Remove deprecated Extension import alias

[Ckk3]

Description

Remove the deprecated Extension import alias from strawberry.extensions, deprecated since 0.160.0.

Migration guide

Before (deprecated):

from strawberry.extensions import Extension

class MyExtension(Extension):
    ...

After:

from strawberry.extensions import SchemaExtension

class MyExtension(SchemaExtension):
    ...

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Documentation

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

Summary by Sourcery

Remove deprecated Extension alias from the extensions module and document the change for release notes.

Enhancements:

• Remove the deprecated Extension import alias in favour of SchemaExtension to complete the deprecation cycle.

Documentation:

• Add release notes outlining the removal of the Extension alias and providing a migration guide.

[sourcery-ai]

Reviewer's Guide

Removes the deprecated Extension attribute alias from strawberry.extensions and adds a release note with a migration guide instructing users to import and subclass SchemaExtension directly.

File-Level Changes

Change	Details	Files
Remove dynamic Extension alias and its deprecation warning from the extensions package.	Delete the __getattr__ implementation that intercepted Extension accesses, emitted a DeprecationWarning, and returned SchemaExtension. Rely on explicit exports via __all__ so Extension is no longer available from strawberry.extensions.	strawberry/extensions/__init__.py
Document the removal and provide a migration guide in release notes.	Add a new release note file declaring a minor release type. Document that Extension imports from strawberry.extensions must be replaced with SchemaExtension, including before/after code examples.	RELEASE.md

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[codspeed-hq]

Merging this PR will not alter performance

✅ 31 untouched benchmarks

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_{Comparing Ckk3:deprecation/extension-alias (486295e) with main (9c3bced)}

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[botberry]

Thanks for adding the RELEASE.md file!

Here's a preview of the changelog:

---

Remove deprecated Extension import alias from strawberry.extensions, deprecated since 0.160.0.

Migration guide

Before (deprecated):

from strawberry.extensions import Extension


class MyExtension(Extension): ...

After:

from strawberry.extensions import SchemaExtension


class MyExtension(SchemaExtension): ...

Here's the tweet text:

🆕 Release (next) is out! Thanks to Luis Gustavo for the PR 👏

Get it here 👉 https://strawberry.rocks/release/(next)

[greptile-apps]

Greptile Summary

Removes the deprecated Extension import alias from strawberry.extensions, which was deprecated since v0.160.0. The module-level __getattr__ fallback that redirected Extension to SchemaExtension with a deprecation warning is deleted, along with the now-unused import warnings. Users must now import SchemaExtension directly. A release note with migration guide is included.

• Removed __getattr__ function from strawberry/extensions/__init__.py that provided the deprecated Extension → SchemaExtension alias
• Removed unused import warnings statement
• Added RELEASE.md with minor release type and clear migration instructions
• No remaining references to the deprecated import exist in library source code or tests

Confidence Score: 5/5

• This PR is safe to merge — it only removes a previously-deprecated alias with no remaining internal references.
• The change is minimal, well-scoped, and only removes code that was explicitly deprecated since v0.160.0. No source files or tests in the repository use from strawberry.extensions import Extension. The release type (minor) is appropriate for a 0.x project removing deprecated functionality.
• No files require special attention.

Important Files Changed

Filename	Overview
strawberry/extensions/init.py	Removes the module-level __getattr__ that provided the deprecated Extension alias, and the import warnings statement. Clean removal with no remaining references in source code.
RELEASE.md	Adds release note with minor type and a migration guide showing how to replace the deprecated Extension import with SchemaExtension.

Flowchart

flowchart TD
    A["from strawberry.extensions import Extension"] -->|Before PR| B["__getattr__ intercepts"]
    B --> C["DeprecationWarning emitted"]
    C --> D["Returns SchemaExtension"]
    A -->|After PR| E["ImportError raised"]
    F["from strawberry.extensions import SchemaExtension"] -->|Both Before & After| G["Direct import succeeds"]

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_{Last reviewed commit: 486295e}

[greptile-apps]

_{2 files reviewed, no comments}

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