python config_error ai_generated true

断言错误：依赖覆盖未生效，测试使用了真实数据库连接。

AssertionError: Dependency override for <function get_db at 0x...> was not applied; test used real database connection.

ID: python/fastapi-dependency-overrides-not-applied

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
0证据数
2025-06-15首次发现

版本兼容性

版本状态引入弃用备注
0.100.x active — — —
0.110.x active — — —

根因分析

app.dependency_overrides 使用的键与路由中实际使用的函数对象不同（例如模块被重新导入或依赖被包装）。

English

app.dependency_overrides keyed on a different function object than the one used in the route (e.g., re-imported module or wrapped dependency).

generic

解决方案

  1. 95% 成功率 
    from app.deps import get_db
app.dependency_overrides[get_db] = lambda: test_session
client = TestClient(app)
  2. 90% 成功率 
    Use `app.dependency_overrides.clear()` in teardown to avoid leakage between tests.

无效尝试

常见但无效的做法:

  1. 95% 失败

    FastAPI requires the callable object, not its name.

  2. 85% 失败

    TestClient uses the app passed to it; overrides elsewhere are ignored.