Fastapi

* Add GitHub Action to watch for missing preview docs and trigger a preview deploy. PR [1740](https://github.com/tiangolo/fastapi/pull/1740).
* Add custom GitHub Action to get artifact with docs preview. PR [1739](https://github.com/tiangolo/fastapi/pull/1739).
* Add new GitHub Actions to preview docs from PRs. PR [1738](https://github.com/tiangolo/fastapi/pull/1738).
* Add XML test coverage to support GitHub Actions. PR [1737](https://github.com/tiangolo/fastapi/pull/1737).
* Update badges and remove Travis now that GitHub Actions is the main CI. PR [1736](https://github.com/tiangolo/fastapi/pull/1736).
* Add GitHub Actions for CI, move from Travis. PR [1735](https://github.com/tiangolo/fastapi/pull/1735).
* Add support for adding OpenAPI schema for GET requests with a body. PR [1626](https://github.com/tiangolo/fastapi/pull/1626) by [victorphoenix3](https://github.com/victorphoenix3).

* Fix typo in docstring for OAuth2 utils. PR [1621](https://github.com/tiangolo/fastapi/pull/1621) by [tomarv2](https://github.com/tomarv2).
* Update JWT docs to use Python-jose instead of PyJWT. Initial PR [1610](https://github.com/tiangolo/fastapi/pull/1610) by [asheux](https://github.com/asheux).
* Fix/re-enable search bar in docs. PR [1703](https://github.com/tiangolo/fastapi/pull/1703).
* Auto-generate a "server" in OpenAPI `servers` when there's a `root_path` instead of prefixing all the `paths`:
* Add a new parameter for `FastAPI` classes: `root_path_in_servers` to disable the auto-generation of `servers`.
* New docs about `root_path` and `servers` in [Additional Servers](https://fastapi.tiangolo.com/advanced/behind-a-proxy/#additional-servers).
* Update OAuth2 examples to use a relative URL for `tokenUrl="token"` to make sure those examples keep working as-is even when behind a reverse proxy.
* Initial PR [1596](https://github.com/tiangolo/fastapi/pull/1596) by [rkbeatss](https://github.com/rkbeatss).
* Fix typo/link in External Links. PR [1702](https://github.com/tiangolo/fastapi/pull/1702).
* Update handling of [External Links](https://fastapi.tiangolo.com/external-links/) to use a data file and allow translating the headers without becoming obsolete quickly when new links are added. PR [#https://github.com/tiangolo/fastapi/pull/1701](https://github.com/tiangolo/fastapi/pull/1701).
* Add external link [Machine learning model serving in Python using FastAPI and Streamlit](https://davidefiocco.github.io/2020/06/27/streamlit-fastapi-ml-serving.html) to docs. PR [#1669](https://github.com/tiangolo/fastapi/pull/1669) by [davidefiocco](https://github.com/davidefiocco).
* Add note in docs on order in Pydantic Unions. PR [1591](https://github.com/tiangolo/fastapi/pull/1591) by [kbanc](https://github.com/kbanc).
* Improve support for tests in editor. PR [1699](https://github.com/tiangolo/fastapi/pull/1699).
* Pin dependencies. PR [1697](https://github.com/tiangolo/fastapi/pull/1697).
* Update isort to version 5.x.x. PR [1670](https://github.com/tiangolo/fastapi/pull/1670) by [asheux](https://github.com/asheux).

* Add link in docs to Pydantic data types. PR [1612](https://github.com/tiangolo/fastapi/pull/1612) by [tayoogunbiyi](https://github.com/tayoogunbiyi).
* Fix link in warning logs for `openapi_prefix`. PR [1611](https://github.com/tiangolo/fastapi/pull/1611) by [bavaria95](https://github.com/bavaria95).
* Fix bad link in docs. PR [1603](https://github.com/tiangolo/fastapi/pull/1603) by [molto0504](https://github.com/molto0504).
* Add Vim temporary files to `.gitignore` for contributors using Vim. PR [1590](https://github.com/tiangolo/fastapi/pull/1590) by [asheux](https://github.com/asheux).
* Fix typo in docs for sub-applications. PR [1578](https://github.com/tiangolo/fastapi/pull/1578) by [schlpbch](https://github.com/schlpbch).
* Use `Optional` in all the examples in the docs. Original PR [1574](https://github.com/tiangolo/fastapi/pull/1574) by [chrisngyn](https://github.com/chrisngyn), [kx-chen](https://github.com/kx-chen), [YKo20010](https://github.com/YKo20010). Updated and merged PR [#1644](https://github.com/tiangolo/fastapi/pull/1644).
* Update tests and handling of `response_model_by_alias`. PR [1642](https://github.com/tiangolo/fastapi/pull/1642).
* Add translation to Chinese for [Body - Fields - 请求体 - 字段](https://fastapi.tiangolo.com/zh/tutorial/body-fields/). PR [#1569](https://github.com/tiangolo/fastapi/pull/1569) by [waynerv](https://github.com/waynerv).
* Update Chinese translation of main page. PR [1564](https://github.com/tiangolo/fastapi/pull/1564) by [waynerv](https://github.com/waynerv).
* Add translation to Chinese for [Body - Multiple Parameters - 请求体 - 多个参数](https://fastapi.tiangolo.com/zh/tutorial/body-multiple-params/). PR [#1532](https://github.com/tiangolo/fastapi/pull/1532) by [waynerv](https://github.com/waynerv).
* Add translation to Chinese for [Path Parameters and Numeric Validations - 路径参数和数值校验](https://fastapi.tiangolo.com/zh/tutorial/path-params-numeric-validations/). PR [#1506](https://github.com/tiangolo/fastapi/pull/1506) by [waynerv](https://github.com/waynerv).
* Add GitHub action to auto-label approved PRs (mainly for translations). PR [1638](https://github.com/tiangolo/fastapi/pull/1638).

