django-structured-metaobjects 1.1.0

User-defined typed JSON objects for Django, powered by django-structured-json-field

django-structured-metaobjects

User-defined, typed JSON objects for Django — built on top of django-structured-json-field.

Editors define meta types in the admin (a list of typed field definitions). Each MetaInstance then picks one of those types and the admin form / REST API automatically adapts to the schema declared by the chosen type.

Features

• Field kinds: string, html, number, boolean, date, datetime, select, ref (single FK), queryset (list of FKs), group (nested object), list (repeating group), with optional translated=True per-field.
• Runtime Pydantic compiler with per-MetaType caching, invalidated on save.
• Admin form rebuilds the data widget for the selected meta type.
• DRF MetaTypeViewSet / MetaInstanceViewSet with schema/ action.
• Typed access on instance.obj.<field> returning the parsed Pydantic model — FK / queryset fields lazily resolve to real Django objects with structured-json-field's caching.

Install

pip install django-structured-metaobjects

Add to INSTALLED_APPS:

INSTALLED_APPS = [
    # ...
    "structured",
    "structured_metaobjects",
]

Wire the REST endpoints into your router:

from rest_framework import routers
from structured_metaobjects.views import MetaTypeViewSet, MetaInstanceViewSet

router = routers.DefaultRouter()
router.register(r"meta-types", MetaTypeViewSet, "meta-types")
router.register(r"meta-instances", MetaInstanceViewSet, "meta-instances")

Field kinds

kind	Python type built by the compiler	Notes
string	str	Supports multiline, min_length, max_length, placeholder.
html	str	Rich-text. Supports placeholder.
number	float / int	Set integer=True for int. Supports minimum, maximum.
boolean	bool
date	datetime.date
datetime	datetime.datetime
select	str	Requires choices (list of {value, label}).
ref	<TargetModel>	Requires target_model="app.Model".
queryset	List[<TargetModel>]	Requires target_model="app.Model".
group	nested Pydantic model from children	Requires children.
list	List[<group model>] from children	Requires children.

Setting translated=True wraps the field in Dict[str, T] so the value is a per-language map.

Typed access

instance = MetaInstance.objects.get(pk=1)
obj = instance.obj                # cached Pydantic instance
obj.title                         # typed string
obj.related_page                  # real Django model instance (lazy/cached)
obj.gallery                       # list of real Django model instances