Absinthe graphql: testing and displaying changeset errors

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5

this solution worked well for me based on brian’s answer

  def handle_errors(fun) do
    fn source, args, info ->
      case Absinthe.Resolution.call(fun, source, args, info) do
        {:error, %Ecto.Changeset{} = changeset} -> format_changeset(changeset)
        val -> val
      end
    end
  end

  def format_changeset(changeset) do
    #{:error, [email: {"has already been taken", []}]}
    errors = changeset.errors
      |> Enum.map(fn({key, {value, context}}) -> 
           [message: "#{key} #{value}", details: context]
         end)
    {:error, errors}
  end
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