Django序列化

这是我的model里面的表

1 class User(models.Model):
2     username = models.CharField(max_length=32,verbose_name='用户名')
3     age = models.IntegerField(verbose_name='年龄',null=True)
4     home = models.CharField(max_length=32,verbose_name='家乡')
5 
6     class Meta:
7         db_table = 'user'

普通序列化

from rest_framework import serializers   #倒入rest_framework里面的serializers


class UserSer(serializers.Serializer):
    username = serializers.CharField(max_length=32)   #把每个字段添入其中
    age = serializers.IntegerField(allow_null=True)  #年龄可以为null
    home = serializers.CharField(max_length=32)

######################################################################
查到的数据

{

        "username": "孔加贝月月",

        "age": 19,

        "home": "河南"

    },

    {

        "username": "尼大爷",

        "age": 20,

        "home": "河北"

    },

    {

        "username": "尼大娘",

        "age": 21,

        "home": "湖北"

    },

    {

        "username": "尼你妹",

        "age": 20,

        "home": "湖南"

    },

    {

        "username": "孔大爷",

        "age": 100,

        "home": "你心里"

    }

添加数据的序列化

from rest_framework import serializers

from app01.models import User
#还是刚刚那个序列化只不过是添加了一些代码
class UserSer(serializers.Serializer):
    username = serializers.CharField(max_length=32)
    age = serializers.IntegerField(allow_null=True)
    home = serializers.CharField(max_length=32)
    
    #序列化添加数据
    def create(self,validated_data):
        return User.objects.create(**validated_data)

##相对应views里面的代码

def post(self,request):
    data = request.data
    user = UserSer(data=data)
    try:
        user.is_valid()
        user.save()
        return Response('成功')
    except Exception:
        print('序列化加入未成功')
        return Response('失败')

修改的序列化

class UserSer(serializers.Serializer):
    username = serializers.CharField(max_length=32)
    age = serializers.IntegerField(allow_null=True)
    home = serializers.CharField(max_length=32)

    #序列化添加数据
    def create(self,validated_data):
        return User.objects.create(**validated_data)

　　　#这里开始是修改的序列化
    def update(self, instance, validated_data):
        instance.username = validated_data.get('username',instance.username)   #把他的每个字段都写入其中进行修改
        instance.age = validated_data.get('age',instance.age)
        instance.home = validated_data.get('home',instance.home)

        instance.save()    #提交 修改
        return instance

#修改相对应的views里的代码
def put(self,request):

    data = request.data

    user = User.objects.filter(id=data.get('id')).first()
    update_user = UserSer(user,data=data)

    try:
        update_user.is_valid()
        update_user.save()
        return Response('成功')
    except Exception as e:
        print(e)
        return Response('失败')