FastAPI

Summary

Fix support for background tasks and dependency headers in app.frontend().

Summary

Add app.frontend(check dir="auto") to simplify local development with FastAPI dev server

Summary

Fix status code being ignored for SSE and JSONL streaming endpoints

Summary

Fix line splitting in SSE event formatting to comply with the SSE specification

Summary

Fixes ignored response model parameters for non‑generator endpoints that return Iterable types.

Summary

Fixed handling of sequences with nested Annotated types

Summary

Fix jsonable encoder to correctly propagate exclude defaults for dict keys and values

Summary

Fixed loss of stream item type when using include router().

Summary

Refactor to avoid flattening dependencies for OpenAPI

Summary

Refactored request parameter handling to avoid flattening dependencies, improving OpenAPI schema generation.

Summary

Refactor to avoid flattening dependencies for body fields

Summary

Refactored Skip unused dependency handling to eliminate redundant repeat bookkeeping.

Summary

Refactored OpenAPI generation to cache dependency flattening

Summary

Refactored dependency handling to stop retaining flat dependency trees

Summary

Updated LRU cache limit for dependencies to better support large applications.

Summary

Refactor code to lower memory usage in dependencies.

Summary

Refactored router route building to be thread‑safe

Summary

Fix frontend fallback support for dotted paths (e.g., /users/john.doe).

Summary

Add support for dependencies in app.frontend(), enabling automatic cookie authentication for the frontend.

Summary

Make app.frontend() return 404 for non-GET/HEAD requests when no static file matches.

Summary

Refactor library skills to improve discoverability for agents

Summary

Added app.frontend() and router.frontend() helpers for serving a static directory (e.g., “dist”).

Summary

Added iter route contexts() for advanced router use cases (e.g., Jupyverse).

Summary

Fix typing checks for APIRoute

Summary

Refactored APIRouter/APIRoute handling: router.routes now forms a tree of intermediate objects, breaking code that expected a flat list.

Summary

Reject underscore headers when convert_underscores=True (default)

Summary

Refactored Server Sent Event field validation to prevent broken data.

Summary

Update Pydantic v2 code to address deprecations

Summary

Add support for free‑threaded Python 3.14t (PR 15149).

Summary

Removed the April Fool's @app.vibe() endpoint.

Summary

Added @app.vibe() support

Summary

Raise the minimum supported pydantic version to 2.9.0 and fix the test suite.

Summary

Fix TaskGroup usage to require an async context manager and ensure proper closure in the request async exit stack.

Summary

Add Server Sent Events (SSE) support to the framework.

Summary

Added streaming support for JSON Lines and binary data using `yield` and upgraded Starlette to 0.46.0.

Summary

Added FastAPI Agent Skill to the library.

Summary

Add support for Starlette 1.0.0+

Summary

Refactored logic for OpenAPI and Swagger UI data escaping.

Summary

Introduced strict JSON Content-Type validation, rejecting non‑JSON requests (breaking change, can be disabled via strict_content_type=False).

Summary

Deprecates ORJSONResponse.

Summary

Introduce Rust-powered JSON serialization for Pydantic return types or response models

Summary

Upgrade pytest dependency to the latest version.

Summary

Fixed JSON Schema for bytes by using contentMediaType "application/octet-stream".

Summary

Drop support for Python 3.9

Summary

Corrected grammar in the first‑steps tutorial documentation.

Summary

Added clear error when a router attempts to include itself

Summary

Fixed handling of startup and shutdown parameters in APIRouter.

Summary

Refactor and simplify internal utilities for Pydantic v2 (and v1) compatibility

Summary

Refactored internals: simplified Pydantic v2/v1 utilities, removed obsolete Pydantic v1‑only logic, added model field and improved lenient issubclass typing.

Summary

Reimplemented FastAPI event handling for compatibility with upcoming Starlette while preserving backward compatibility.

Summary

Added PEP695 TypeAliasType support and allowed Response type hints as dependency annotations

Summary

Add a viewport meta tag for better Swagger UI on mobile and enhance error messages for invalid query parameter type annotations.

Summary

Drop support for pydantic v1, requiring migration to v2.

Summary

Introduced a custom FastAPIDeprecationWarning and added missing tests for code examples.

