defmodule Doorman.Device do
  use Ecto.Schema

  import Ecto.Changeset

  @primary_key {:id, :binary_id, autogenerate: true}

  @derive {Poison.Encoder, only: [:id, :token, :platform, :user_id, :last_sent, :inserted_at, :updated_at]}

  schema "devices" do
    field :token, :string
    field :platform, :string
    field :user_id, :binary_id
    field :last_sent, :utc_datetime

    timestamps()
  end

  @required_fields ~w(token platform)a
  @optional_fields ~w(user_id last_sent)a

  @doc """
  Creates a changeset based on the `model` and `params`.

  If no params are provided, an invalid changeset is returned
  with no validation performed.
  """
  def changeset(model, params \\ :empty) do
    model
    |> cast(params, @required_fields ++ @optional_fields)
    |> validate_required(@required_fields)
  end

end