module Locomotive module Liquid module LiquifyTemplate def self.included(base) base.extend(ClassMethods) end # Store the parsed version of a liquid template into a column in order to increase performance # See http://cjohansen.no/en/rails/liquid_email_templates_in_rails # # class Page # liquify_template :body # end # # page = Page.new :body => '...some liquid tags' # page.template # Liquid::Template # # module ClassMethods def liquify_template(source = :value) field :serialized_template, :type => Binary before_validate :store_template class_eval <<-EOV def liquify_template_source self.send(:#{source.to_s}) end EOV include InstanceMethods end end module InstanceMethods def template Marshal.load(read_attribute(:serialized_template).to_s) rescue nil end protected def store_template begin template = ::Liquid::Template.parse(self.liquify_template_source) self.serialized_template = BSON::Binary.new(Marshal.dump(template)) rescue ::Liquid::SyntaxError => error self.errors.add :template, :liquid_syntax_error end end end end end end