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Django 海关
原标题:Django Custom Manager

我看一下某些法典,我很奇怪,这是否好。

      class ToDoManager(models.Manager):
          def scheduled(self):
          """
          Returns QuerySet of all things to be done.
          """
          return self.filter(...)


      class ImpStuff(models.Model):
          ....model definition

          objects=TodoManager    

我总是看到,海关管理人员凌驾于“老板”方法之上。 这样做是不是解决问题的好办法吗?

最佳回答

i 此前已经这样做。 该公司做的是罚款。 因此,除非你研究我的法典,世界上显然有两人认为这有用。

它不是备选案文至上get_query_set——它提供additional 获取(过滤)事例的途径。 您可以同时进行(有理)。

你们期待的是哪些问题?

PS这一办法也用于Pro Django, 第274页,此后,通过<代码>第_recent()等方法扩大了管理员。

问题回答

利用模范管理人员总结复杂的办公室管理查询,是南盟建议的一个问题。 您可以增加这些方法的参数,并节省许多法典:

class ToDoManager(models.Manager):
      def scheduled(self, start_date, end_date):
      """
      Returns tasks to be done within two dates.
      """
      return self.filter(...)

之后,你刚刚做到:

todo_tasks = ImpStuff.objects.scheduled(datetime.now(), datetime.datetime.now() + datetime.timedelta(3))

管理者被大量公开来源Django,可在Github查阅。





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