noDuplicateFields

Property	Value
Config name	noDuplicateFields
Default severity	warn
Context	Document
In recommended	Yes

What it checks

Disallow duplicate fields in selection sets.

Examples

# ❌ Bad — duplicate field
query GetUser {
  user {
    id
    name
    id
  }
}

# ✅ Good — no duplicates
query GetUser {
  user {
    id
    name
  }
}

Configuration

extensions:
  graphql-analyzer:
    lint:
      rules:
        noDuplicateFields: warn