高级用法之source与 SerializerMethodField

高级用法之source

1 修改返回到前端的字段名
# source=title 字段名就不能再叫title
name = serializers.CharField(max_length=32,min_length=2,source='title')
2 如果表模型中有方法
# 执行表模型中的test方法，并且把返回值赋值给xxx
xxx=serializers.CharField(source='test')
3 sourc支持跨表操作
addr=serializers.CharField(source='publish.addr')

 

 

 

高级用法之SerializerMethodField

class BookSerializer(serializers.Serializer):
    id = serializers.IntegerField(required=False)
    name = serializers.CharField(max_length=32,min_length=2,source='title')
    price = serializers.DecimalField(max_digits=5, decimal_places=2)
    publish = serializers.SerializerMethodField()
    def get_publish(self,obj):
        dic={'name':obj.publish.name,'addr':obj.publish.addr}
        return dic


class BookModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Book
        fields = '__all__'
    publish = serializers.SerializerMethodField()
    def get_publish(self,obj):
        dic={'name':obj.publish.name,'addr':obj.publish.addr}
        return dic
    
    
    
## 第三中方案，使用序列化类的嵌套*****
class PublishSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Publish
        # fields = '__all__'
        fields = ['name','addr']


class BookModelSerializer(serializers.ModelSerializer):
    publish = PublishSerializer()

    class Meta:
        model = models.Book
        fields = '__all__'