defmodule TestPhoenixLiveView.Messaging.Message do
  use Ecto.Schema
  import Ecto.Changeset

  schema "messages" do
    field :message, :string
    belongs_to :user, TestPhoenixLiveView.Accounts.User

    timestamps(type: :utc_datetime)
  end

  @doc false
  def changeset(message, attrs) do
    message
    |> cast(attrs, [:user_id, :message])
    |> validate_message
    |> validate_user
  end

  @doc false
  def validate_message(changeset) do
    changeset
    |> validate_required([:message])
    |> validate_length(:message, max: 160)
  end

  @doc false
  def validate_user(changeset) do
    changeset
    |> validate_required(:user_id)
    |> foreign_key_constraint(:user_id)
  end
end