线程奇怪的django ORM行为

Question

我想要在Django项目中启动的线程中访问查询集结果时发生了一些非常奇怪的事情。

问题引起的是，在线程的init一切工作正常，但是当我完成run（）方法中应该是相同的动作 - 它们返回空。代码和结果如下。

任何想法如何解决这种奇怪的行为，将不胜感激。

CODE：

class FinalDataCreator(threading.Thread): 

    def __init__(self, final_form_entry, **kwargs): 

      print "WORKS", final_form_entry.user_form_entries.all() 

      self.final_form_entry = final_form_entry 
      print "WORKS", self.final_form_entry.user_form_entries.all() 

      self.weirdest_thing = self.final_form_entry.user_form_entries.all() 

      self.jondykeman = "JonDykeman" 

      super(FinalDataCreator, self).__init__(**kwargs) 

     def run(self): 

      print "EMPTY", self.final_form_entry.user_form_entries.all() 

      print "EMPTY", self.weirdest_thing 

      print "WORKS", self.jondykeman 

      print "WORKS", self.final_form_entry 

new_test = FinalDataCreator(final_form_entry) 
new_test.start() 

结果再次

WORKS [<ReviewCustomFormEntry: ReviewCustomFormEntry object>] 
WORKS [<ReviewCustomFormEntry: ReviewCustomFormEntry object>] 
EMPTY [] 
EMPTY [] 
WORKS "JonDykeman" 
WORKS ReviewCustomFormEntry 

感谢，JD

Answer 1

如果你读线程类的Python27的文档\ LIB \ threading.py它说.. 。

If a subclass overrides the constructor, it must make sure to invoke 
the base class constructor (Thread.__init__()) before doing anything 
else to the thread. 

So查NGE你的代码像

class FinalDataCreator(threading.Thread): 

def __init__(self, final_form_entry, **kwargs): 

     super(FinalDataCreator, self).__init__(**kwargs) #why you need to pass **kwargs 

     print "WORKS", final_form_entry.user_form_entries.all() 

     self.final_form_entry = final_form_entry 
     print "WORKS", self.final_form_entry.user_form_entries.all() 

     self.weirdest_thing = self.final_form_entry.user_form_entries.all() 

    def run(self): 

     print "EMPTY", self.final_form_entry.user_form_entries.all() 

     print "EMPTY", self.weirdest_thing 

然后运行代码