How can I restrict Django’s GenericForeignKey to a list of models?

For example,
your apps are app and app2 and there are A, B models in app and there are C, D models in app2.
you want to see only app.A and app.B and app2.C

from django.db import models

class TaggedItem(models.Model):
    tag = models.SlugField()
    limit = models.Q(app_label="app", model="a") | models.Q(app_label="app", model="b") | models.Q(app_label="app2", model="c")
    content_type = models.ForeignKey(ContentType, limit_choices_to = limit)
    object_id = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey('content_type', 'object_id')

use limit_choices_to on ForeignKey.

check django docs for details and Q objects, app_label.
you need to write proper app_label and model. This is just code snippet

plus: I think you write wrong app_label. This can help you.

from django.contrib.contenttypes.models import ContentType
for c in ContentType.objects.all():
    print(c.app_label, c.model)

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