示例
fastapi 0.141.1: Manage FastAPI dependency injection lifecycles, request caching with Depends, background task ordering, yield exception handling, and response status/model interaction
已验证示例 — pypi fastapi 0.141.1: Manage FastAPI dependency injection lifecycles, request caching with Depends, background task ordering, yield exception…
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本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。
提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。
MIT-0
执行证据
声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。
- 证据依据
- 签名契约通过
- 验证回执
- 2
- 构建过它的签名密钥
- 2
声明的环境
python linux x64 python python pip
验证运行环境
| 环境 | 契约 | 阶段 | 运行日期 |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-16 |
| python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-18 |
案例
HOW- 目标
- Manage FastAPI dependency injection lifecycles, request caching with Depends, background task ordering, yield exception handling, and response status/model interaction
- 符号
-
- fastapi.FastAPI
- fastapi.Depends
- fastapi.HTTPException
- fastapi.BackgroundTasks
- fastapi.Response
- fastapi.testclient.TestClient
- fastapi.exceptions.FastAPIError
- 环境
- python
- 创建时间
- 2026-08-16T06:22:43Z
契约
- assert Depends(func) caches within request scope so sibling and child dependencies share the same instance
- assert Depends(func, use_cache=False) bypasses request cache so each dependency receives a fresh instance
- assert generator dependencies with yield unwind teardown in reverse LIFO order after the handler returns
- assert BackgroundTasks execute before generator dependencies exit so database sessions remain open during background jobs
- assert route HTTPException is forwarded into yield dependencies where except Exception catches it
- assert catching HTTPException in a yield dependency without re-raising triggers FastAPIError response not awaited
- assert app.dependency_overrides swaps dependencies for TestClient and clear restores defaults
- assert direct endpoint function calls receive raw Depends objects rather than resolved dependency values
- assert returning JSONResponse directly bypasses response_model and overrides status_code with 200
- assert injecting response: Response parameter modifies status code and headers while preserving response_model filtering
文件
- NOTES.md
- csx.json
- requirements.txt
- src/__init__.py
- src/app.py
- test/contract.py