* Deep merge OpenAPI responses to preserve all the additional metadata. PR [1577](https://github.com/tiangolo/fastapi/pull/1577).
* Mention in docs that only main app events are run (not sub-apps). PR [1554](https://github.com/tiangolo/fastapi/pull/1554) by [amacfie](https://github.com/amacfie).
* Fix body validation error response, do not include body variable when it is not embedded. PR [1553](https://github.com/tiangolo/fastapi/pull/1553) by [amacfie](https://github.com/amacfie).
* Fix testing OAuth2 security scopes when using dependency overrides. PR [1549](https://github.com/tiangolo/fastapi/pull/1549) by [amacfie](https://github.com/amacfie).
* Fix Model for JSON Schema keyword `not` as a JSON Schema instead of a list. PR [1548](https://github.com/tiangolo/fastapi/pull/1548) by [v-do](https://github.com/v-do).
* Add support for OpenAPI `servers`. PR [1547](https://github.com/tiangolo/fastapi/pull/1547) by [mikaello](https://github.com/mikaello).

* Remove broken link from "External Links". PR [1565](https://github.com/tiangolo/fastapi/pull/1565) by [victorphoenix3](https://github.com/victorphoenix3).
* Update/fix docs for [WebSockets with dependencies](https://fastapi.tiangolo.com/advanced/websockets/#using-depends-and-others). Original PR [1540](https://github.com/tiangolo/fastapi/pull/1540) by [ChihSeanHsu](https://github.com/ChihSeanHsu).
* Add support for Python's `http.HTTPStatus` in `status_code` parameters. PR [1534](https://github.com/tiangolo/fastapi/pull/1534) by [retnikt](https://github.com/retnikt).
* When using Pydantic models with `__root__`, use the internal value in `jsonable_encoder`. PR [1524](https://github.com/tiangolo/fastapi/pull/1524) by [patrickkwang](https://github.com/patrickkwang).
* Update docs for path parameters. PR [1521](https://github.com/tiangolo/fastapi/pull/1521) by [yankeexe](https://github.com/yankeexe).
* Update docs for first steps, links and rewording. PR [1518](https://github.com/tiangolo/fastapi/pull/1518) by [yankeexe](https://github.com/yankeexe).
* Enable `showCommonExtensions` in Swagger UI to show additional validations like `maxLength`, etc. PR [1466](https://github.com/tiangolo/fastapi/pull/1466) by [TiewKH](https://github.com/TiewKH).
* Make `OAuth2PasswordRequestFormStrict` importable directly from `fastapi.security`. PR [1462](https://github.com/tiangolo/fastapi/pull/1462) by [RichardHoekstra](https://github.com/RichardHoekstra).
* Add docs about [Default response class](https://fastapi.tiangolo.com/advanced/custom-response/#default-response-class). PR [1455](https://github.com/tiangolo/fastapi/pull/1455) by [TezRomacH](https://github.com/TezRomacH).
* Add note in docs about additional parameters `response_model_exclude_defaults` and `response_model_exclude_none` in [Response Model](https://fastapi.tiangolo.com/tutorial/response-model/#use-the-response_model_exclude_unset-parameter). PR [1427](https://github.com/tiangolo/fastapi/pull/1427) by [wshayes](https://github.com/wshayes).
* Add note about [PyCharm Pydantic plugin](https://github.com/koxudaxi/pydantic-pycharm-plugin) to docs. PR [#1420](https://github.com/tiangolo/fastapi/pull/1420) by [koxudaxi](https://github.com/koxudaxi).
* Update and clarify testing function name. PR [1395](https://github.com/tiangolo/fastapi/pull/1395) by [chenl](https://github.com/chenl).
* Fix duplicated headers created by indirect dependencies that use the request directly. PR [1386](https://github.com/tiangolo/fastapi/pull/1386) by [obataku](https://github.com/obataku) from tests by [scottsmith2gmail](https://github.com/scottsmith2gmail).
* Upgrade Starlette version to `0.13.4`. PR [1361](https://github.com/tiangolo/fastapi/pull/1361) by [rushton](https://github.com/rushton).
* Improve error handling and feedback for requests with invalid JSON. PR [1354](https://github.com/tiangolo/fastapi/pull/1354) by [aviramha](https://github.com/aviramha).
* Add support for declaring metadata for tags in OpenAPI. New docs at [Tutorial - Metadata and Docs URLs - Metadata for tags](https://fastapi.tiangolo.com/tutorial/metadata/#metadata-for-tags). PR [1348](https://github.com/tiangolo/fastapi/pull/1348) by [thomas-maschler](https://github.com/thomas-maschler).
* Add basic setup for Russian translations. PR [1566](https://github.com/tiangolo/fastapi/pull/1566).
* Remove obsolete Chinese articles after adding official community translations. PR [1510](https://github.com/tiangolo/fastapi/pull/1510) by [waynerv](https://github.com/waynerv).
* Add `__repr__` for *path operation function* parameter helpers (like `Query`, `Depends`, etc) to simplify debugging. PR [1560](https://github.com/tiangolo/fastapi/pull/1560) by [rkbeatss](https://github.com/rkbeatss) and [victorphoenix3](https://github.com/victorphoenix3).