Summary

Added deprecation warnings for pydantic.v1 usage (breaking change)

Summary

Dropped Pydantic v1 support; minimum required version is now pydantic 2.7.0 with updated settings and extra‑types dependencies.

Summary

Drop support for Python 3.8, making it a breaking change for installers.

Summary

Fixes handling of parameter aliases

Summary

Fixed support for tagged unions with discriminators inside Annotated Body parameters.

Summary

Fix handling of TYPE_CHECKING when using non‑evaluated stringified annotations.

Summary

Fix handling of arbitrary types when using allowed=True.

Summary

Improve tracebacks by adding endpoint metadata for better debugging

Summary

Fixed class (non-instance) dependency handling for call methods.

Summary

Fix OAuth2 scope handling in OpenAPI for edge cases.

Summary

Fixed OpenAPI generation of OAuth2 security scheme scopes

Summary

Fixed evaluation of stringified type annotations on Python 3.10.

Summary

Fixed support for combined functools.wraps and functools.partial with async and sync functions/classes in path operations and dependencies.

Summary

Add dependables support for functools.partial and wrapped functions with forward references, including handling of wrapped dependencies.

Summary

Fix OpenAPI schema support for computed fields when using separate input/output schemas disabled.

Summary

Fix Query/Header/Cookie parameter model alias issue

Summary

Fixed several parsing bugs: unformatted type in FastAPIError, extra non‑body and Form parameters handling, and empty string form values treated as missing.

Summary

Fixed bugs: prevented non‑existent "$ref" access for Pydantic v2, resolved TypeError when encoding Decimal NaN/Infinity, and fixed Windows UnicodeEncodeError in CLI tests.

Summary

Fixed caching of dependencies that lack scopes and have no sub‑dependencies with scopes.

Summary

Fixed hierarchical security scope propagation.

Summary

Security classes now return 401 for missing credentials; docs updated on overriding old 403 behavior.

Summary

Depends() and Security() now return hashable objects, improving compatibility with external tools.

Summary

Fixed handling of JSON Schema attributes named "$ref".

Summary

Fixed Depends(func, scope='function') handling for top‑level (parameterless) dependencies.

Summary

Add support for dependency scopes, including "request" scope for yield dependencies that exit before the response is sent

Summary

Fixed handling of security schemes in OpenAPI when defined at the top-level app.

Summary

Refactored dependency handling to eliminate cyclic recursion and simplify code using dataclasses.

Summary

Fix schema separation for nested models introduced in 0.119.0.

Summary

Upgrade Starlette dependency to versions below 0.50.0.

Summary

Switched internal reference docs to use annotated doc.Doc instead of typing_extensions.Doc, adding a tiny dependency

Summary

Fix internal Pydantic v1 compatibility warnings for Python 3.14 and Pydantic 2.12.1.

Summary

Added temporary ability to mix `pydantic.v1` and Pydantic v2 models within the same FastAPI app.

Summary

Add support for Python 3.14

Summary

Fix bug where tagged discriminated unions were not recognized as body fields

Summary

Added compatibility with Pydantic 2.12.0.

Summary

Fixed StreamingResponse handling with dependencies using `yield` so cleanup runs after the response is sent.

Summary

Fixed validation error when a `File` parameter is declared after a `Form` parameter

Summary

Added support for None return types, array schema types, and OpenAPI external docs parameter

Summary

Updated Starlette compatibility to >=0.40.0,<0.49.0 and bumped several internal dependencies (pyjwt, actions, mkdocs, ruff, etc.).

Summary

Updated supported Starlette version range to >=0.40.0,<0.48.0.

Summary

Add fastapi deploy command for FastAPI Cloud, included in fastapi[standard] extra

Summary

Fixed Form handling for union types

Summary

Fix truncating model description with form feed character for Pydantic V2 and resolve Pydantic deprecation warnings in internal scripts.

Summary

Fixed bug where header Pydantic models failed when convert underscores=False.

Summary

Added documentation examples and tests for Annotated custom validations (e.g., AfterValidator) and reverted a previous change.

Summary

Updated internal annotation usage for Pydantic 2.11 compatibility.

Summary

Fixed HTTPDigest exception handling and a minor bug in test module naming.

Summary

Fix OAuth2PasswordRequestForm and OAuth2PasswordRequestFormStrict grant‑type regex handling.

