Ecto Model Schema Extension

product.ex

defmodule Nectar.ExtendProduct do
  defmacro extensions do
    quote do
      field :special, :boolean, virtual: true
    end
  end
end

defmodule Nectar.Product do
  import Nectar.ExtendProduct
  
  schema do
    extensions
  end
  
  ## Add #special boolean to get casted
  def changeset(model, params \\ :empty) do
    model
    |> cast(params, @required_fields, ~w(special))
  end
end