Django Rest框架和JSONField

问题描述

给出使用的Django模型，使用？

我已经尝试了一个自定义的 serializers.WritableField 并覆盖 to_native 和 from_native ：

 $ j $ _ code从json_field.fields导入JSONEncoder，JSONDecoder 
从rest_framework导入序列化程序
 
类JSONFieldSerializer（serializers.WritableField ）
 def to_native（self，obj）：
 return json.dumps（obj，cls = JSONEncoder）
 
 def from_native（self，data）：
 return json.loads（data，cls = JSONDecoder）
  

但是当我尝试使用 partial = True ，JSONField对象中的所有浮点变为字符串。

解决方案

如果使用Django Rest Framework> = 3.3，那么JSONField序列化程序是

Given a Django model with a JSONField, what is the correct way of serializing and deserializing it using Django Rest Framework?

I've already tried crating a custom serializers.WritableField and overriding to_native and from_native:

from json_field.fields import JSONEncoder, JSONDecoder
from rest_framework import serializers

class JSONFieldSerializer(serializers.WritableField):
    def to_native(self, obj):
    return json.dumps(obj, cls = JSONEncoder)

    def from_native(self, data):
        return json.loads(data, cls = JSONDecoder)

But when I try to updating the model using partial=True, all the floats in the JSONField objects become strings.

解决方案

If you're using Django Rest Framework >= 3.3, then the JSONField serializer is now included. This is now the correct way.

If you're using Django Rest Framework < 3.0, then see gzerone's answer.

If you're using DRF 3.0 - 3.2 AND you can't upgrade AND you don't need to serialize binary data, then follow these instructions.

First declare a field class:

from rest_framework import serializers

class JSONSerializerField(serializers.Field):
    """ Serializer for JSONField -- required to make field writable"""
    def to_internal_value(self, data):
        return data
    def to_representation(self, value):
        return value

And then add in the field into the model like

class MySerializer(serializers.ModelSerializer):
    json_data = JSONSerializerField()

And, if you do need to serialize binary data, you can always the copy official release code

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