python runtime_error ai_generated true

Werkzeug 路由错误:无法为端点 'external' 构建 URL,包含值 ['scheme', 'host']。你是想用 'index' 吗?

werkzeug.routing.BuildError: Could not build url for endpoint 'external' with values ['scheme', 'host']. Did you mean 'index' instead?

ID: python/flask-url-for-external-scheme

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80%修复率
84%置信度
0证据数
2024-09-01首次发现

版本兼容性

版本状态引入弃用备注
3.x active

根因分析

尝试使用 url_for 引用不存在的端点,或提供了路由中未定义的额外参数。

English

Attempting to use url_for with an endpoint that doesn't exist or with extra parameters not defined in the route.

generic

解决方案

  1. 100% 成功率
    Define the route correctly: @app.route('/external') def external(): return 'ok', then use url_for('external')
  2. 80% 成功率
    If external URL needed, use url_for('index', _external=True) if index exists

无效尝试

常见但无效的做法:

  1. 90% 失败

    The endpoint still doesn't exist; _external only affects the URL scheme.

  2. 80% 失败

    These are not valid parameters for route building unless defined in the route.