Who contributed to FastAPI & Pydantic on August 2, 2026?

1 developer shipped this update, including Bishwas Bhandari.

What were the notable FastAPI & Pydantic updates?

Fix documented signature of `field_title_generator` (#13565) and Fix documented signature of `field_title_generator`.

FastAPI & Pydantic

FastAPI and the Pydantic + SQLModel async-Python stack

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PYDANTIC FIXES `field_title_generator` SIGNATURE MISMATCH

By RepoJournal · Filed 06:58 UTC on August 2, 2026 · About FastAPI & Pydantic

1 person shipped this

Bishwas Bhandari @Bishwas-py 2 cited

The documented signature for `field_title_generator` was wrong, and developers following the docs would hit a TypeError.

Pydantic's `field_title_generator` callback has been documented across `Field()`, `FieldInfo.from_field()`, `computed_field()`, and `ComputedFieldInfo` as taking only a field name and returning a title [1]. The actual implementation invokes it with two arguments: the field name and its info object [2]. Anyone building a title generator from the docstring docs would pass a single-argument function and crash on runtime. The fix corrects the documented signature to match reality, eliminating the gotcha [2]. This is a small but important correction that prevents confusion during onboarding and saves debugging time in production code.

Action items

→ Update custom `field_title_generator` functions to accept (field_name, field_info) if you have them pydantic/pydantic [plan]
→ Review docs-following code that implements title generators before next release pydantic/pydantic [monitor]

References

[1] Fix documented signature of `field_title_generator` (#13565) pydantic/pydantic
[2] Fix documented signature of `field_title_generator` ↗ pydantic/pydantic

Quick answers

What shipped in FastAPI & Pydantic on August 2, 2026?: The documented signature for `field_title_generator` was wrong, and developers following the docs would hit a TypeError. In total, 1 commits and 1 pull requests landed.
Who contributed to FastAPI & Pydantic on August 2, 2026?: 1 developer shipped this update, including Bishwas Bhandari.
What were the notable FastAPI & Pydantic updates?: Fix documented signature of `field_title_generator` (#13565) and Fix documented signature of `field_title_generator`.

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