noDuplicateInputFieldNames

GraphQL

Summary

• Rule available since: v2.3.11
• Diagnostic Category: lint/correctness/noDuplicateInputFieldNames
• This rule is recommended, meaning it is enabled by default.
• This rule doesn’t have a fix.
• The default severity of this rule is error.
• Sources:
  • Same as @graphql-eslint/unique-input-field-names

How to configure

biome.json

{
  "linter": {
    "rules": {
      "correctness": {
        "noDuplicateInputFieldNames": "error"
      }
    }
  }
}

Description

Require fields within an input object to be unique.

A GraphQL input object value is only valid if all supplied fields are uniquely named.

Examples

Invalid

query {
  field(arg: { f1: "value", f1: "value" })
}

code-block.graphql:2:14 lint/correctness/noDuplicateInputFieldNames ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Duplicate input field name.
  
    1 │ query {
  > 2 │   field(arg: { f1: “value”, f1: “value” })
      │              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    3 │ }
    4 │ 
  
  ℹ A GraphQL input object value is only valid if all supplied fields are uniquely named. Make sure to name every input field differently.
  

Valid

query {
  field(arg: { f1: "value", f2: "value" })
}

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