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Exandra is an Elixir library that brings the power of Scylla/Cassandra to Ecto.

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exandra lib exandra types.ex
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lib/exandra/types.ex 

defmodule Exandra.Types do

  alias Exandra.Types.XMap

  alias Exandra.Types.XSet

  alias Exandra.Types.UDT



  def apply(type, op, value, opts) do

    cond do

      is_atom(type) and function_exported?(type, op, 1) ->

        apply(type, op, [value])



      is_atom(type) and function_exported?(type, op, 2) ->

        apply(type, op, [value, opts])



      true ->

        Ecto.Type.cast(type, value)

    end

  end



  def for(type, opts \\ [])



  def for(:id, _), do: :uuid

  def for(:binary_id, _), do: :uuid

  def for(:integer, _), do: :int

  def for(:string, _), do: :text

  def for(:binary, _), do: :blob

  def for(:map, _), do: :text



  def for(UDT, opts) do

    type = Keyword.get(opts, :type)



    if is_nil(type), do: raise(ArgumentError, "must define :type option for UDT column")



    "FROZEN<#{type}>"

  end



  def for(t, _opts) when t in [:datetime, :naive_datetime, :utc_datetime, :utc_datetime_usec],

    do: :timestamp



  def for({:parameterized, Ecto.Embedded, _}, _opts), do: :text

  def for({:parameterized, Ecto.Enum, _}, _opts), do: :text

  def for({:parameterized, XMap, opts}, _opts), do: XMap.xandra_type(opts)

  def for({:parameterized, XSet, opts}, _opts), do: XSet.xandra_type(opts)



  def for({:set, opts}, _opts), do: XSet.type(opts)



  def for(ecto_type, _opts) do

    if is_atom(ecto_type) and function_exported?(ecto_type, :type, 0) do

      ecto_type.type()

    else

      ecto_type

    end

  end

end