generic_model_sandbox

Sandbox to test Generic relationships in DRF vs multiple ForeignKeys

NOTE: This project is for research purposes only. Don't use in production, use it with caution.

References:

• DRF generic-relationships

• django-orm-cookbook

• Django generic-relations

Quick start

git clone https://github.com/gnud/generic_model_sandbox
cd generic_model_sandbox
virtualenv -p python3 venv
. venv/bin/activate
pip install -r requirements.txt
./manage.py migrate
./manage.py loaddata generic_app/fixtures/full_data.json
./manage.py shell -c "from django.contrib.auth.models import User; User.objects.create_superuser('root', 'root@example.com', 'password')"

Run server

./manage.py runserver

Quick links

http://localhost:8000/admin/

Demo credentials:

user: root
pass: password

All the links

• Admin

  • Admin comment

  • Admin comment2

• DRF API

  • API comment

  • API comment2

Problems solving

Version 1

Single model named Comment having 2 sub models: Article, Post for the content. Content is retrieved and automatically determined via RelatedField.

DRF API that outputs content field object: URL: GET /api/app/v1/comment/

[
    {
        "pk": 1,
        "content": null
    },
    {
        "pk": 2,
        "content": {
            "pk": 2,
            "content": "Post2"
        }
    },
    {
        "pk": 3,
        "content": {
            "pk": 3,
            "content": "article3"
        }
    }
]

Version 2

Model named CommentNormal having 2 sub models: Article, Post using 2 separate related fields, with rules one has to be null. Content object is determined by serializer method by hand, poorly.

DRF API that outputs content field object: URL: GET /api/app/v1/comment2/

[
    {
        "pk": 1,
        "content": {
            "pk": 1,
            "content": "article1"
        }
    },
    {
        "pk": 2,
        "content": {
            "pk": 1,
            "content": "Post1"
        }
    },
    {
        "pk": 3,
        "content": {
            "pk": 1,
            "content": "Post1"
        }
    }
]