Flask example gives ImportError

[MattKleinsmith]

Flask example gives ImportError

[erikwrede]

I'd strongly advise using the 3.0 beta if you're starting off a new project. It works best together with an asyncio-based framework like FastAPI, but flask is also fine.
https://github.com/ciscorn/starlette-graphene3

This should work with flask + graphene 3: https://github.com/graphql-python/graphql-server

[MattKleinsmith]

Someone suggested upgrading Flask-GraphQL to 2.0.1, here:

https://stackoverflow.com/questions/70204957/flask-graphql-import-fails

I'll try it.

"Successfully installed":

• Flask-GraphQL-2.0.1
• graphql-core-2.3.2
• rx-1.6.3

Now the error is:

ImportError: cannot import name 'GraphQLResolveInfo' from 'graphql' (/home/mwk/code/graphene-sqlalchemy/.venv/lib/python3.9/site-packages/graphql/__init__.py)

I used pip install Flask-GraphQL==2.0.1, but someone in the same Stack Overflow post recommended putting flask-graphql>=2.0.1 in requirements.txt instead. I'll try it.

Result: Pip conflict:

The conflict is caused by:
flask-graphql 2.0.1 depends on graphql-core<3 and >=2.1
graphene 3.2.1 depends on graphql-core<3.3 and >=3.1
[...]
flask-graphql 2.0.1 depends on graphql-core<3 and >=2.1
graphene 3.0b7 depends on graphql-core<4 and >=3.1.2

Interesting note from flask-graphql:

[MattKleinsmith]

Going to try downgrading graphene-sqlalchemy (or Graphene itself?) from v3.0, because the README says:

Version 3.0 is in beta stage. Please read #348 to learn about progress and changes in upcoming beta releases.

Scratch this. Not sure which version I should downgrade to. Going to instead chase the errors by editing the pip packages.

[MattKleinsmith]

Okay, flask-graphql's fix was to pin graphql-core to be under version 3.

However, the latest graphene versions require graphql-core to be over version 3.1.

So, I will try to find the latest graphene version that allows graphql-core to be under version 3.

The target version seems to be: graphene==2.1.9
Given this: https://pypi.org/project/graphene/#history

This leads to a new dependency error:

The user requested graphene==2.1.9
graphene-sqlalchemy 3.0.0b3 depends on graphene>=3.0.0b7

The target version seems to be: graphene-sqlalchemy==2.3.0
Given this: https://pypi.org/project/graphene-sqlalchemy/#history

[MattKleinsmith]

Seems to be working now:

Approach: Downgrade.

How: Replace the entire contents of graphene-sqlalchemy/examples/flask_sqlalchemy/requirements.txt with:

flask-graphql==2.0.1
graphene==2.1.9
graphene-sqlalchemy==2.3.0

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related topics referencing this issue.