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πŸ›οΈ Refactor: Paginator - Generic strict typing & Explicit fetch logic#744

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fderuiter merged 1 commit intomainfrom
architect/paginator-generic-refactor-3545332886603491126
Mar 29, 2026
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πŸ›οΈ Refactor: Paginator - Generic strict typing & Explicit fetch logic#744
fderuiter merged 1 commit intomainfrom
architect/paginator-generic-refactor-3545332886603491126

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πŸ›οΈ Refactor Candidate: BasePaginator mixed logic & cast()

The Smell:
BasePaginator mixed both sync (_iter_sync) and async (_iter_async) iteration methods using a type-union client attribute, relying on explicit cast() calls at runtime to appease type checkers. This violated the single responsibility principle, explicitly hid the true state of sync/async execution, and created "God Function" tendencies in the base class.

The Fix:
Extract Class & Pull Up Member. Converted BasePaginator to inherit from Generic[ClientT]. Pulled the fetching execution logic fully into the concrete subclasses (Paginator and AsyncPaginator implementing __iter__ and __aiter__ directly) removing all Type Unions and type casts, achieving strict sync/async execution boundaries.

Verification:

  • Types are strict (No Any or cast)
  • Sync/Async parity maintained
  • No logic changes, only structural
  • All unit tests pass and code is formatted.

PR created automatically by Jules for task 3545332886603491126 started by @fderuiter

- Converted BasePaginator into Generic[ClientT] to eliminate the client type union (`RequestorProtocol | AsyncRequestorProtocol`) and explicit dynamic `cast()` runtime calls.
- Pulled up specific sync and async fetching execution logic into the `__iter__` and `__aiter__` dunder methods within their respective subclasses (`Paginator`, `AsyncPaginator`, `JsonListPaginator`, and `AsyncJsonListPaginator`).
- Removed `_iter_sync` and `_iter_async` hidden logic from `BasePaginator`.
- Enforces strict sync/async parity and explicit static type checking per "Architect" constraints.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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@fderuiter fderuiter marked this pull request as ready for review March 29, 2026 21:37
@fderuiter fderuiter merged commit d719f86 into main Mar 29, 2026
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@fderuiter fderuiter deleted the architect/paginator-generic-refactor-3545332886603491126 branch March 29, 2026 21:37
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