django-pydantic-field 0.0.4

Django JSONField with Pydantic models as a Schema

Django + Pydantic = 🖤

Django JSONField with Pydantic models as a Schema

Usage

Install the package with pip install django-pydantic-field.

import pydantic

from django.db import models
from django_pydantic_field import PydanticSchemaField


class Foo(pydantic.BaseModel):
    count: int
    size: float = 1.0


class Bar(pydantic.BaseModel):
    slug: str = "foo_bar"


class MyModel(models.Model):
    foo_field = PydanticSchemaField(schema=Foo)
    bar_list = PydanticSchemaField(schema=list[Bar])

...
    
model = MyModel(foo_field={"count": "5"}, bar_list=[{}])
model.save()

assert model.foo_field == Foo(count=5, size=1.0)
assert model.bar_list == [Bar(slug="foo_bar")]

Django REST Framework support

from rest_framework import serializers
from django_pydantic_field.rest_framework import PydanticSchemaField


class MyModelSerializer(serializers.ModelSerializer):
    foo_field = PydanticSchemaField(schema=Foo)

    class Meta:
        model = MyModel
        fields = '__all__'

Global approach with typed parser and renderer classes

from rest_framework.decorators import api_view, parser_classes, renderer_classes
from django_pydantic_field.rest_framework import PydanticSchemaRenderer, PydanticSchemaParser


@api_view(["POST"])
@parser_classes([PydanticSchemaParser[Foo]]):
@renderer_classes([PydanticSchemaRenderer[list[Foo]]])
def foo_view(request):
    assert isinstance(request.data, Foo)

    count = request.data.count + 1
    return Response([Foo(count=count)])

Acknowledgement

• Churkin Oleg for his Gist as a source of inspiration;
• Boutique Air Flight Operations platform as a test ground;