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document auth pattern: return None with resolve method (#1106)
* document auth pattern: return None with resolve method * (doc, auth): also show that one can raise an exception in a resolve method
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@ -48,6 +48,31 @@ conversely you can use ``exclude`` meta attribute.
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exclude = ('published', 'owner')
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interfaces = (relay.Node, )
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Another pattern is to have a resolve method act as a gatekeeper, returning None
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or raising an exception if the client isn't allowed to see the data.
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.. code:: python
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from graphene import relay
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from graphene_django.types import DjangoObjectType
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from .models import Post
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class PostNode(DjangoObjectType):
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class Meta:
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model = Post
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fields = ('title', 'content', 'owner')
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interfaces = (relay.Node, )
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def resolve_owner(self, info):
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user = info.context.user
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if user.is_anonymous:
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raise PermissionDenied("Please login")
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if not user.is_staff:
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return None
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return self.owner
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Queryset Filtering On Lists
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---------------------------
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