Django REST framework之版本，解释器，序列化

1 版本

通过？后面传版本号有两种方法：

方法一

from django.shortcuts import render

from rest_framework.views import  APIView

from rest_framework.response import Response

from  rest_framework.authentication import BasicAuthentication

from rest_framework.versioning import QueryParameterVersioning,URLPathVersioning,HostNameVersioning

from rest_framework.renderers import BrowsableAPIRenderer,JSONRenderer

# Create your views here.

class UserView(APIView):

    #版本号通过？后面传参数

    def get(self,request,*args,**kwargs):

        print('',request.version)

        version=request.query_params.get('version')

        if version=="v1":

            ret={

                "name":"Frank"

            }

        elif version=="v2":

            ret={

                "name":"Tom"

            }

        else:

            ret='错误信息'

        return  Response(ret)

方法二：

versioning_class = QueryParameterVersioning#用这个的话，可以使用request.version来获取值

    def get(self, request, *args, **kwargs):

        print('', request.version)

        if request.version == "v1":

            ret = {

                "name": "Frank5555"

            }

        elif request.version == "v2":

            ret = {

                "name": "Tom"

            }

        else:

            ret = '错误信息'

        return Response(ret)

把url放在里面：

 #版本号放在URL里面

    # versioning_class = URLPathVersioning

    #

    # def get(self, request, *args, **kwargs):

    #     print('11111', request.version)

    #     from django.urls import reverse

    #     url=reverse(viewname="u",kwargs={"version":'v1'})#django生成的URl需要拼接

    #     # url=request.versioning_scheme.reverse(viewname='u',request=request)#反向生成URl，这个URL不需要拼接。

    #     print(url)

    #     if request.version == "v1":

    #         ret = {

    #             "name": "Frank5555"

    #         }

    #     elif request.version == "v2":

    #         ret = {

    #             "name": "Tom"

    #         }

    #     else:

    #         ret = '错误信息'

    #     return Response(ret)

子域名版本：

  versioning_class=HostNameVersioning

     def get(self, request, *args, **kwargs):

        # print('11111', request.version)

        # print('222',request.versioning_scheme)

        if request.version == "v1":

            ret = {

                "name": "Frank5555"

            }

        elif request.version == "v2":

            ret = {

                "name": "Tom"

            }

        else:

            ret = '错误信息'

        return Response(ret)

上面的设置可以看成时在视图里面设置的。

也可以在全局设置：(只能使用一种)

REST_FRAMEWORK = {

                'VERSION_PARAM':'version',

                'DEFAULT_VERSION':'v1',

                'ALLOWED_VERSIONS':['v1','v2'],

                #'DEFAULT_VERSIONING_CLASS':"rest_framework.versioning.HostNameVersioning"

                'DEFAULT_VERSIONING_CLASS':"rest_framework.versioning.URLPathVersioning"

            }

2 解释器

文字解释：

请求的数据进行解析：请求体进行解析。表示服务端可以解析的数据格式的种类。

            Content-Type: application/url-encoding.....

            request.body

            request.POST

            Content-Type: application/json.....

            request.body

            request.POST#里面没有数据

        客户端：

            Content-Type: application/json

            '{"name":"alex","age":123}'

        服务端接收：

            读取客户端发送的Content-Type的值 application/json

            parser_classes = [JSONParser,]

            如果客户端的Content-Type的值和 application/json 匹配：JSONParser处理数据

            如果客户端的Content-Type的值和 application/x-www-form-urlencoded 匹配：FormParser处理数据

        配置：

            单视图：

            class UsersView(APIView):

                parser_classes = [JSONParser,]

            全局配置：

                REST_FRAMEWORK = {

                    'VERSION_PARAM':'version',

                    'DEFAULT_VERSION':'v1',

                    'ALLOWED_VERSIONS':['v1','v2'],

                    # 'DEFAULT_VERSIONING_CLASS':"rest_framework.versioning.HostNameVersioning"

                    'DEFAULT_VERSIONING_CLASS':"rest_framework.versioning.URLPathVersioning",

                    'DEFAULT_PARSER_CLASSES':[

                        'rest_framework.parsers.JSONParser',

                        'rest_framework.parsers.FormParser',

                    ]

                }

from django.shortcuts import render

# Create your views here.

from django.shortcuts import render

from rest_framework.views import APIView

from rest_framework.response import Response

from rest_framework.authentication import  BasicAuthentication

from rest_framework.versioning import QueryParameterVersioning,URLPathVersioning,HostNameVersioning

from rest_framework.parsers import JSONParser,FormParser

class UserView(APIView):

    def get(self,request,*args,**kwargs):

        print('生活如此美好')

        return  Response(">>>>>fuck")

    def post(self,request,*args,**kwargs):

        #parser_classes = [JSONParser, ]这是局部的

        #application/json

        print('json',request._request.body)#里面放的时Json数据是b"xxxxx"

        print('json',request._request.POST)#里面没有数据

        print('json',request.data)

        #www-form-url-encode

        print('body',request._request.body)#字节的形式b'k1=v1&k2=v2'

        print('post',request._request.POST)# <QueryDict: {'k1': ['v1'], 'k2': ['v2']}>

        print('encode',request.data)

        print(request.POST)

        return  Response('.......')

