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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
def rename_descendants
if path_changed? || name_changed?
descendants = Route.where('path LIKE ?', "#{path_was}/%")
descendants.each do |route|
attributes = {}
if path_changed? && route.path.present?
attributes[:path] = route.path.sub(path_was, path)
end
if name_changed? && route.name.present?
attributes[:name] = route.name.sub(name_was, name)
end
# Note that update_columns skips validation and callbacks.
# We need this to avoid recursive call of rename_descendants method
route.update_columns(attributes) unless attributes.empty?
end
end
end
end
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