Edge resolution with dataloader

resolver.ex

import Absinthe.Resolution.Helpers

connection field :contracts, node_type: :contract do
  resolve fn %{id: project_id}, args, %{context: %{current_user: current_user}, dataloader: loader} ->  
    loader
    |> Dataloader.load_many(Engagement, :contract_ids_for_project_id, project_id)
    |> on_load(fn loader ->
      {
        :ok,
        Connection.from_list(
          Dataloader.get_many(loader, Engagement, :contract_ids_for_project_id, project_id),
          Map.put(args, :project_contract, true)
        )
      }
    end)
  end
end