3.序列化

rest framework序列化+From验证

序列化：

对象=》字符串序列化

字符串=》对象反序列化

目的：

解决QuerySet序列化问题

用到了路由分发：

"""demo URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:

    https://docs.djangoproject.com/en/1.11/topics/http/urls/

Examples:

Function views

    1. Add an import:  from my_app import views

    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')

Class-based views

    1. Add an import:  from other_app.views import Home

    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')

Including another URLconf

    1. Import the include() function: from django.conf.urls import url, include

    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))

"""

from django.conf.urls import url,include

from django.contrib import admin

urlpatterns = [

    url(r'^admin/', admin.site.urls),

    # url(r'^app01/(?P<version>[v1|v2]+)/', include('app01.urls')),

    url(r'^app01/', include('app01.urls')),

    url(r'^app02/', include('app02.urls')),

    url(r'^app03/', include('app03.urls')),

    url(r'^app05/', include('app05.urls')),

]

每个app里面的路由都是大同小异：

from django.conf.urls import url

from . import  views

urlpatterns = [

    url(r'^user/', views.UserView.as_view(),name='u'),

]

a.基本操作：

class UsersSerializer(serializers.Serializer):

            name = serializers.CharField()

            pwd = serializers.CharField()

 class UsersView(APIView):

           def get(self,request,*args,**kwargs):

                self.dispatch

                # 方式一：

                # user_list = models.UserInfo.objects.all().values('name','pwd','group__id',"group__title")

                # return Response(user_list)

                # 方式二之多对象

                # user_list = models.UserInfo.objects.all()

                # ser = UsersSerializer(instance=user_list,many=True)

                # return Response(ser.data)

                # 方式二之单对象

                user = models.UserInfo.objects.all().first()

                ser = UsersSerializer(instance=user, many=False)

                return Response(ser.data)

b.跨表操作：

class UsersSerializer(serializers.Serializer):

                      name = serializers.CharField()

                      pwd = serializers.CharField()

                      group_id = serializers.CharField()

                      xxxx = serializers.CharField(source="group.title")

                      x1 = serializers.CharField(source="group.mu.name")

                class UsersView(APIView):

                    def get(self,request,*args,**kwargs):

                        self.dispatch

                        # 方式一：

                        # user_list = models.UserInfo.objects.all().values('name','pwd','group__id',"group__title")

                        # return Response(user_list)

                        # 方式二之多对象

                        user_list = models.UserInfo.objects.all()

                        ser = UsersSerializer(instance=user_list,many=True)

                        return Response(ser.data)

c.复杂多对多操作(主要是多对多的显示)

方法一：

from django.shortcuts import render
from rest_framework.views import APIView

from  rest_framework.response import Response
from rest_framework.authentication import BasicAuthentication
from rest_framework.versioning import QueryParameterVersioning
from  rest_framework import serializers
from rest_framework.request import Request
from . import models


class MyCharField(serializers.CharField):

    def to_representation(self, value):

        print(value)

        data_list=[]

        for row in value:

            data_list.append(row.name)

        return  data_list

class UsersSerializer(serializers.Serializer):

    name = serializers.CharField()

    pwd = serializers.CharField()

    # group_id=serializers.CharField()

    # xxxx=serializers.CharField(source="group.title")

    # x1=serializers.CharField(source="group.mu.name")

    x2=MyCharField(source="roles.all")#多对多建立方法就是更改显示的方式

class UserView(APIView):

    def get(self, request, *args, **kwargs):

        user_list = models.UserInfo.objects.all().first()

        ser = UsersSerializer(instance=user_list, many=False)

        return Response(ser.data)

方法二：

class MyCharField(serializers.CharField):

    def to_representation(self, value):

        return  {'id':value.pk,'name':value.name}

class UsersSerializer(serializers.Serializer):

    name = serializers.CharField()

    pwd = serializers.CharField()

