from django.conf.urls import url, include
from web.views.s6_serializers import TestViewurlpatterns = [url(r'test/', TestView.as_view(), name='test'),
]urls.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import serializers
from .. import modelsclass PasswordValidator(object):def __init__(self, base):self.base = basedef __call__(self, value):if value != self.base:message = 'This field must be %s.' % self.baseraise serializers.ValidationError(message)def set_context(self, serializer_field):"""This hook is called by the serializer instance,prior to the validation call being made."""# 执行验证之前调用,serializer_fields是当前字段对象passclass UserSerializer(serializers.Serializer):ut_title = serializers.CharField(source='ut.title')user = serializers.CharField(min_length=6)pwd = serializers.CharField(error_messages={'required': '密码不能为空'}, validators=[PasswordValidator('666')])class TestView(APIView):def get(self, request, *args, **kwargs):# 序列化，将数据库查询字段序列化为字典data_list = models.UserInfo.objects.all()ser = UserSerializer(instance=data_list, many=True)# 或# obj = models.UserInfo.objects.all().first()# ser = UserSerializer(instance=obj, many=False)return Response(ser.data)def post(self, request, *args, **kwargs):# 验证，对请求发来的数据进行验证ser = UserSerializer(data=request.data)if ser.is_valid():print(ser.validated_data)else:print(ser.errors)return Response('POST请求，响应内容')views.py

from rest_framework import serializersclass RolesSerializer(serializers.Serializer):id = serializers.IntegerField()    #显示的顺序和这里的顺序有关title = serializers.CharField()    #我们需要的字段class RolesView(APIView):def get(self,request,*args,**kwargs):#方式一# roles = models.Role.objects.all().values('id','title')# roles = list(roles)# ret = json.dumps(roles,ensure_ascii=False)#序列化，改成False则显示中文，不帮中文编码#方式二  对于querryset [obj,obj,obj]# roles = models.Role.objects.all()# ser = RolesSerializer(instance=roles,many=True)#有多条数据 many=True# # print(ser.data)#是一个有序的字典# ret = json.dumps(ser.data, ensure_ascii=False)role = models.Role.objects.all().first()ser = RolesSerializer(instance=role, many=False)  # 针对单个数据# print(ser.data)#是一个有序的字典ret = json.dumps(ser.data, ensure_ascii=False)return HttpResponse(ret)

class UserInfoSerializer(serializers.Serializer):    #类名和我们的orm没有硬性关系，但是最好是按照数据库的来这样能分清user_type1 = serializers.CharField(source="user_type")user_type2 = serializers.CharField(source="get_user_type_display")username = serializers.CharField()password = serializers.CharField()gp = serializers.CharField(source='group.title')    #通过.的方式去连外键# like = serializers.CharField(source='roles.all ')  多对多的时候不能用这种方式，显示不出来#--------------------------------------------#rls = serializers.SerializerMethodField()    #多对多使用def get_rls(self,row):role_obj_list = row.roles.all()    #字段名ret=[]for item in role_obj_list:ret.append({'id':item.id,'title':item.title})return retclass UserInfoSerializer(serializers.ModelSerializer):  #ModelSerializer相比上面的类更简洁user_type2 = serializers.CharField(source="get_user_type_display")    #实现自连，为什么实现rls = serializers.SerializerMethodField()class Meta:model = models.UserInfofields = ['id','username','password','user_type2','rls']def get_rls(self, row):   #自定义显示role_obj_list = row.roles.all()    #字段名ret=[]for item in role_obj_list:ret.append({'id':item.id,'title':item.title})return ret

urlpatterns = [re_path(r'^(?P<version>[v1|v2]+)/userinfo/$', views.UserInfoView .as_view(),),re_path(r'^(?P<version>[v1|v2]+)/group/(?P<pk>\d+)$', views.GroupView .as_view(),name='gp'),re_path(r'^(?P<version>[v1|v2]+)/group/(?P<pk>\d+)$', views.GroupView .as_view(),name='gp'),
]

class UserInfoSerializer(serializers.ModelSerializer):group = serializers.HyperlinkedIdentityField(view_name='gp',lookup_field='group_id',lookup_url_kwarg='pk')class Meta:model = models.UserInfofields = ['id','username','password','group','roles']    #fields是固定的变量，不能自定义depth = 0 #深度控制  感觉是向后.一个单位，class UserInfoView(APIView):def get(self,request,*args,**kwargs):users = models.UserInfo.objects.all()ser = UserInfoSerializer(instance=users,many=True,context={'request':request})ret = json.dumps(ser.data,ensure_ascii=False)   #防止出现乱码，在序列化的时候添加这个return HttpResponse(ret)class GroupSerializer(serializers.ModelSerializer):# group = serializers.HyperlinkedIdentityField(view_name='gp',lookup_field='group_id',lookup_url_kwarg='xxx')class Meta:model = models.UserGroupfields = '__all__'# fields = ['id','username','password','group','roles']    #fields是固定的变量，不能自定义depth = 0 #深度控制  感觉是向后.一个单位，class GroupView(APIView):def get(self,request,*args,**kwargs):pk = kwargs.get('pk')obj = models.UserGroup.objects.filter(pk=pk).first()ser = GroupSerializer(instance=obj,many=False)ret = json.dumps(ser.data,ensure_ascii=False)return HttpResponse(ret)