defmodule Ami.LessonMainResource do
  use Ecto.Schema

  import Ecto.{
    Query,
    Changeset
  }

  alias Ami.{
    Lesson,
    ResourceAttachment
  }

  schema "lesson_main_resources" do
    @timestamps_opts [type: :naive_datetime_usec]
    
    timestamps()
    belongs_to(:lesson, Lesson)
    belongs_to(:resource_attachment, ResourceAttachment)
  end

  def changeset(struct, params \\ %{}) do
    struct
    |> cast(params, [:lesson_id, :resource_attachment_id])
    |> cast_assoc(:resource_attachment)
  end
end