django-models

Django ORM and multiprocessing

Hi, I am using Django ORM in my python script in a decoupled fashion i.e. it's not running in context of a normal Django Project. I am also using the multi processing module. And different process in turn are making queries. The process ran successfully for an hr and exited with this message "IOError: [Errno 32] Broken pipe" Upon ...

How to Remove or Disable username for users in Django ?

Hi at all, Is there a way to completly remove or disable username in Django ? I want to use only email and password. . Thanks ^_^ ...

Using Models and Forms outside of Django?

Is it possible to run a view file using Django Model and Form outside of the Django environment? ...

Django shows too many warnings when deleting an object

Hello! I have two models: class Account(models.Model): main_request = models.ForeignKey('JournalistRequest', related_name='main_request') key = models.CharField(_('Key'), max_length=100) class JournalistRequest(models.Model): account = models.ForeignKey(Account, blank=True, null=True) When I try to delete a JournalistReq...

Django: Only one of two fields can be filled in

I have this model: class Journals(models.Model): jid = models.AutoField(primary_key=True) code = models.CharField("Code", max_length=50) name = models.CharField("Name", max_length=2000) publisher = models.CharField("Publisher", max_length=2000) price_euro = models.CharField("Euro", max_length=2000) price_dollars ...

How to filter Many2Many / Generic Relations properly with Q?

Hi, I have 3 Models, the TaggedObject has a GenericRelation with the ObjectTagBridge. And the ObjectTagBridge has a ForeignKey to the Tag Model. class TaggedObject(models.Model): """ class that represent a tagged object """ tags = generic.GenericRelation('ObjectTagBridge', blank=Tr...

Access to related Objects inside a model propery

Hi, I just run into some problems with django models. Example code is better than any word: class Cart(models.Model): updated_at = models.DateTimeField(auto_now=True) created_at = models.DateTimeField(auto_now_add=True) def __unicode__(self): return u'date %s;'%(self.created_at) def __str__(self): retu...

Invalidating Memcached Keys on save() in Django

I've got a view in Django that uses memcached to cache data for the more highly trafficked views that rely on a relatively static set of data. The key word is relatively: I need invalidate the memcached key for that particular URL's data when it's changed in the database. To be as clear as possible, here's the meat an' potatoes of the vi...

Django shopping app?

We are developing a django app for several restaurants, it's like a shopping chart. We need the restaurant admins to be able to create their own restaurants, menus and products, and clients must be able to browse the menus and choose the products and confirm their delivery, like a shopping app, which is the best approach? Are there djan...

create_or_update in ModelForm

I want to have a ModelForm that can create_or_update a model instance based on the request parameters. I've been trying to cobble something together, but am realizing that my python fu is not strong enough, and the ModelForm implementation code is a quite hairy. I found this update_or_create snipplet for working with a Model, but I thi...

Use Django dumpdata to dump a subset of overall data?

I'm trying to use dumpdata to generate JSON for a database that is sufficiently large for django to take a long, long time to output. Is there any way to dump only a subset of the fields; say, 100, for testing? I'm using MySQL and Django 1.0. ...

Joining different models in Django

Let's say I have this data model: class Workflow(models.Model): ... class Command(models.Model): workflow = models.ForeignKey(Workflow) ... class Job(models.Model): command = models.ForeignKey(Command) ... Suppose somewhere I want to loop through all the Workflow objects, and for each workflow I want to loop through its Co...

django deleting models and overriding delete method

I have 2 models class Vhost(models.Model): dns = models.ForeignKey(DNS) user = models.ForeignKey(User) extra = models.TextField() class ApplicationInstalled(models.Model): user = models.ForeignKey(User) added = models.DateTimeField(auto_now_add=True) app = models.ForeignKey(Application) ver = models.Foreign...

Numerology with Python And Django

Hi guys, i have a function that give me the result that im expecting in console mode, but if i try to use the function with Django, the page never load and just have a loop calculating and never end. Any idea ? *sorry with my english Console function (WORK GREAT): def sum_digitos(n): sum = 0; while n != 0: sum += n % ...

Manually listing objects in Django (problem with field ordering)

I'm having some trouble figuring out the best/Djangoic way to do this. I'm creating something like an interactive textbook. It has modules, which are more or less like chapters. Each module page needs to list the topics in that module, grouped into sections. My question is how I can ensure that they list in the correct order in the temp...

How do I check for Existence of a Record in GAE

I am trying to create a simple view in Django & GAE, which will check if the user has a profile entity and prints a different message for each case. I have the program below, but somehow GAE always seem to return a object. My program is below import datetime from django.http import HttpResponse, HttpResponseRedirect from google.appengi...

In django, how can I include some default records in my models.py?

If I have a models.py like class WidgetType(models.Model): name = models.CharField(max_length=200) class Widget(models.Model): typeid = models.ForeignKey(WidgetType) data = models.CharField(max_length=200) How can I build in a set of built in constant values for WidgetType when I know I'm only going to have a certain f...

Reordering fields in Django model

I want to add few fields to every model in my django application. This time it's created_at, updated_at and notes. Duplicating code for every of 20+ models seems dumb. So, I decided to use abstract base class which would add these fields. The problem is that fields inherited from abstract base class come first in the field list in ad...

Problem trying to achieve a join using the `comments` contrib in Django

Hi, Django rookie here. I have this model, comments are managed with the django_comments contrib: class Fortune(models.Model): author = models.CharField(max_length=45, blank=False) title = models.CharField(max_length=200, blank=False) slug = models.SlugField(_('slug'), db_index=True, max_length=255, unique_for_date='pub_dat...

Using functions in models to dynamically fill fields on object creation in Django

Within Django, can a function local to a model be called on object creation to dynamically fill a field? class someModel(models.Model): id = models.FloatField(primary_key=True, default=generate_id()) def generate_id(self): newId=time.time() return newId So far I haven't had any luck with getting it to work or ...