* Add link to advanced docs from tutorial. PR [1512](https://github.com/tiangolo/fastapi/pull/1512) by [kx-chen](https://github.com/kx-chen).
* Remove internal unnecessary f-strings. PR [1526](https://github.com/tiangolo/fastapi/pull/1526) by [kotamatsuoka](https://github.com/kotamatsuoka).
* Add translation to Chinese for [Query Parameters and String Validations - 查询参数和字符串校验](https://fastapi.tiangolo.com/zh/tutorial/query-params-str-validations/). PR [#1500](https://github.com/tiangolo/fastapi/pull/1500) by [waynerv](https://github.com/waynerv).
* Add translation to Chinese for [Request Body - 请求体](https://fastapi.tiangolo.com/zh/tutorial/body/). PR [#1492](https://github.com/tiangolo/fastapi/pull/1492) by [waynerv](https://github.com/waynerv).
* Add translation to Chinese for [Help FastAPI - Get Help - 帮助 FastAPI - 获取帮助](https://fastapi.tiangolo.com/zh/help-fastapi/). PR [#1465](https://github.com/tiangolo/fastapi/pull/1465) by [waynerv](https://github.com/waynerv).
* Add translation to Chinese for [Query Parameters - 查询参数](https://fastapi.tiangolo.com/zh/tutorial/query-params/). PR [#1454](https://github.com/tiangolo/fastapi/pull/1454) by [waynerv](https://github.com/waynerv).
* Add translation to Chinese for [Contributing - 开发 - 贡献](https://fastapi.tiangolo.com/zh/contributing/). PR [#1460](https://github.com/tiangolo/fastapi/pull/1460) by [waynerv](https://github.com/waynerv).
* Add translation to Chinese for [Path Parameters - 路径参数](https://fastapi.tiangolo.com/zh/tutorial/path-params/). PR [#1453](https://github.com/tiangolo/fastapi/pull/1453) by [waynerv](https://github.com/waynerv).
* Add official Microsoft project generator for [serving spaCy with FastAPI and Azure Cognitive Skills](https://github.com/microsoft/cookiecutter-spacy-fastapi) to [Project Generators](https://fastapi.tiangolo.com/project-generation/). PR [#1390](https://github.com/tiangolo/fastapi/pull/1390) by [kabirkhan](https://github.com/kabirkhan).
* Update docs in [Python Types Intro](https://fastapi.tiangolo.com/python-types/) to include info about `Optional`. Original PR [#1377](https://github.com/tiangolo/fastapi/pull/1377) by [yaegassy](https://github.com/yaegassy).
* Fix support for callable class dependencies with `yield`. PR [1365](https://github.com/tiangolo/fastapi/pull/1365) by [mrosales](https://github.com/mrosales).
* Fix/remove incorrect error logging when a client sends invalid payloads. PR [1351](https://github.com/tiangolo/fastapi/pull/1351) by [dbanty](https://github.com/dbanty).
* Add translation to Chinese for [First Steps - 第一步](https://fastapi.tiangolo.com/zh/tutorial/first-steps/). PR [#1323](https://github.com/tiangolo/fastapi/pull/1323) by [waynerv](https://github.com/waynerv).
* Fix generating OpenAPI for apps using callbacks with routers including Pydantic models. PR [1322](https://github.com/tiangolo/fastapi/pull/1322) by [nsidnev](https://github.com/nsidnev).
* Optimize internal regex performance in `get_path_param_names()`. PR [1243](https://github.com/tiangolo/fastapi/pull/1243) by [heckad](https://github.com/heckad).
* Remove `*,` from functions in docs where it's not needed. PR [1239](https://github.com/tiangolo/fastapi/pull/1239) by [pankaj-giri](https://github.com/pankaj-giri).
* Start translations for Italian. PR [1557](https://github.com/tiangolo/fastapi/pull/1557) by [csr](https://github.com/csr).