如何在数据库中获取contentType forefer键的名称

Question

我在下面有这样的字段，

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

class MessageLog(BaseModel):
    receiver_type = m.ForeignKey(
        ContentType,
        related_name="receiver_%(class)s_set", on_delete=m.CASCADE,null=True)
    receiver_id = m.PositiveBigIntegerField(null=True)
    receiver = GenericForeignKey('receiver_type', 'receiver_id')

我可以这样访问成员，并且都返回数字。

m = MessageLog.objects.get(id=1)

print(m.receiver_id) //  2
print(m.receiver_type) // 12 

但是，print（m.receiver）

object has no attribute 'receiver'

我想获取receiver_type名称的名称。

我该怎么做？