64 lines
2.8 KiB
Python
64 lines
2.8 KiB
Python
import sys
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from django.contrib.auth.management import _get_all_permissions
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from django.contrib.auth.models import Permission
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from django.contrib.contenttypes.management import update_contenttypes
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from django.contrib.contenttypes.models import ContentType
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from django.db import models
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def create_proxy_permissions(app, created_models, verbosity, **kwargs):
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"""
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Creates permissions for proxy models which are not created automatically
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by `django.contrib.auth.management.create_permissions`.
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see https://code.djangoproject.com/ticket/11154
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This method is inspired by `django.contrib.auth.managment.create_permissions`.
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Since we can't rely on `get_for_model' we must fallback to `get_by_natural_key`.
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However, this method doesn't automatically create missing `ContentType` so
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we must ensure all the model's `ContentType` are created before running this method.
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We do so by unregistering the `update_contenttypes` `post_syncdb` signal and calling
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it in here just before doing everything.
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"""
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update_contenttypes(app, created_models, verbosity, **kwargs)
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app_models = models.get_models(app)
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# This will hold the permissions we're looking for as
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# (content_type, (codename, name))
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searched_perms = list()
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# The codenames and ctypes that should exist.
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ctypes = set()
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for model in app_models:
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opts = model._meta
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if opts.proxy:
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# We can't use `get_for_model` here since it doesn't return
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# the correct `ContentType` for proxy models.
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# see https://code.djangoproject.com/ticket/17648
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app_label, model = opts.app_label, opts.object_name.lower()
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ctype = ContentType.objects.get_by_natural_key(app_label, model)
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ctypes.add(ctype)
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for perm in _get_all_permissions(opts, ctype):
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searched_perms.append((ctype, perm))
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# Find all the Permissions that have a content_type for a model we're
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# looking for. We don't need to check for codenames since we already have
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# a list of the ones we're going to create.
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all_perms = set(Permission.objects.filter(
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content_type__in=ctypes,
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).values_list(
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"content_type", "codename"
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))
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objs = [
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Permission(codename=codename, name=name, content_type=ctype)
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for ctype, (codename, name) in searched_perms
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if (ctype.pk, codename) not in all_perms
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]
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Permission.objects.bulk_create(objs)
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if verbosity >= 2:
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for obj in objs:
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sys.stdout.write("Adding permission '%s'" % obj)
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models.signals.post_syncdb.connect(create_proxy_permissions)
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# see `create_proxy_permissions` docstring to understand why we unregister
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# this signal handler.
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models.signals.post_syncdb.disconnect(update_contenttypes)
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