Keith-Magee escreveu:

Here's a site that lists a whole lot of options:

https://www.djangopackages.com/grids/g/blogs/

DjangoPackages is well worth bookmarking -- it's a good archive of Django packages for a wide range of website features, not just blogs.

Yours,
Russ Magee %-)

On Mon, Apr 29, 2013 at 11:22 AM, gilberto dos santos alves <gsa...@gmail.com> wrote:

please could you point some one because this url [1], and this url [2] have conceptual problems and not only mistype error.
while this i am update docs for url [1], but it shows very poor html display and models.

url:: [1] http://www.djangorocks.com/tutorials/how-to-create-a-basic-blog-in-django/

url:: [2] http://lightbird.net/dbe/blog.html

For all of us following tutorials on django home this sounds like people have others important things to do. but we need tutorials for all people that have method of learning things follow tutorials not guess tutorial!

thanks for your time.

Em sábado, 27 de abril de 2013 22h54min56s UTC-3, Shawn Milochik escreveu:

Do a Google search. There are thousands.

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Re: Little help needed writing models for star-ratings app

I reiterate: Please read the ORM documentation. That will answer all of your questions. Once you understand how to do queries in the ORM (and which queries are easier than others) then you will know how to design your models so that they'll be easy to work with. As you're reading, make notes about how you can aggregate and search across tables/models.

Re: Little help needed writing models for star-ratings app

On Monday, April 29, 2013 10:31:34 PM UTC+5:30, Shawn Milochik wrote:

It looks like you're not looking for a "little help." You're looking for someone to do the work for you.

You'll get the best help if you try something, get stuck, and explain what you tried and what the error is.

Here is the documentation for using the ORM. This is not a snarky response -- I really hope you do read it and learn how to use Django's ORM, which is what you need to answer your own questions.

https://docs.djangoproject.com/en/1.5/ref/models/querysets/

Read that, try some stuff, then ask specific questions when you have problems. You'll get a lot of great help if you do that.

I am not sure but.. my concern is more about "relationships"

How should I be defining Rating model for

counting number of specific ratings it got

user who rated it..

probably, to log the user data

user = models.ForeignKey(User) would work

But counting number of specific ratings it got is the issue!!

Say there is a Book X. Its ratings are by default 0, 0

Now, as the users add ratings, its get added up to the default and its fine..

but how to know who added what ratings? and how many times he changed etc..

would a ManyToMany field with User and Rating would work?

Re: Newbie: trying to get an existing project running on a different machine

Do you have piston installed in the virtualenv where you're trying to test this?

Check for any "local settings" on the production server that it may be using but which aren't available through the repository.

Re: Little help needed writing models for star-ratings app

It looks like you're not looking for a "little help." You're looking for someone to do the work for you.

You'll get the best help if you try something, get stuck, and explain what you tried and what the error is.

Here is the documentation for using the ORM. This is not a snarky response -- I really hope you do read it and learn how to use Django's ORM, which is what you need to answer your own questions.

https://docs.djangoproject.com/en/1.5/ref/models/querysets/

Read that, try some stuff, then ask specific questions when you have problems. You'll get a lot of great help if you do that.

Little help needed writing models for star-ratings app

Here is the story so far

class Rating(models.Model):

positive_rating = models.FloatField(default=0)

negative_rating = models.FloatField(default=0)

class Book(models.Model):

year_pub = models.IntegerField(max_length=4)

category = models.ForeignKey(Category)

rating = models.ForeignKey(Rating)

hash_id = models.CharField(max_length=64, null=True, blank=True)

There are few books. Each will be having 2 types of rating. +ve one and -ve one,

The rating is done using "stars". If +ve rating is done, -ve field will be 0 vice versa.

votes could be simple stored in this way

o = Book.objects.get(pk=1)

o.rating.positive_rating += 2.5

o.rating.save()

Here comes the actual trouble -->

1. How to count the number of ratings

2. How to know which user has voted

3. How to know whether the user has previously voted or not

Typically, how to attach this MyUser (example) model to the Rating Model?

Thanks

Newbie: trying to get an existing project running on a different machine

Hi folks,

I'm a complete newbie to Django and I have to edit a few lines of code in an existing project.

Of course I can't to so on the production machine.

So I'm trying to migrate the existing project onto a new development server. Django is up and running there and I can create sample projects as described in

https://docs.djangoproject.com/en/dev/intro/tutorial01/

. I have transferred the existing project onto the new development server. I can start it there, but when I try to have a look at its index page I get a runtime error:

File "/opt/djangostack-1.4.5-0/apps/django/lib/python2.7/site-packages/django/contrib/admin/sites.py", line 107, in unregister
raise NotRegistered('The model %s is not registered' % model.__name__)
NotRegistered: The model Consumer is not registered

This error happens in admin.py . This file reads:

from django.contrib import admin

import piston.models

admin.site.unregister(piston.models.Consumer)
admin.site.unregister(piston.models.Nonce)
admin.site.unregister(piston.models.Resource)
admin.site.unregister(piston.models.Token)

Now I wonder where the unregistered module might have been registered. I have searched the whole project tree for the string "Consumer" using grep and this string only occurrs in the file I already mentioned.

