Abstract ObjectTypes don't have a specific type.

[Grmiade]

I have this error, when I add a second inheritance class in my main Query.

class Query(trainings.schema.Query, brainstormers.schema.Query):
    """This class will inherit from multiple Queries as we begin to add more apps to our project."""

    pass

schema = graphene.Schema(name='MTP Schema')
schema.query = Query

[syrusakbary]

Are the inherited classes (trainings.schema.Query and brainstormers.schema.Query) abstract?

By abstract I meant this:

# In trainings/schema.py
class Query(graphene.ObjectType):
    class Meta:
        abstract = True

Check this comment in a related issue: #55 (comment)
;)

Going to close this issue, but feel free to reopen if is not working for you!

[Grmiade]

Yes my classes are abstracts like this.

class BrainstormerNode(DjangoNode):

    class Meta:
        model = Brainstormer
        filter_order_by = ['name']


class BrainstormerPropositionGroupNode(DjangoNode):

    class Meta:
        model = BrainstormerPropositionGroup
        filter_order_by = ['name']


class Query(ObjectType):

    class Meta:
        abstract = True

    brainstormer = relay.NodeField(BrainstormerNode)
    all_brainstormer = DjangoFilterConnectionField(BrainstormerNode)

    brainstormer_proposition_group = relay.NodeField(BrainstormerPropositionGroupNode)
    all_brainstormer_proposition_group = DjangoFilterConnectionField(BrainstormerPropositionGroupNode)

and

class TrainingSessionNode(DjangoNode):

    class Meta:
        model = TrainingSession


class Query(ObjectType):

    class Meta:
        abstract = True

    sessions = relay.NodeField(TrainingSessionNode)
    all_sessions = DjangoFilterConnectionField(TrainingSessionNode)

An idea ?

[syrusakbary]

@Grmiade Can you copy the output of the error here?

[Grmiade]

Sure.

ERROR Internal Server Error: /graphql
Traceback (most recent call last):
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/contextlib.py", line 30, in inner
    return func(*args, **kwds)
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/django/views/generic/base.py", line 65, in view
    self = cls(**initkwargs)
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/graphene/contrib/django/views.py", line 10, in __init__
    schema=schema.schema,
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/graphene/core/schema.py", line 83, in schema
    query=self.T(self.query),
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/graphene/core/schema.py", line 58, in T
    internal_type = _type.internal_type(self)
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/graphene/core/classtypes/uniontype.py", line 37, in internal_type
    types=list(map(schema.T, cls._meta.types)),
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/graphene/core/schema.py", line 58, in T
    internal_type = _type.internal_type(self)
  File "/Users/jeremyfauvel/.virtualenvs/mtp/lib/python3.4/site-packages/graphene/core/classtypes/objecttype.py", line 91, in internal_type
    raise Exception("Abstract ObjectTypes don't have a specific type.")
Exception: Abstract ObjectTypes don't have a specific type.

[syrusakbary]

Reopening the issue as the previous fix #55 was invalidated by a major refactor.
This issue will be fixed very soon (few minutes).

[Grmiade]

Thanks.

[syrusakbary]

@Grmiade A new version of graphene is uploaded to PyPI 0.6.1... use it and everything should be fine! ;)
https://pypi.python.org/pypi/graphene/0.6.1

[Grmiade]

It's work !
So fast ! Thank you so much ;)

[greenteamer]

Hello, i have the same 500 error in 0.7.3 version when trying
query { allNotes { edges { node { id, title } } } }

this is my schema

class NotesNode(DjangoNode):
    class Meta:
        model = Notes
        filter_fields = ['title',]
        filter_order_by = ['title']

class Query(ObjectType):
    note = relay.NodeField(NotesNode)
    all_notes = DjangoFilterConnectionField(NotesNode)

    class Meta:
        abstract = True

schema = graphene.Schema(name='Notes Schema')
schema.query = Query

and this is my model

class Notes(models.Model):
    title   = models.CharField(max_length=100)
    text    = models.TextField()

    def __str__(self):
        return self.title

[syrusakbary]

@greenteamer could you detail a little bit more?

A stacktrace of the Exception or the output of the /graphql endpoint when querying would be useful :)

[greenteamer]

Traceback (most recent call last):
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/django/core/handlers/base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/django/core/handlers/base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/django/views/generic/base.py", line 62, in view
    self = cls(**initkwargs)
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/graphene/contrib/django/views.py", line 10, in __init__
    schema=schema.schema,
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/graphene/core/schema.py", line 86, in schema
    query=self.T(self.query),
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/graphene/core/schema.py", line 61, in T
    internal_type = _type.internal_type(self)
  File "/Users/greenteamer/Desktop/Django/env/monolit/lib/python2.7/site-packages/graphene/core/classtypes/objecttype.py", line 96, in internal_type
    raise Exception("Abstract ObjectTypes don't have a specific type.")
Exception: Abstract ObjectTypes don't have a specific type.

[syrusakbary]

@greenteamer The final query type used in the schema should not be abstract.
Try with:

class Query(ObjectType):
    note = relay.NodeField(NotesNode)
    all_notes = DjangoFilterConnectionField(NotesNode)

(without the Meta)

[syrusakbary]

The abstract queries bases should only be used when we inherit the final Query type from them.

Example:

class QueryNotes(ObjectType):
    note = relay.NodeField(NotesNode)
    all_notes = DjangoFilterConnectionField(NotesNode)
    class Meta:
         abstract = True

class QueryUsers(ObjectType):
    user = relay.NodeField(UserNote)
    all_users = DjangoFilterConnectionField(UserNote)
    class Meta:
         abstract = True

class Query(QueryNotes, QueryUsers):
    pass

schema = graphene.Schema(name='My Schema')
schema.query = Query

[greenteamer]

wow ... this is amasing!!! thank you !!! you did a great job

[jcouser]

Hi,

I wasn't sure where this comment was best placed. Which is also in:
#55

I'm attempting to create this level of abstraction as well. I'm using graphql-sqlalchemy and when I do something like:

class UserGroupMember(SQLAlchemyObjectType):
    class Meta:
        abstract = True
        model = UserGroupMemberModel
        interfaces = (CustomNode, )

I'm getting the following error:

TypeError: Invalid attributes: abstract