Django中的通用一对一关系

我最近遇到了这个问题。您所做的一切都很好，但是您可以通过创建一个可以透明地逆转关系的mixin将其概括起来：

class Event(models.Model):    content_type      = models.ForeignKey(ContentType)    object_id         = models.PositiveIntegerField()    content_object    = generic.GenericForeignKey('content_type', 'object_id')    class meta:        unique_together   = ('content_type', 'object_id')class EventMixin(object):     @property     def get_event(self):         ctype = ContentType.objects.get_for_model(self.__class__)         try:  event = Event.objects.get(content_type__pk = ctype.id, object_id=self.id)         except: return None          return eventclass Action1(EventMixin, models.Model):    # Don't need to mess up the models fields (make sure the mixing it placed before models.Model)    ...

和

action = Action1.object.get(id=1)event = action.get_event

您可能也想向反向关系添加缓存