Django REST框架ModelSerializer db_table而不是外键名称

Question

运行Serializers.py提供了我想要的输出。问题出在ActivitiesSerializer类中，我必须覆盖化验字段，以便将其重命名为“ assays”以匹配db_table的名称。我不能在每种情况下都手动执行此操作。有什么方法可以覆盖默认的ModelSerializer来使用db_table名称而不是Foreignkey字段名称？

model.py：

class Activities(models.Model):
    activity_id = models.BigIntegerField(primary_key=True)
    assay = models.ForeignKey('Assays', models.DO_NOTHING)

    class Meta:
        managed = False
        db_table = 'activities'

class Assays(models.Model):
    assay_id = models.BigIntegerField(primary_key=True)
    doc = models.ForeignKey('Docs', models.DO_NOTHING)

    class Meta:
        managed = False
        db_table = 'assays'

Serializers.py

class AssaysSerializer(serializers.ModelSerializer):
    class Meta:
        model = Assays
        fields = '__all__'
        depth = 0

class ActivitiesSerializer(serializers.ModelSerializer):
    assays = AssaysSerializer(source='assay')
    class Meta:
        model = Activities
        fields = '__all__'
        depth = 0

ActivitiesObjectA = ActivitiesSerializer(Activities.objects.get(activity_id=17126237))
ActivitiesObjectA_JSON = JSONRenderer().render(ActivitiesObjectA.data)
print(ActivitiesObjectA_JSON)