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Automatic CRUD urls from your models...

Just extends your models from this One... is abstract so, it will not generate a table. Now, in your urls.py do this: from django.conf.urls.defaults import * from animals.models import Dog, Cat, Bird urlpatterns = patterns('animals.views', url(r'^$', 'index', {},Dog._meta.app_label), ) dog=Dog() cat=Cat() bird=Bird() urlpatterns+=dog.build_generic_CRUD_urls(Dog) urlpatterns+=cat.build_generic_CRUD_urls(Cat) urlpatterns+=bird.build_generic_CRUD_urls(Bird) then you can create the templates, and get the urls like this: {{ object.get_absolute_url }} View {{ object.get_update_url }} Edit {{ object.get_delete_url }} Delete {{ dummy_object.get_create_url }} Create dummy_object is a quick and dirty solution until I find some better... With all these you can create 54 functional and low detail CRUDS in one hour. :D Enjoy!

  • model
  • url
  • generation
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Management command which helps to find temlate files

If you need to customize many default templates from installed apps, this management command will help you to find those templates and to copy them to desired location. Place this code at: management/commands/templates.py To see a list of installed templates, run: python manage.py templates To copy all templates to specified location: python manage.py templates --copy-to ./templates To copy templates from specified applications only: python manage.py templates admin auth --copy-to ./templates

  • management
  • commands
  • command
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Fix for the bad behaviour of GenericForeignKey field

I don't know if you noticed but GenericForeignKey behaves badly in some situations. Particularly if you assign a not yet saved object (without pk) to this field then you save this object the fk_field does not get updated (even upon saving the model)- it's updated only upon assigning object to the field. So you have to save the related object prior to even **assigning** it to this field. It's get even more apparent when you have null=True on the fk/ct_fields, because then the null constrains won't stop you from saving an invalid object. By invalid I mean an object (based on a model with GFK field) which has ct_field set but fk_field=None. Maybe this problem is irrelevant in most use case scenarios but this behaviour certainly isn't logical and can introduce silent bugs to your code.

  • genericforeignkey
  • contenttypes
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Drag and drop ordering of admin list elements for Grappelli

Adds drag-and-drop ordering of rows in the admin list view for [Grappelli](http://code.google.com/p/django-grappelli/). This is based on [Snippet #2057](http://djangosnippets.org/snippets/2057/) and fixes some bugs as well as switching to jQuery/jQuery UI provided by Grappelli. No additional files need to be installed. The model needs to have a field holding the position and that field has to be made list_editable in the ModelAdmin. The changes of the ordering are applied after clicking 'Save'.

  • admin
  • sort
  • jquery
  • order
  • sortable
  • grappelli
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orm_tools

This module contains classes that add new behavior to Django's ORM. Classes include: **Session** * Forces QuerySet objects to return identical instances when objects with the same primary key are queried. * Similar to [SQLAlchemy Session](http://www.sqlalchemy.org/docs/orm/session.html) **GraphSaver** * Save entire object graphs at once. * Automatically detects object dependencies and saves them in the correct order. **Collection** * Easier one-to-many relationships. Instructions and more information on [limscoder.com](http://www.limscoder.com/2011/01/django-orm-tools.html).

  • session
  • db
  • orm
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path.py FilePathField

A slightly adapted FilePathField that converts path.py (http://pypi.python.org/pypi/path.py) objects into strings and back from the database.

  • custom field
  • filepathfield
  • path.py
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Modifying the fields of a third/existing model class

You can extend the class **ModifiedModel** to set new fields, replace existing or exclude any fields from a model class without patch or change the original code. **my_app/models.py** from django.db import models class CustomerType(models.Model): name = models.CharField(max_length=50) def __unicode__(self): return self.name class Customer(models.Model): name = models.CharField(max_length=50) type = models.ForeignKey('CustomerType') is_active = models.BooleanField(default=True, blank=True) employer = models.CharField(max_length=100) def __unicode__(self): return self.name **another_app/models.py** from django.db import models from django.contrib.auth.models import User from this_snippet import ModifiedModel class City(models.Model): name = models.CharField(max_length=50) def __unicode__(self): return self.name class HelperCustomerType(ModifiedModel): class Meta: model = 'my_app.CustomerType' description = models.TextField() class HelperCustomer(ModifiedModel): class Meta: model = 'my_app.Customer' exclude = ('employer',) type = models.CharField(max_length=50) # Replaced address = models.CharField(max_length=100) city = models.ForeignKey(City) def __unicode__(self): return '%s - %s'%(self.pk, self.name) class HelperUser(ModifiedModel): class Meta: model = User website = models.URLField(blank=True, verify_exists=False)

  • fields
  • model
  • helper
  • change
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model instance to sql insert statement

This function will take a model instance and return an insert statement for it. I use it for extracting a subset of my production data so that I can reproduce problems in a local environment. The quoting is for mysql, you may have to change it depending on your db backend. Also, it assumes the 'default' database.

  • sql
  • model
  • db
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cleat_list

Clear list from unwanted elements, within django template.

  • template
  • filter
  • list
  • clear
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View to retrieve objects meeting a complex tag query

This view parses complex tag queries. It generates a list of model instances matching an expression of tags. The expression currently supports intersection, union and subtraction. Expressions can also be put in parenthesis and then combined with other expressions. The expression must be passed to this view in the tag_expression argument. In my application this is simply passed from the URL querystring. This snippet uses the django-tagging app. It assumes that tags are composed of alphanumeric characters, underscores, hyphens and spaces, but the django-tagging application allows tags with other characters, so you might either want to restrict users to using tags that only contain the above characters, or you might prefer to improve this snippet. Example: This URL http://example.com/people/?(deceased&parrot)|"Monty Python" will retrieve all people who are either deceased parrots or members of Monty Python. In the tag_expression argument: * ALL is treated as a keyword. If you happen (by some sad chance) to have a tag called ALL and want to use it in the expression, surround it in quotation marks. E.g. "ALL" * Examples: - famous -returns all instances of the model tagged with famous - famous&deceased -returns all instances of the model tagged both famous and deceased. - famous|deceased -returns all instances of the model tagged famous or deceased. - parrot-deceased -returns all alive parrots in the model. - ALL-deceased -returns all instances of the model that are not tagged deceased. - ALL -returns all instances of the model - "ALL" -returns all instances of the model that are tagged ALL - "great author"&deceased -returns all models tagged as great authors and deceased. Arguments: * request -- HTTP Request object * tag_expression -- a set expression of tags, supporting intersection, union, parenthesis and difference * app_name -- App for the model we're working on (defaults to pubman) * model_name -- Model on which to apply the set operations (defaults to Article) * view -- view to redirect to after the model instance list has been constructed * html_template -- HTML template to redirect (defaults to 'pubman/tag.html')

  • view
  • django-tagging
  • tag expression
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Expose filtered settings to templates request context

**Warning**: I'm quite sure this is **not** a best practice, but this snippet has proven being very useful to me. Handle with care. I also wonder about the impact on performance, while I didn't notice any slowdown on a very small app of mine. Idea is to expose project settings to template request context through a context processor, and \__doc__ should be self-explanatory. Of course, if you know a better way to achieve the purpose, please tell in the comments.

  • templates
  • settings
  • python
  • context_processor
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