nginx config_error ai_generated true

map variable resolves to empty string

ID: nginx/map-variable-empty

Also available as: JSON · Markdown
80%Fix Rate
84%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1 active — — —

Root Cause

Nginx map directive variable resolving to empty due to missing default.

generic

Workarounds

  1. 90% success Add default value in map block: default "fallback_value";
  2. 88% success Test map values with add_header X-Debug-Map

Dead Ends

Common approaches that don't work:

  1. Set default to wildcard match 78% fail

    Catches everything, defeats purpose

  2. Remove map and hardcode values 72% fail

    Loses dynamic routing