Graphene: ImportError: cannot import name 'get_default_backend'

[mikkokotila]

In a fresh env I get the below:

Mikkos-Air:Studio-Stream mikko$ python app.py
Traceback (most recent call last):
  File "app.py", line 3, in <module>
    from flask_graphql import GraphQLView
  File "/Users/mikko/miniconda3/lib/python3.6/site-packages/Flask_GraphQL-2.0.0-py3.6.egg/flask_graphql/__init__.py", line 1, in <module>
    from .blueprint import GraphQL
  File "/Users/mikko/miniconda3/lib/python3.6/site-packages/Flask_GraphQL-2.0.0-py3.6.egg/flask_graphql/blueprint.py", line 5, in <module>
    from .graphqlview import GraphQLView
  File "/Users/mikko/miniconda3/lib/python3.6/site-packages/Flask_GraphQL-2.0.0-py3.6.egg/flask_graphql/graphqlview.py", line 7, in <module>
    from graphql_server import (HttpQueryError, default_format_error,
  File "/Users/mikko/miniconda3/lib/python3.6/site-packages/graphql_server_core-1.1.1-py3.6.egg/graphql_server/__init__.py", line 5, in <module>
    from graphql import get_default_backend
ImportError: cannot import name 'get_default_backend'

[mikkokotila]

Workaround is to:

pip install graphql-core==2.2.1
pip install graphene==2.1.8

[jkimbo]

@mikkokotila the new version of graphql-core v3 removes the backend feature that was present in v2. It looks like Flask GraphQL needs to update it's dependencies so that it's not including a version of graphql-core it doesn't support.

[jkimbo]

Ah looks like I've already created a PR for this which I have forgotten about! https://github.com/graphql-python/flask-graphql/pull/60 I'll try and bring it up to date.

[babaMar]

Experiencing the same problem, any other suggested solution other than waiting the PR to be merged?

[babaMar]

@jkimbo I see Travis builds were failing, so I created https://github.com/graphql-python/flask-graphql/pull/65

[ivancarrancho]

Please mix it guys https://github.com/graphql-python/flask-graphql/pull/65
Thanks @babaMar

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[jkimbo]

Looks like this issue has been fixed in flask-graphql