mutations-inputs-unique.md

Mutations must return unique input types (mutations-inputs-unique)

All mutations must return a unique input type

Rule Details

Best practice is to have a unique Input type for every mutation. This allows us to modify any mutation input without worrying about breaking others.

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Examples of incorrect code for this rule:

type Mutation {
  sampleMutation(input: SampleMutationInput!): SampleMutationPayload
  secondMutation(input: SampleMutationInput!): SecondMutationPayload
}

Examples of correct code for this rule:

type Mutation {
  sampleMutation(input: SampleMutationInput!): SampleMutationPayload
  secondMutation(input: SecondMutationInput!): SecondMutationPayload
  arglessMutation: ThirdMutationPayload
}