Example creation/update

schema.ex

defmodule MyApp.Schema do
  use Absinthe.Schema
  
  mutation do
    field :create_user, :user do
      arg :input, :user_creation
      resolve fn
        _, %{input: input}, _ ->
          # create from `input`, assign `user`
          {:ok, user}
      end
    end
    field :update_user, :user do
      arg :id, :id
      arg :input, :user_change
      resolve fn
        _, %{id: id, input: input}, _ ->
          # lookup from `id`, update from `input`, assign `user`
          {:ok, user}
      end
    end
  end
  
  object :user do
    field :id, :id
    field :name, :string
  end
  
  input_object :user_creation do
    field :name, :string
    field :email, :string
  end
  
  input_object :user_change do
    field :name, :string
  end
  
end