Example resolver helper for pulling data from another source field

schema.ex

defmodule ExampleSchema do
  use Absinthe.Schema
  
  # rest of schema

  object :message do
    field :date, :datetime do
      resolve source_field(:inserted_at)
    end
  end

  def source_field(name) do
    fn source, _, _ ->
      {:ok, Map.get(source, name)}
    end
  end
  
end