python runtime_error ai_generated true

AssertionError: View function mapping is overwriting an existing endpoint function: index

ID: python/flask-abort-assertion-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-03-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Multiple route decorators applied to the same function name or a view function registered twice with the same endpoint name.

generic

中文

多个路由装饰器应用于同一函数名，或同一端点名称注册了两次视图函数。

Workarounds

  1. 95% success 
    Specify different endpoint names in each decorator: @app.route('/a', endpoint='a_func') and @app.route('/b', endpoint='b_func')
  2. 90% success 
    Use unique function names for each route: def index_a(): return 'A' and def index_b(): return 'B'

Dead Ends

Common approaches that don't work:

  1. 60% fail

    The endpoint defaults to the function name; if the path is the same, Flask still sees a conflict if the old function isn't removed.

  2. 80% fail

    Flask uses the function name as the endpoint by default, causing overwrite unless explicit endpoint is given.