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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_descendants, if: :path_changed?
def rename_descendants
# 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_descendants method
route.update_column(:path, route.path.sub(path_was, path))
end
# rubocop:enable Rails/FindEach
end
end
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