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derive_mutation(command_module, return_type, opts \\ [])

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Defines an Absinthe mutation for a Command.


  • :as - The name to use for the mutation. Defaults to the query_module name snake_cased.
  • :then - A function/1 that accepts the result of the command execution. The function should return the standard Absinthe {:ok, response} or {:error, error} tuple.
  • :input_object? - true | false. Defaults to false
    • If true, one arg with the name of :input will be generated.
    • If true, an input_object for the Command is expected to exist. See derive_mutation_input/2.