在同一个视图类当中使用多个序列化器 get_serializer_class 的使用

# 1.项目分布
drf_0
--app01
----__init__.py
----view.py
----models.py
----serlizer.py
----urls.py
--drf_0
----__init__.py
----urls.py
----setting.py
--media
----icon

# 2.项目描述：1. 使用diango--auth表，新增自定义表名-- telephone icon 
　　　　　　　 2. setting中进行相关的配置 
　　　　　　　 3. 在同一个视图类使用多个序列化器 重写方法--get_serializer_class
　　　　　　　 4. 注册--重写序列化--create view--create  单查 修改接口
　　　　　　　　
# models.py 
from django.db import models
from django.contrib.auth.models import AbstractUser

class User(AbstractUser):
    telephone = models.CharField(max_length=11)
    icon = models.ImageField(upload_to='icon', default='icon/default.png')

# setting.py
# 头像文件夹配置
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')  # 现在的BASEDIR是项目根路径
# auth表配置
AUTH_USER_MODEL = 'app01.user'  # app.小写表名

# app01--urls.py
from django.urls import path, include
from rest_framework.routers import SimpleRouter

from app01 import views

router = SimpleRouter()
router.register('register', views.RegisterView, 'register')

urlpatterns = [
    path('', include(router.urls)),
]
# def_0--urls.py
from django.contrib import admin
from django.urls import path, include, re_path
from django.views.static import serve
from django.conf import settings

urlpatterns = [
    path('admin/', admin.site.urls),
    re_path('media/(?P<path>.*)', serve, {'document_root': settings.MEDIA_ROOT}),

    path('app01/', include('app01.urls'))
]

view.py
from django.shortcuts import render
from . import models
from rest_framework.viewsets import GenericViewSet
from rest_framework.mixins import CreateModelMixin, RetrieveModelMixin, UpdateModelMixin
from rest_framework.response import Response
from . import serializer

dic = {
    'username': None,
    'msg': '',
    'telephone': None

}


class RegisterView(GenericViewSet, CreateModelMixin, RetrieveModelMixin, UpdateModelMixin):
    queryset = models.User.objects.all()
    serializer_class = serializer.RegisterSerializer

    def get_serializer_class(self):
        if self.action == 'create':
            return serializer.RegisterSerializer
        elif self.action == 'retrieve':
            return serializer.RetrieveSerializer
        elif self.action == 'update':
            return serializer.UpdateSerializer

    def create(self, request, *args, **kwargs):
        response = super(RegisterView, self).create(request, *args, **kwargs)
        username = response.data.get('username')
        telephone = response.data.get('telephone')
        dic['username'] = username
        dic['telephone'] = telephone
        dic['msg'] = '成功'
        return Response(data=dic)
serializer.py
from rest_framework import serializers
from rest_framework.exceptions import ValidationError

from . import models
import re

# 注册
class RegisterSerializer(serializers.ModelSerializer):
    re_password = serializers.CharField(write_only=True, max_length=11, min_length=6)

    class Meta:
        model = models.User
        fields = ['username', 'password', 're_password', 'telephone', 'icon']
        extra_kwargs = {
            'username': {'max_length': 32},
            'password': {'max_length': 32, 'write_only': True},
            'icon': {'read_only': True}
        }

    def validate_telephone(self, data):
        if re.match('^1[3-9][0-9]{9}', data):
            return data
        raise ValidationError('手机号不合法')

    def validate(self, attrs):
        if attrs.get('password') == attrs.get('re_password'):
            attrs.pop('re_password')
            return attrs
        raise ValidationError('两次输入密码不一致')

　　 # 不重写的话 密码会以明文进入数据库 登录的时候出现登不上的问题
    def create(self, validated_data):
        user = models.User.objects.create_user(**validated_data)
        return user

# 单查
class RetrieveSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.User
        fields = ['username', 'icon']

# 更新
class UpdateSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.User
        fields = ['icon']