noDuplicateFields

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GraphQL

Summary

Rule available since: v1.9.0
Diagnostic Category: lint/suspicious/noDuplicateFields
This rule is recommended, which means is enabled by default.
This rule doesn’t have a fix.
The default severity of this rule is information.
Sources:
- Same as graphql/no-duplicate-fields

Description

No duplicated fields in GraphQL operations.

Checks for duplicate fields in selection set, variables in operation definition, or in arguments set of a field.

Examples

Invalid

1
query test($v: String, $t: String, $v: String) {
2
  id
3
}

code-block.graphql:1:36 lint/suspicious/noDuplicateFields ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ Variable v defined multiple times.
  
  > 1 │ query test($v: String, $t: String, $v: String) {
      │                                    ^^^^^^^^^^
    2 │   id
    3 │ }
  
  ℹ Remove the duplicated variable.

Valid

1
query {
2
  user {
3
    id
4
  }
5
}

How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "suspicious": {
5
        "noDuplicateFields": "error"
6
      }
7
    }
8
  }
9
}