key-duplicates.md

Pattern: Duplicate mapping key

Issue: -

Description

This rule checks for multiple entries with the same key in mappings.

Examples

1. With key-duplicates: {}

   the following code snippet would PASS:

   - key 1: v
     key 2: val
     key 3: value
   - {a: 1, b: 2, c: 3}
   

   the following code snippet would FAIL:

   - key 1: v
     key 2: val
     key 1: value
   

   the following code snippet would FAIL:

   - {a: 1, b: 2, b: 3}
   

   the following code snippet would FAIL:

   duplicated key: 1
   "duplicated key": 2
   
   other duplication: 1
   ? >-
       other
       duplication
   : 2
   

Further Reading

• Yamllint - key_duplicates