python config_error ai_generated true

ScopeMismatch: 你尝试在 session 作用域的请求对象中访问 function 作用域的 fixture db

ScopeMismatch: You tried to access the function scoped fixture db with a session scoped request object

ID: python/pytest-scope-mismatch

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80%修复率
87%置信度
0证据数
2024-09-12首次发现

版本兼容性

版本状态引入弃用备注
7.x active — — —
8.x active — — —

根因分析

session 作用域的 fixture 依赖了 function 作用域的 fixture，这是不允许的，因为 session fixture 的生命周期长于 function fixture。

English

A session-scoped fixture depends on a function-scoped fixture, which is not allowed because the session fixture outlives the function fixture.

generic

解决方案

  1. 90% 成功率 
    Promote the dependency to a compatible scope:
@pytest.fixture(scope='session')
def db():
    ...
  2. 88% 成功率 
    Or demote the dependent fixture to function scope:
@pytest.fixture(scope='function')
def client(db):
    ...

无效尝试

常见但无效的做法:

  1. 60% 失败

    Defaults to function scope, which is the same problem.

  2. 70% 失败

    Does not change scope compatibility.