Summary

Bumped core dependencies: python‑multipart to 0.0.18, Starlette <0.46.0, and Jinja2 to 3.1.5.

Summary

Fix traceback preservation for exceptions raised in sync dependencies using yield.

Summary

Refactored internal checks to add support for Pydantic 2.10.

Summary

Refactored multipart import logic for compatibility with newer Python versions.

Summary

Upgrade Starlette to 0.40.x and httpx to 0.23.x (dependency updates).

Summary

Upgrade Starlette dependency to version >=0.37.2 and <0.41.0.

Summary

Fix openapi generation with responses kwarg and remove Required shadowing from FastAPI (bugfixes).

Summary

Add support for Pydantic models to define Query, Header, and Cookie parameters

Summary

Fixed form field regression with alias handling.

Summary

Added cache to speed up request body parsing, improving performance

Summary

Added support to forbid extra form fields using Pydantic model config "extra": "forbid".

Summary

Add support for using Pydantic models to declare form fields.

Summary

Performed extensive internal refactoring to lay groundwork for future Pydantic model support in Form, Query, and related parameters.

Summary

Refactored internal utilities (field checks, response model handling, dependency resolution) with clearer names and dataclasses.

Summary

Fix allow_inf_nan option for Param/Body and ensure app.include_router merges nested lifespans.

Summary

Upgrade Starlette compatibility to 0.38.x (dependency range update).

Summary

Breaking change: fastapi no longer includes standard dependencies by default; install with the optional extra "fastapi[standard]" and updated CLI support.

Summary

Removed orjson and ujson from FastAPI's default dependencies (still available via fastapi[all]).

Summary

Added FastAPI CLI (`fastapi` command) with new documentation.

Summary

Updated docs to note FastAPI supports all current Python versions and added Chinese and Spanish translations.

Summary

Fixed query parameter list handling and JSON encoding of Pydantic UndefinedType; added support for Pydantic 2.7 deprecated Field parameter.

Summary

Fixed bug with parameter‑less Depends() when using generics and corrected a typo in fastapi/security/oauth2.py

Summary

Fix memory leak in unhandled internal server errors by requiring re‑raise in dependencies using yield/except, introducing a breaking change for existing code.

Summary

Bump Starlette dependency to version 0.36.3.

Summary

Upgrade python‑multipart to ≥0.0.7 to fix a Content‑Type header ReDoS security issue.

Summary

Add Python 3.12 support, AnyIO 4.x compatibility and upgrade Starlette to 0.29.0.

Summary

Upgrade Starlette dependency to version >=0.29.0, <0.33.0.

Summary

Upgrade Starlette dependency to version 0.28.0

Summary

Yield‑based dependencies no longer support using their resources in background tasks; background tasks must create and manage their own resources.

Summary

Add support for multiple Annotated annotations (e.g., Annotated[str, Field(), Query()])

Summary

Pinned Swagger UI to version 5.9.0 to avoid a crash in 5.9.1 (temporary bug workaround).

Summary

Added FastAPI Reference Code API docs (PEP 727) and a BackgroundTasks subclass with custom docstrings, plus a docs structure refactor.

Summary

Upgrade compatibility to Pydantic v2.4, introducing renamed functions and JSON Schema input/output models with default values (potential breaking change).

Summary

Pin AnyIO to <4.0.0 to resolve incompatibility with Starlette 0.31.1.

Summary

Add support for OpenAPI examples in all FastAPI parameters.

Summary

Add option to disable separate input/output JSON Schemas in OpenAPI for Pydantic v2 (feature).

Summary

Added printable details for ResponseValidationError to appear in server error logs.

Summary

Enable Pydantic serialization mode, computed fields, and improved OpenAPI/response model handling for generated clients.

Summary

Fix compatibility with older Pydantic v1 by replacing MultHostUrl with AnyUrl.

Summary

Added first‑class support for Pydantic v2 while retaining compatibility with v1

Summary

Fix JSON Schema validation to reject boolean schemas (e.g., additionalProperties: false).

Summary

Add OpenAPI 3.1.0 support with Swagger UI 5.x, update examples handling via JSON Schema 2020‑12, and introduce webhook documentation

Summary

Add option to disable automatic slash redirects at the FastAPI app level.

