Ruby on Rails

I have one sudo code here, using delayedjob with rails, actually tired but in some cases it getting weird, i want to call the first delay and after that is finished, then only start second delay, so i have used the priority. Is this the proper way to do this or is anything wrong?

class Core    def foo      priority = 0      if condition1        if condition2          self.delay(priority: priority).foo1(priority)        end        self.delay(priority: priority).foo1(priority)      end    end      def foo1(priority)      if condition1        if condition2          priority +=1          self.delay(priority: priority).foo1(priority)        end        priority +=1        self.delay(priority: priority).foo1(priority)      end    end  end