Django的ManyToManyField到权限

我有ManyToManyField到django.contrib.auth.models.PermissionDjango的ManyToManyField到权限

的问题是，当我打开编辑我的模型记录的管理，数据库的请求数量是241

class RoleManager(models.Manager): 

    def get_query_set(self): 
     return super(RoleManager, self).get_query_set().select_related('organization') 

class Role(models.Model): 

    name = models.CharField(u'Name', max_length = 80) 
    organization = models.ForeignKey(Organization) 
    permissions = models.ManyToManyField(Permission, blank = True) 

    objects = RoleManager() 

    def __unicode__(self): 
     return u'{name} in {organization}'.format(name = self.name, organization = self.organization.name)

的235模型选择是：

SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 8 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 8 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 8 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 68 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 69 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 69 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 69 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 9 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 9 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 9 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 10 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 10 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 10 
SELECT ••• FROM "django_content_type" WHERE "django_content_type"."id" = 17

可能是我必须使用管理器来解决这个问题吗？

我看着https://github.com/django/django/blob/master/django/contrib/auth/models.py

，看见你已被使用一些PermissionManager，但不知道究竟是什么发生，如何让它在我的经理

来源

2012-12-14 Julian Popov