python config_error ai_generated true

werkzeug.routing.exceptions.BuildError: Could not build url for endpoint 'index'

ID: python/flask-url-build-error-endpoint

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-04-12First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The endpoint name is misspelled or the route does not exist.

generic

中文

端点名称拼写错误或路由不存在。

Workarounds

  1. 90% success Check the defined routes and ensure the endpoint name is correct. 
    print(app.url_map)  # List all routes and endpoints
  2. 95% success Use the correct endpoint name in url_for. 
    url_for('home')  # Replace 'home' with the actual endpoint

Dead Ends

Common approaches that don't work:

  1. Adding a random URL parameter to the url_for function. 80% fail

    The endpoint still does not exist; parameters only work for existing routes.

  2. Using the function name instead of the endpoint name incorrectly. 60% fail

    If the endpoint is explicitly set, the function name may not match.