Any help would be greately appreciated.

Thanks in andvance

Horst

--
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Medienkonzepte http://www.medienkonzepte.de/
Schaafenstr. 25, 50676 Köln, Germany
Tel +49 221 93187015 / Fax +49 221 93187029

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Access request object in a custom template tag

Hello,

I am currently writing a custom template tag and I need to access the request object within the tag code.

When using tag helpers (simple_tag, inclusion_tag and assignment_tag) you can register them with an additional takes_context=True parameter that makes the request object available.

But this does not work with the low level tag decorator:

@register.tag(takes_context=True)  def mytag(parser, token):     ...

raises the exception: tag() got an unexpected keyword argument 'takes_context'

2 questions :

- is there a reason why the tag decorator does accept the takes_context argument ?

- how can I access the template context with this decorator (and thus the request object) ?

Thanks a lot.

Re: handling IntegrityError: Duplicate entry in UserCreationForm

hey guys, got the solution:

for each field to validate, I wrote a validate function:

code snippet:

def clean_<field>:
    try:
        UserProfile.objects.get(phone_num=self.cleaned_data['<field>'])
    except UserProfile.DoesNotExist:
        return self.cleaned_data["<field>"]
    raise forms.ValidationError(("FIELD VALUE already exist"))

On Sat, Apr 27, 2013 at 6:41 PM, isachin <iclcoolster@gmail.com> wrote:

@ Kelly: thank you very much for pointing me to django's source code.

Yes I got that validation done and applied the same code for validation. Below is the snippet :

   profile.serial_num = self.cleaned_data['phone_num']
        try:
            profile._default_manager.get(phone_num=profile.serial_num)
        except UserProfile.DoesNotExist:
            profile.serial_num = profile.phone_num
    raise forms.ValidationError("Phone number already exist")

@ all

Now the next problem is, similar snippet appears in

/site-packages/django/contrib/auth/forms.py

throws an error in the template form itself, but my code only shows up error in django's traceback, how can I bring it to front ?

so that as soon as one fills phone number field it and press submit, it should say 'Phone number already exist'.

m I doing wrong in using UserCreationForm ? or UserProfile. I m using user.get_profile() for profile fields.

On Thu, Apr 25, 2013 at 7:09 PM, Kelly Nicholes <kelbolicious@gmail.com> wrote:

If you ever want to know how the UserCreationForm works, the source is always available not only on your machine but also on
https://github.com/django/django/blob/master/django/contrib/auth/models.py

On Wednesday, April 24, 2013 9:27:39 AM UTC-6, sachin wrote:
Hello,

I m extending my auth user model to add addition entries like phone numbers and emp_id. In the model I m marking both the fields as unique=True.
Form generation is using UserCreationForm. But whenever I try to save same phone number or emp_id it throws

IntegrityError: (1062, "Duplicate entry '447' for key 'phone_num'")

How to handle this error and show it to user during form input?

Also how do the same UserCreationForm validates duplicate entry for username etc ??

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Django talk

Tuesday, April 30, 2013

Re: Getting error on first step of tutorial

Re: question about django tutorial

question about django tutorial

Re: Using Django and R in a production environment?

Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

Re: noob "hello world" problem with URLconf

Admin shows all users as staff and super user

Re: noob "hello world" problem with URLconf

Multi-tenant database model with new user model?

noob "hello world" problem with URLconf

Re: Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

Need explanation of the flow of info between my javascript, my View, and my template, trying to diagnose my current roadblock.

Re: Blog writen by django?

Problem enconding

Need to hire a Senior Django Web Architect

Re: Using Django and R in a production environment?

Re: Using Django and R in a production environment?

Monday, April 29, 2013

AttributeError: 'AlumniResponseFormFormSet' object has no attribute 'new_objects'

Other Info:

Re: I need help doing a linked lookup in admin

Re: Blog writen by django?

Re: Little help needed writing models for star-ratings app

Re: Little help needed writing models for star-ratings app

Re: Newbie: trying to get an existing project running on a different machine

Re: Little help needed writing models for star-ratings app

Little help needed writing models for star-ratings app

Newbie: trying to get an existing project running on a different machine

Access request object in a custom template tag

Re: handling IntegrityError: Duplicate entry in UserCreationForm

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