Summary

Added dependency support and custom exception handling for WebSocket routes.

Summary

Fixed HTTPException header type annotations and corrected OpenAPI model integer validation (gte → ge).

Summary

Updated cloned field creation to use a global cache, improving startup performance.

Summary

Upgrade Starlette to 0.27.0 to address a security advisory.

Summary

Fix bug with Annotated in routers and path operations decorated multiple times.

Summary

Added PEP 593 Annotated support for declaring dependencies and parameters, preserving defaults and enabling full editor and runtime validation.

Summary

Fixed type definitions for the lifespan feature.

Summary

Upgrade python‑multipart to 0.0.6 and Starlette to the latest version, adding new lifespan‑with‑state support.

Summary

Add async context manager support for application lifespan, superseding separate startup/shutdown events.

Summary

Security fix addressing DoS vulnerability caused by many small multipart fields/files

Summary

Upgrade Starlette to version 0.24.0 with internal refactor for compatibility.

Summary

Upgrade Starlette dependency to allow version 0.23.1.

Summary

Upgrade Starlette to 0.23.0 and update tooling (isort, pre‑commit, Ubuntu version) for the docs workflow.

Summary

Fixed ignoring of Response classes in return type annotations.

Summary

Add support for declaring response models via function return type annotations, enabling validation, docs, client generation, and data filtering.

Summary

Upgrade Starlette to 0.22.0, fixing query‑parameter encoding in TestClient.

Summary

Switch TestClient to HTTPX (Starlette 0.21.0) with a migration helper, introducing potential breaking changes in test code.

Summary

Added official support for Python 3.11 and enabled its test suite.

Summary

Added and corrected many documentation translations (Portuguese, Chinese, French) and fixed grammar, typos, and broken links

Summary

Fixed string support for OpenAPI status codes (default, 1XX‑5XX).

Summary

Bump Starlette requirement to >=0.20.4, bringing upstream bug fixes.

Summary

Dropped Python 3.6 support; minimum required version is now Python 3.7.

Summary

Added include/exclude support for dataclasses in the jsonable encoder.

Summary

Added new features: exported WebSocketState, support for Python internal descriptions in Pydantic model docstrings, and enhanced ORJSONResponse to handle non‑string keys and NumPy arrays.

Summary

Add ReDoc <noscript> warning, support for FrozenSet in parameters, allow custom middlewares to raise HTTPExceptions, and preserve JSONDecodeError details for better error handling.

Summary

Breaking: response models now raise an internal server error when a path returns None but the model doesn’t allow null, enforcing contract validation.

Summary

Fixed jsonable encoder handling of include/exclude for non-Pydantic objects and corrected repeated alias edge case in OpenAPI.

Summary

Fix response body handling for 204, 304, and 1xx status codes to prevent RuntimeError in Uvicorn

Summary

Add support for omitting the default value when declaring required parameters (Path, Query, Header, Cookie, Body, Form, File), making them required without using ellipsis.

Summary

Upgrade Starlette from 0.19.0 to 0.19.1.

Summary

Upgrade Starlette from 0.18.0 to 0.19.0 and make the `content` argument mandatory for explicit `JSONResponse` (breaking change).

Summary

Upgrade Starlette dependency to v0.18.0

Summary

Upgrade third‑party packages to address security vulnerabilities (ujson CVE‑2021‑45958 and Swagger UI HTML injection).

Summary

Added Dutch and Persian/Farsi translations and configuration to notify Dutch translations.

Summary

Add support for a custom generate-unique-id function

Summary

Add route to request scope, enabling middleware and tools to extract route information.

Summary

Update AsyncExitStack to correctly propagate exceptions from dependencies with `yield`, introducing a breaking change for existing exception handling logic.

Summary

Add support for declaring UploadFile parameters without explicit File(), add enum support for tags, and allow hiding Query, Cookie, Header, and Path parameters from OpenAPI documentation

Summary

Added ability to configure Swagger UI parameters.

Summary

Add Python 3.9/3.10 docs and tests with version‑specific code tabs

Summary

Fixed JSON Schema generation for dataclasses to align with Pydantic 1.9.

Summary

Upgrade Starlette to 0.16.0, bringing bug fixes and minor breaking changes.

