[英]Renaming DRF serializer fields
I'm using DRF serializers to validate incoming data that I retrieve from a JSON API. 我正在使用DRF序列化程序来验证从JSON API检索的传入数据。 I'm trying to rename some awkwardly named fields from the response, making it easier to use the serializer.data
further on in my code. 我正在尝试从响应中重命名一些笨拙的命名字段,以便更轻松地在代码中进一步使用serializer.data
。
Data received from the API looks like this: 从API接收的数据如下所示:
{"FunnyNamedField": true, "AnotherWeirdField": false}
And handling code: 和处理代码:
resp = requests.get([...])
resp.raise_for_status()
ser = MyFunnyDataSerializer(data=resp.json())
if ser.is_valid():
do_domething_with(ser.data)
I would like the serializer to translate the incoming field names to something more consise. 我希望序列化程序将传入的字段名称转换为更简洁的名称。 ser.data
could look like: {'funny': True, 'weird': False}
. ser.data
可能类似于: {'funny': True, 'weird': False}
。
What I tried but doesn't work as I hoped: 我尝试了但未能如我所愿的:
class MyFunnyDataSerializer(serializers.Serializer):
funny = serializers.Booleanfield(source='FunnyNamedField')
Is there any way to achieve this without reverting to a SerializerMethodField
? 有什么方法可以实现而无需恢复为SerializerMethodField
?
You can override BaseSerializer to achieve this: 您可以重写BaseSerializer来实现此目的:
from rest_framework import serializers
class CustomSerializer(serializers.BaseSerializer):
def to_representation(self, instance):
return {
<datas>
}
You can do some specific modifications on instance serialization with custom methods. 您可以使用自定义方法对实例序列化进行一些特定的修改。
Another solution could be to write your own validator for one field: Field Validator Method . 另一种解决方案是为一个字段编写自己的验证器: Field Validator Method 。
So in this documentation example you could modify value before return it. 因此,在此文档示例中,您可以在返回值之前修改值。
from rest_framework import serializers
class BlogPostSerializer(serializers.Serializer):
title = serializers.CharField(max_length=100)
content = serializers.CharField()
def validate_title(self, value):
"""
Check that the blog post is about Django.
"""
if 'django' not in value.lower():
raise serializers.ValidationError("Blog post is not about Django")
if value == "something":
value = "something_else"
return value
Hope it helps. 希望能帮助到你。
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