defmodule Comfycamp.Repo.Migrations.AddUsernames do
  use Ecto.Migration

  def change do
    alter table(:users) do
      add :username, :citext
    end

    execute("""
    UPDATE users
    SET username = email
    """)

    alter table(:users) do
      modify :username, :citext, null: false
    end
  end
end