[3.2.7+] Breaking changes in `src/graphql/type/introspection.py` not reported in changelogs

[ilovelinux]

The problem:

• Commit 42328a6 changed some classes in introspection.py, leading to a breaking change

Related issues:

• Import error of TypeResolvers from within graphql parser code with graphql-core==3.2.7 koxudaxi/datamodel-code-generator#2533

Notes:
It looks like that commit was originally meant for v3.3.x: 4c8ecd4
However it has been merged in v.3.2.7 release.

[Cito]

Hi @ilovelinux,

The commit was actually intentional. It was part of the frequently requested schema pickle support which was only available in v3.3 so far, but has now been backported to v3.2. Unfortunately, I cannot just release a stable v3.3 to make the feature available, since the upstream branch for v3.3 (v17) is still unstable.

However, the commit does not involve changes in the official API surface. The TypeResolvers is not an officially class that is part of the API. The supported classes are only those that are mentioned in the docs and can be imported directly from the graphql module. So I do no consider it a breaking change. As you see in your error message, the corresponding warning about the import was silenced with # noqa: PLC0415.

As a temporary solution, you can pin the GraphQL-core version to 3.2.6. As a permanent solution, you should try to adapt the code to either use only the official API, or change the name TypeResolvers to TypeFields which has all the attributes of the former TypeResolvers. As an interim solution, I could also create a patch release that exports TypeFields as TypeResolvers to make it more backward compatible. Let me know if this is needed or you can adapt on your side.