如何在Django中检索具有泛型关系(ContentType)的对象

from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes.fields import GenericForeignKey

from django.db import models

class MyModel(models.Model):
    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey('content_type', 'object_id')

# 获取ContentType对象
content_type = ContentType.objects.get_for_model(MyModel)

# 使用ContentType和object_id检索具有泛型关系的对象
my_objects = MyModel.objects.filter(content_type=content_type, object_id=1)

# 遍历检索到的对象
for obj in my_objects:
    # 可以通过content_object访问与泛型关系相关联的对象
    related_object = obj.content_object