Summary

Added Trio support via AnyIO and upgraded Starlette to 0.15.0, introducing breaking changes to async internals.

Summary

Expanded sub‑dependency version ranges (aiofiles, Uvicorn, test tools, etc.) and raised the minimum Python requirement to 3.6.1, dropping backports for Python 3.7.

Summary

Added ORM read mode support for SQLModel relationship attributes

Summary

Added support for OpenAPI schema extensions per path operation, extra metadata parameters on FastAPI class, and description fields for security scheme classes.

Summary

Add dataclass support for request bodies and response models (including responses)

Summary

Added German and Portuguese translations for documentation pages.

Summary

Added ability to set response class to RedirectResponse or FileResponse and return URLs directly

Summary

Fixed request body JSON handling when the Content-Type header is missing, correcting a breaking change from 0.65.2 while preserving CSRF protection.

Summary

Added validation of the Content-Type header before parsing request bodies as JSON, fixing a CSRF vulnerability (CVE‑2021‑32677) when using cookie authentication.

Summary

Upgrade pydantic pinned version to mitigate CVE‑2021‑29510.

Summary

Breaking: Upgrade Starlette to 0.14.2 and migrate internal UJSONResponse.

Summary

Add support for multiple examples in request bodies and all parameter types (path, query, cookie, header).

Summary

Improve type annotations with mypy‑strict support

Summary

Add support for shared/top‑level router parameters (dependencies, tags, callbacks, default response class, etc.) in APIRouter and include_router, enabling configuration closer to the code.

Summary

Fixed bugs like Swagger UI version pin, custom HTTPException handling override, CI docs preview unzip, and multiple FastAPI People GitHub Action dependency issues.

Summary

Fixed jsonable encoder issue with SQLAlchemy models directly

Summary

Added support for injecting HTTPConnection into Request and WebSocket handlers and exported WebSocketDisconnect with a new docs example.

Summary

Enhanced documentation with typo corrections, new async tests guide, tutorial links, Ukrainian translation, and MkDocs Material update.

Summary

Added debugging logs for GitHub Actions and refined workflow steps (docs preview commit handling, Gitter bot refactor).

Summary

Added multiple GitHub Actions for CI, documentation preview, and artifact handling, replacing Travis CI

Summary

Added automatic OpenAPI server generation for root paths with a new FastAPI `root_path_in_servers` parameter and related docs updates.

Summary

Added Chinese translations for Body Fields, Body Multiple Parameters, and Path Parameters with numeric validations

Summary

Added deep‑merge of OpenAPI responses and support for OpenAPI servers

Summary

Added features: http.HTTPStatus support in status codes, OpenAPI tag metadata, Swagger UI showCommonExtensions, repr for parameter helpers, and direct import of OAuth2PasswordRequestFormStrict.

Summary

Enhanced documentation: added link to advanced docs, updated Python Types intro, added Microsoft project generator for spaCy/Azure, and added extensive Chinese and initial Italian translations.

Summary

Add built‑in ASGI root_path support for mounted FastAPI apps and introduce a new root_path parameter (usable via Uvicorn/Hypercorn CLI) so OpenAPI and docs UI work automatically.

Summary

Fix handling of enums with custom schemas in path parameters.

Summary

Add support for enums to have their own schemas in OpenAPI (feature).

Summary

Added Spanish, Portuguese, and Chinese translations for tutorials, features, benchmarks, and other documentation sections, and enabled Unicode support in MkDocs.

Summary

Updated database test setup

Summary

Fixed grammatical errors in async documentation and added new docs for testing a DB, contributing guide, translations, and settings handling.

Summary

Fixed automatic embedding of body fields for dependencies and sub‑dependencies and corrected dependency overrides in WebSocket tests

Summary

Fixed example handling after translations refactor and corrected recursive model usage in responses

Summary

Added `orjson` as an optional dependency (`fastapi[all]`) and expanded documentation with new external links, translation support, and terminal styling notes.

Summary

Introduce ORJSONResponse class for high‑performance JSON responses using orjson.

Summary

Re-export Starlette utilities (e.g., JSONResponse, Request, Response, WebSocket, status) so they can be imported directly from FastAPI.

Summary

Updated docs with links and guidance on pinning FastAPI and Starlette versions for deployment.