overrides the page method missing to attempt to find or update a field

Page.rb

module Shop
  module Models
    module Page
    
      def self.included(base)
        base.class_eval do
          
          # Returns the field with the name passed.
          # If a second parameter is passed the field content will be updated
          def field(name,*args)
            if new_record? or fields.any?(&:new_record?)
              field = fields.detect { |f| f.name.downcase == name.to_s.downcase }
            elsif !args.empty?
              field = fields.find_or_create_by_name name.to_s
              field.update_attribute(:content, args[0].to_s) 
            else
              field = fields.find_by_name name.to_s
            end
            
            field
          end
          
          def method_missing(method,*args,&block)
            begin
              field(method.to_s.gsub("=",""),*args)
            rescue
              super(method,*args,&block)
            end
          end
          
          def allowed_children_with_shop
            allowed_children_without_shop.reject { |p| p.name =~ /(Product|Order|LineItem)/ }
          end
          alias_method_chain :allowed_children, :shop
          
        end
      end
      
    end
  end
end