orbit4-5/app/models/orbit_observer.rb

class OrbitObserver < Mongoid::Observer
	models_to_cache =  OrbitApp.get_models_for_caching
	observe models_to_cache.keys

	def after_save(document)
		clear_cache(document)
	end

	def after_destroy(document)
		clear_cache(document)
	end

	def clear_cache(document)
		model_module_hash = OrbitApp.get_model_hash_for_caching
		case document.class.to_s
		when 'Tag'
			document.module_app.each do |module_app|
				Rails.cache.delete_matched( /#{ module_app.key }/ )
			end
		when 'Category'
			Rails.cache.delete_matched( /#{ document.module_app.key }/ )
		else
			Rails.cache.delete_matched( /#{model_module_hash[document.class.name.underscore.to_sym]}/ )
		end
	end
end