Django中自定义管理类

class AnimalManager(models.Manager):
    def get_queryset(self):
        # 只查询没有进行物理删除的数据
        return super().get_queryset().filter(is_delete=False)


    # 创建对象
    def create_animal(self,a_name='mouse'):
        a = self.model()
        a.a_name = a_name
        return a

class Animal(models.Model):
    a_name = models.CharField(max_length=16)
    is_delete = models.BooleanField(default=False)
    # 显性查询，自定义管理器
    # a = models.Manager()
    # 调用自定义管理类
    a = AnimalManager()

def get_animal(request):
    animals = Animal.a.all()
    for animal in animals:
        print(animal.a_name)
    return HttpResponse('查询成功！')

def insert_animal(requesst):
    animal = Animal.a.create_animal('mouse')
    animal.save()
    return HttpResponse('插入成功！')