ecto_bitstring_type.ex

if Code.ensure_loaded?(Ecto.Type) do
  defmodule Bitstring do
    @moduledoc """
    Implements the Ecto.Type behaviour for the Postgres
    type "bit varying"

    """

    use Ecto.Type

    def type do
      :"bit varying"
    end

    # When loading from the database
    def load(tuple, loader \\ nil, params \\ [])

    def load(nil, _loader, _params) do
      {:ok, nil}
    end

    def load(bitstring, _loader, _params) do
      {:ok, bitstring}
    end

    # Dumping to the database.
    def dump(bitstring, dumper \\ nil, params \\ [])

    def dump(bitstring, _dumper, _params) when is_bitstring(bitstring) do
      {:ok, bitstring}
    end

    def dump(nil, _, _) do
      {:ok, nil}
    end

    def dump(_, _, _) do
      :error
    end

    # Casting in changesets
    def cast(bitstring, params \\ [])

    def cast(nil, _params) do
      {:ok, nil}
    end

    def cast(bitstring, _params) when is_bitstring(bitstring) do
      {:ok, bitstring}
    end

    def cast(_bitstring, _params) do
      :error
    end
  end
end