elixir_test_macro_add.ex

defmodule MishkaDatabase.CRUD do

  defmacro __using__(opts) do
    quote(bind_quoted: [opts: opts]) do
      @interface_module opts
    end
  end
  
  defmacro crud_add(attrs) do
    quote do
      module_selected = Keyword.get(@interface_module, :module)
      error_atom =  Keyword.get(@interface_module, :error_atom)
      repo =  Keyword.get(@interface_module, :repo)

      add = module_selected.__struct__
      |> module_selected.changeset(unquote(attrs))
      |> repo.insert()
      case add do
        {:ok, data}             -> {:ok, error_atom, data}
        {:error, changeset}     -> {:error, error_atom, changeset}
      end
    end
  end
end