Basic ActiveRecord in Elixir Ecto (as Macro)

active_record_macro.ex

defmodule BasicApp.ActiveRecord do
  defmacro __using__(_) do
    quote do
      alias BasicApp.Repo

      def all(opts \\ []) do
        Repo.all __MODULE__, opts
      end

      def find(clauses, opts \\ []) do
        Enum.filter all(opts), fn map ->
          Enum.all?(clauses, fn {key, val} -> Map.get(map, key) == val end)
        end
      end

      def get(id, opts \\ []) do
        Repo.get __MODULE__, id, opts
      end

      def get_by(clauses, opts \\ []) do
        Repo.get_by __MODULE__, clauses, opts
      end
    end
  end
end