class AssetCollection include Locomotive::Mongoid::Document ## fields ## field :name field :slug ## associations ## referenced_in :site embeds_many :assets ## behaviours ## custom_fields_for :assets liquid_methods :name, :ordered_assets ## callbacks ## before_validation :normalize_slug before_save :store_asset_positions! ## validations ## validates_presence_of :site, :name, :slug validates_uniqueness_of :slug, :scope => :site_id ## methods ## def ordered_assets self.assets.sort { |a, b| (a.position || 0) <=> (b.position || 0) } end def assets_order self.ordered_assets.collect(&:id).join(',') end def assets_order=(order) @assets_order = order end protected def normalize_slug self.slug = self.name.clone if self.slug.blank? && self.name.present? self.slug.slugify! if self.slug.present? end def store_asset_positions! return if @assets_order.nil? @assets_order.split(',').each_with_index do |asset_id, index| self.assets.find(asset_id).position = index end self.assets.clone.each do |asset| if !@assets_order.split(',').include?(asset._id) self.assets.delete(asset) asset.send(:delete) end end end end