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DataMapper

Test

A macro module and behaviour with default mapping implementations.

The docs can be found at https://hexdocs.pm/data_mapper.

Installation

The package can be installed by adding data_mapper to your list of dependencies in mix.exs:

def deps do
  [
    {:data_mapper, "~> 0.1.0"}
  ]
end

Usage

defmodule FooMapper do
  @moduledoc """
  Map the Foo external data to our own data structures.
  """
  use DataMapper,
    mappings: %{
      "someFoo" => :foo,
      "someBar" => :bar,
      "extraThing" => :extra_thing
    }

  @impl DataMapper

  def map_field({_, nil} = field), do: field

  def map_field({:bar, field}) do
    {:bar, field * 1000}
  end

  def map_field(field), do: field
end

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