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Description
I'm attempting to use GenericReferenceField
or GenericLazyReferenceField
fields in combination with ListField
. However, it seems that the fields cannot be resolved correctly. I have the following model and graphene schema defined:
Model:
from mongoengine import ListField, Document, GenericReferenceField
class AndroidApp(Document):
...
generic_field_list = ListField(GenericReferenceField())
...
Schema:
import graphene
from graphene.relay import Node
from graphene_mongo import MongoengineObjectType
from graphql_jwt.decorators import superuser_required
from model import AndroidApp
class AndroidAppType(MongoengineObjectType):
class Meta:
model = AndroidApp
interfaces = (Node,)
class AndroidAppQuery(graphene.ObjectType):
android_app_list = graphene.List(AndroidAppType,
object_id_list=graphene.List(graphene.String),
name="android_app_list")
def resolve_android_app_list(self, info, object_id_list):
return AndroidApp.objects(pk__in=object_id_list)
Whenever I add the ListField(GenericReferenceField())
the following stack trace occurs which says that the field cannot be resolved. A ListField in combination with LazyReferenceField
works with the same model but not with the GenericLazyReferenceField
or GenericReferenceField
classes.
Stacktrace:
File "/usr/local/lib/python3.9/site-packages/graphene/types/schema.py", line 440, in __init__
self.graphql_schema = GraphQLSchema(
File "/usr/local/lib/python3.9/site-packages/graphql/type/schema.py", line 224, in __init__
collect_referenced_types(query)
File "/usr/local/lib/python3.9/site-packages/graphql/type/schema.py", line 433, in collect_referenced_types
collect_referenced_types(field.type)
File "/usr/local/lib/python3.9/site-packages/graphql/type/schema.py", line 433, in collect_referenced_types
collect_referenced_types(field.type)
File "/usr/local/lib/python3.9/site-packages/graphql/type/schema.py", line 432, in collect_referenced_types
for field in named_type.fields.values():
File "/usr/local/lib/python3.9/functools.py", line 993, in __get__
val = self.func(instance)
File "/usr/local/lib/python3.9/site-packages/graphql/type/definition.py", line 811, in fields
raise cls(f"{self.name} fields cannot be resolved. {error}") from error
TypeError: AndroidAppType fields cannot be resolved. Expected Graphene type, but received: <class 'NoneType'>.
What is the intended way of using GenericReferenceField
with ListField
? I guess according to #70 it should be supported to use the GenericReferenceField
.
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