Unrelated, do you have any reason to not reuse the existing django
permission system ?
2016-09-21 16:41 GMT+02:00 TheBeardedTemplar <thebeardedtemp...@gmail.com>:
> Hey all,
> I'm just getting started with GenericForeignKeys and I've run into a small
> point of confusion. I'm implementing a very general permission system as
> class Permission(models.Model):
> This stores permissions for a single object.
> #These 3 fields are used to implement a generic foreign key
> content_type = models.ForeignKey(ContentType)
> object_id = models.PositiveIntegerField()
> model = GenericForeignKey()
> user = models.ForeignKey(User)
> read = models.BooleanField(default=False)
> write = models.BooleanField(default=False)
> delete = models.BooleanField(default=False)
> I also have a check permission function as follows:
> def checkPermission(self, obj, user, action):
> p = Permission.objects.get(model=obj, user=user)
> return getattr(p, action)
> except ObjectPermission.DoesNotExist:
> return False
> Currently this fails because I'm trying to access the GenericForeignKey
> directly, and I get this error:
> django.core.exceptions.FieldError: Field 'model' does not generate an
> automatic reverse relation and therefore cannot be used for reverse
> querying. If it is a GenericForeignKey, consider adding a GenericRelation.
> I've spent a while reading about GenericRelations but I'm still not exactly
> sure how to go about this. The Django documentation shows using
> GenericRelation fields on the models that my Permission points to, but it
> can point to many many different things and I'm hoping to get a way to use
> this functionality without putting a GenericRelation on every possible
> linked to model.
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Cordialement, Coues Ludovic
+336 148 743 42
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