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Update dependency fastapi to >=0.120.0,<0.121.0 #993

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Update dependency fastapi to >=0.120.0,<0.121.0 #993

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@renovate renovate bot commented Oct 13, 2025 •
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This PR contains the following updates:

Package Change Age Confidence
fastapi (changelog) >=0.115.2,<0.117.0 -> >=0.120.0,<0.121.0 age confidence

Release Notes

fastapi/fastapi (fastapi)

v0.120.0

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There are no major nor breaking changes in this release. ☕️

The internal reference documentation now uses annotated_doc.Doc instead of typing_extensions.Doc, this adds a new (very small) dependency on annotated-doc, a package made just to provide that Doc documentation utility class.

I would expect typing_extensions.Doc to be deprecated and then removed at some point from typing_extensions, for that reason there's the new annotated-doc micro-package. If you are curious about this, you can read more in the repo for annotated-doc.

This new version 0.120.0 only contains that transition to the new home package for that utility class Doc.

Translations
Internal

v0.119.1

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Fixes
  • 🐛 Fix internal Pydantic v1 compatibility (warnings) for Python 3.14 and Pydantic 2.12.1. PR #​14186 by @​svlandeg.
Docs
  • 📝 Replace starlette.io by starlette.dev and uvicorn.org by uvicorn.dev. PR #​14176 by @​Kludex.
Internal

v0.119.0

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FastAPI now (temporarily) supports both Pydantic v2 models and pydantic.v1 models at the same time in the same app, to make it easier for any FastAPI apps still using Pydantic v1 to gradually but quickly migrate to Pydantic v2.

from fastapi import FastAPI
from pydantic import BaseModel as BaseModelV2
from pydantic.v1 import BaseModel

class Item(BaseModel):
    name: str
    description: str | None = None

class ItemV2(BaseModelV2):
    title: str
    summary: str | None = None

app = FastAPI()

@&#8203;app.post("/items/", response_model=ItemV2)
def create_item(item: Item):
    return {"title": item.name, "summary": item.description}

Adding this feature was a big effort with the main objective of making it easier for the few applications still stuck in Pydantic v1 to migrate to Pydantic v2.

And with this, support for Pydantic v1 is now deprecated and will be removed from FastAPI in a future version soon.

Note: have in mind that the Pydantic team already stopped supporting Pydantic v1 for recent versions of Python, starting with Python 3.14.

You can read in the docs more about how to Migrate from Pydantic v1 to Pydantic v2.

Features
  • ✨ Add support for from pydantic.v1 import BaseModel, mixed Pydantic v1 and v2 models in the same app. PR #​14168 by @​tiangolo.

v0.118.3

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Upgrades

v0.118.2

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Fixes
Internal

v0.118.1

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Upgrades
Docs
Translations
Internal

v0.118.0

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0.118.0

Fixes
  • 🐛 Fix support for StreamingResponses with dependencies with yield or UploadFiles, close after the response is done. PR #​14099 by @​tiangolo.

Before FastAPI 0.118.0, if you used a dependency with yield, it would run the exit code after the path operation function returned but right before sending the response.

This change also meant that if you returned a StreamingResponse, the exit code of the dependency with yield would have been already run.

For example, if you had a database session in a dependency with yield, the StreamingResponse would not be able to use that session while streaming data because the session would have already been closed in the exit code after yield.

This behavior was reverted in 0.118.0, to make the exit code after yield be executed after the response is sent.

You can read more about it in the docs for Advanced Dependencies - Dependencies with yield, HTTPException, except and Background Tasks. Including what you could do if you wanted to close a database session earlier, before returning the response to the client.

Docs
Translations
Internal

v0.117.1

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Fixes

v0.117.0

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Features
Fixes
  • ⚡️ Fix default_factory for response model field with Pydantic V1. PR #​9704 by @​vvanglro.
  • 🐛 Fix inconsistent processing of model docstring formfeed char with Pydantic V1. PR #​6039 by @​MaxwellPayne.
  • 🐛 Fix jsonable_encoder alters json_encoders of Pydantic v1 objects. PR #​4972 by @​aboubacs.
  • 🐛 Reenable allow_arbitrary_types when only 1 argument is used on the API endpoint. PR #​13694 by @​rmawatson.
  • 🐛 Fix inspect.getcoroutinefunction() can break testing with unittest.mock.patch(). PR #​14022 by @​secrett2633.
Refactors
Docs
Translations
Internal

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📅 Schedule: Branch creation - "after 10pm every weekday,every weekend,before 5am every weekday" in timezone Europe/Paris, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

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This PR was generated by Mend Renovate. View the repository job log.

@renovate renovate bot added dependencies use for pull requests that update a dependency file filigran team use to identify PR from the Filigran team labels Oct 13, 2025
@renovate renovate bot changed the title Update dependency fastapi to >=0.119.0,<0.120.0 Update dependency fastapi to >=0.119.1,<0.120.0 Oct 20, 2025
@renovate renovate bot force-pushed the renovate/fastapi-0.x branch from c5cf47f to 690eb5a Compare October 20, 2025 22:46
@renovate renovate bot changed the title Update dependency fastapi to >=0.119.1,<0.120.0 Update dependency fastapi to >=0.120.0,<0.121.0 Oct 24, 2025
@renovate renovate bot force-pushed the renovate/fastapi-0.x branch from 690eb5a to 7d0b8d4 Compare October 24, 2025 23:09
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