class Route < ActiveRecord::Base
belongs_to :source, polymorphic: true
validates :source, presence: true
validates :path,
length: { within: 1..255 },
presence: true,
uniqueness: { case_sensitive: false }
after_update :rename_children, if: :path_changed?
def rename_children
# We update each row separately because MySQL does not have regexp_replace.
# rubocop:disable Rails/FindEach
Route.where('path LIKE ?', "#{path_was}%").each do |route|
# Note that update column skips validation and callbacks.
# We need this to avoid recursive call of rename_children method
route.update_column(:path, route.path.sub(path_was, path))
end
end
end