Django REST framework foreignkey 序列化

Django REST framework is a powerful and flexible toolkit for building Web APIs.

Some reasons you might want to use REST framework:

The Web browsable API is a huge usability win for your developers.
Authentication policies including packages for OAuth1a and OAuth2.
Serialization that supports both ORM and non-ORM data sources.
Customizable all the way down – just use regular function-based views if you don’t need the more powerful features.
Extensive documentation, and great community support.
Used and trusted by internationally recognised companies including Mozilla, Red Hat, Heroku, and Eventbrite.

之前虽然也用了Django REST framework 但是序列化函数基本都是自己写的，并没有用框架带的序列化函数。这次不想在搞的那么麻烦，于是使用Django REST framework带的序列化函数。

但是在序列化foreignkey的时候却发现只有id，其余的数据没有。

model定义：

class PlayerGoodsItem(models.Model):
    create = models.DateTimeField(default=timezone.now, help_text='创建时间')
    update = models.DateTimeField(auto_now=True, help_text='修改时间')
    goods_item = models.ForeignKey(GoodsItem, related_name='goodsitem_playergoodsitem', help_text='商品信息',
                                   on_delete=models.CASCADE)

序列化代码：

class PlayerGoodsItemSerializer(serializers.ModelSerializer):
    class Meta:
        model = PlayerGoodsItem
        fields = "__all__"

返回数据：

{
	"id": 7,
	"create": "2019-12-03T14:14:34.934473+08:00",
	"update": "2019-12-03T14:14:35.052401+08:00",
	"goods_item": 1
}

官方文档里只有反向序列化代码，没有说如何进行foreignkey序列化。上网搜了一下，发现了这么两个帖子：

https://blog.csdn.net/WanYu_Lss/article/details/82120259

https://www.cnblogs.com/pgxpython/articles/10144398.html

看了下实现方法，觉得貌似不应该这么复杂，于是就尝试将foreignkey直接放进去序列化，事实证明是可以的，修改后的序列化函数

class GoodsItemSerializer(serializers.ModelSerializer):
    class Meta:
        model = GoodsItem
        fields = "__all__"
 
 
class PlayerGoodsItemSerializer(serializers.ModelSerializer):
    goods_item = GoodsItemSerializer()
    class Meta:
        model = PlayerGoodsItem
        fields = "__all__"

返回数据：

{
	"id": 7,
	"goods_item": {
		"id": 1,
		"create": "2019-12-03T14:02:12+08:00",
		"update": "2019-12-03T14:04:21.868583+08:00",
		"sub_goods_type": 1,
	},
	"create": "2019-12-03T14:14:34.934473+08:00",
	"update": "2019-12-03T14:14:35.052401+08:00",
}

原创文章，转载请注明： 转载自 obaby@mars

本文标题: 《Django REST framework foreignkey 序列化》

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