Two interfaces on a node object produces incorrect graphql schema output

[berkcoker]

Note: for support questions, please use stackoverflow. This repository's issues are reserved for feature requests and bug reports.

• What is the current behavior?
  Using two interfaces on a single node results in a schema file where the Interfaces are separated by comma and not ampersand. The comma results in an error, when using, say relay compiler.

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via
  a github repo, https://repl.it or similar.

• Inherit from two different interfaces
• Output the schema using graphql_schema

• What is the expected behavior?

• What is the motivation / use case for changing the behavior?

• Please tell us about your environment:

  • Version:
  • Platform:

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow)

[DoctorJohn]

Thanks for reporting @berkcoker

This issue has its origin in graphql-core, it has been reported there and has been fixed in graphql-core v3. Unfortunately the stable release of graphene still depends on graphql-core v2.

I encountered this issue myself and decided to use the beta releases of graphene v3. They depend on graphql-core v3 and thus contain the fix.