python config_error ai_generated true

werkzeug.routing.exceptions.BuildError: Could not build url for endpoint 'user_profile' with values ['user_id']. Did you mean 'user' instead?

ID: python/flask-werkzeug-build-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-11-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The endpoint name or parameters provided to url_for do not match any registered route.

generic

中文

提供给 url_for 的端点名称或参数与任何已注册的路由不匹配。

Workarounds

  1. 95% success Check the endpoint name and parameters 
    print(app.url_map)  # list all routes
url_for('user_profile', user_id=123)  # correct usage
  2. 90% success Use the endpoint parameter in route decorator 
    @app.route('/user/<int:user_id>', endpoint='user_profile')
def user(user_id):
    return ...

Dead Ends

Common approaches that don't work:

  1. Using url_for with wrong parameter names 90% fail

    Parameter names must match the route exactly.

  2. Assuming the endpoint name is the function name 80% fail

    Endpoint names can be customized.