category.ex

defmodule MyApp.Category do
  use Ecto.Schema
  alias MyApp.Category

  schema "categories" do
    field :name, :string
    field :description, :string
    field :display_order, :integer

    embeds_many :children, Child, [on_replace: :delete] do
      belongs_to :category, Category
    end

    timestamps()
  end
end