class CreatePermissions < ActiveRecord::Migration[5.2]
  def up
    if !table_exists?(:permissions)
      create_table(:permissions) do |t|
        t.belongs_to :resource, polymorphic: true
        t.integer Recurso.identity_foreign_key
        t.integer :level, default: 0
        t.timestamps
      end

      add_index :permissions, [:user_id]
      add_index :permissions, [:resource_type, :resource_id]
      add_index :permissions, [:user_id, :resource_type, :resource_id]
    end
  end
end