models.py 文件源码

def assign_task(self, worker_id=None):
        """Assign the task to a worker identified by worker_id."""
        if worker_id is None:
            worker_id = self.worker_id

        try:
            self.__lock(worker_id, new_state=TASK_STATES["ASSIGNED"], initial_states=(TASK_STATES["FREE"], TASK_STATES["CREATED"]))
        except (MultipleObjectsReturned, ObjectDoesNotExist):
            raise Exception("Cannot assign task %d" % (self.id))