django-generic-helpers

====================== django-generic-helpers

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The application provides some syntax sugar for working with Django's generic relations <https://docs.djangoproject.com/en/dev/ref/contrib/contenttypes/#generic-relations>_

Installation

Just install the package from PyPI within pip

.. code:: bash

pip install django-generic-helpers

...or pipenv <https://docs.pipenv.org/en/latest/>_

.. code:: bash

pipenv install django-generic-helpers

...or even poetry <https://poetry.eustace.io/>_

.. code:: bash

poetry add django-generic-helpers

That's all. No need to add this into INSTALLED_APPS of your project or something like that.

Usage

That's how did you work with generic relations before:

.. code:: python

# models.py
from django.contrib.contenttypes.fields import GenericForeignKey
from django.contrib.contenttypes.models import ContentType
from django.db import models

class Post(models.Model):
    pass

class Image(models.Model):
     content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
     object_id = models.IntegerField()
     content_object = GenericForeignKey(ct_field='content_type', fk_field='object_id')

# Example of filtering
post = Post.objects.get(pk=1)
images = Image.objects.filter(
    content_type=ContentType.objects.get_for_object(post),
    object_id=post.id
)

Looks verbose a bit, yep? Let's rewrite this with django-generic-helpers

.. code:: python

# models.py
from django.db import models
from generic_helpers.fields import GenericRelationField

class Post(models.Model):
    pass

class Image(models.Model):
     content_object = GenericRelationField()

# Example of filtering
post = Post.objects.get(pk=1)
images = Image.objects.filter(content_object=post)

Personally, I found it much simpler and cleaner.

Features the application provides:

• Creating an arbitrary number of generic relation fields, both required and optional;
• Providing custom names for content_type and object_id columns
• You can define a whitelist (or a black one) of models that could (not) be written into the field

Please, follow up the documentation for details.

Contributing

• If you found a bug, feel free to drop me an issue on the repo <https://github.com/marazmiki/django-generic-helpers/issues/new>_;
• Implemented a new feature could be useful? Create a PR <https://github.com/marazmiki/django-generic-helpers/compare>_!

A few words if you plan to send a PR:

• Please, write tests!
• Follow PEP-0008 <https://www.python.org/dev/peps/pep-0008/>_ codestyle recommendations.
• When pushing, please wait while Travis CI <https://travis-ci.org/marazmiki/django-generic-helpers>_ will finish his useful work and complete the build. And if the build fails, please fix the issues before PR
• And of course, don't forget to add yourself into the authors list <https://github.com/marazmiki/django-generic-helpers/blob/master/docs/authors.rst>_ ;)

License

The license is MIT.