    # group_id=serializers.CharField()

    # xxxx=serializers.CharField(source="group.title")

    # x1=serializers.CharField(source="group.mu.name")

    # x2=MyCharField(source="roles.all")#多对多建立方法就是更改显示的方式

    x2=serializers.ListField(child=MyCharField(),source="roles.all")

方法三：(推荐使用这个方法因为可以自己修改和加约束条件)

class UsersSerializer(serializers.Serializer):

    name = serializers.CharField()

    pwd = serializers.CharField()

    # group_id=serializers.CharField()

    # xxxx=serializers.CharField(source="group.title")

    # x1=serializers.CharField(source="group.mu.name")

    # x2=MyCharField(source="roles.all")#多对多建立方法就是更改显示的方式

    # x2=serializers.ListField(child=MyCharField(),source="roles.all")

    x2=serializers.SerializerMethodField()

    def get_x2(self,obj):

        obj.roles.all()

        role_list=obj.roles.filter(id__gt=1)

        data_list=[]

        for row in role_list:

            data_list.append({'pk':row.pk,'name':row.name})

        return  data_list

以上三种都是使用相同的视图：

d.生成Modell时：

class UsersSerializer(serializers.ModelSerializer):

    class Meta:

        model=models.UserInfo

        fields="__all__"

class UserView(APIView):

    def get(self, request, *args, **kwargs):

        user_list = models.UserInfo.objects.all().all()

        ser = UsersSerializer(instance=user_list, many=True)

        return Response(ser.data)

e.生成Ulr时：

class UsersSerializer(serializers.ModelSerializer):

    group=serializers.HyperlinkedIdentityField(view_name='detail')

    class Meta:

        model=models.UserInfo

        # fields="__all__"

        fields=['name','pwd','group']

        depth=1

class UserView(APIView):

    def get(self, request, *args, **kwargs):

        user_list = models.UserInfo.objects.all()

        ser = UsersSerializer(instance=user_list, many=True,context={'request':request})

        return Response(ser.data)

url为

from django.conf.urls import url

from . import  views

urlpatterns = [

    url(r'^user/', views.UserView.as_view(),name='u'),

    url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='detail'),

    url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='detail'),

    url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='detail'),

]

f生成全局URL时：

class UsersSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:

        model=models.UserInfo

        fields="__all__"

        # fields=['name','pwd','group']

        # depth=1

class UserView(APIView):

    def get(self, request, *args, **kwargs):

        user_list = models.UserInfo.objects.all()

        ser = UsersSerializer(instance=user_list, many=True,context={'request':request})

        return Response(ser.data)

它的url：

from django.conf.urls import url

from . import  views

urlpatterns = [

    url(r'^user/', views.UserView.as_view(),name='u'),

    # url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='detail'),

    # url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='detail'),

    # url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='detail'),

    url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='userinfo-detail'),

    url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='group-detail'),

    url(r'^xxxx/(?P<pk>\d+)', views.UserView.as_view(),name='role-detail'),

]

数据验证有两种方式：

class PasswordValidator(object):

    def __init__(self,base):

        self.base=base

    def __call__(self, value):

        if value !=self.base:

            message='用户输入的值必须是%s'%self.base

            raise  serializers.ValidationError(message)

    def set_context(self,serializer_field):

        pass

class UserSeializer(serializers.Serializer):

    name=serializers.CharField(min_length=6)

    pwd=serializers.CharField(error_messages={'required':'密码不能为空'},validators=[PasswordValidator('')])

class UserView(APIView):

    def get(self,request,*args,**kwargs):

        user_list=models.UserInfo.objects.all()

        ser=UserSeializer(instance=user_list,many=True,context={'request':request})

    def post(self,request,*args,**kwargs):

        ser=UserSeializer(data=request.data)

        if ser.is_valid():

            print(ser.validated_data)

        else:

            print(ser.errors)

        return  Response('.....')

class PasswordValidator(object):

    def __init__(self,base):

        self.base=base

    def __call__(self, value):

        if value !=self.base:

            message='用户输入的值必须是%s'%self.base

            raise  serializers.ValidationError(message)

    def set_context(self,serializer_field):

        pass

class UserSeializer(serializers.ModelSerializer):

    class Meta:

        model=models.UserInfo

        fields="__all__"

        extra_kwargs={

            'name':{'min_length':6},

            'pwd':{'validators':[PasswordValidator(666),]}

        }

class UserView(APIView):

    def get(self,request,*args,**kwargs):

        user_list=models.UserInfo.objects.all()

        ser=UserSeializer(instance=user_list,many=True,context={'request':request})

    def post(self,request,*args,**kwargs):

        ser=UserSeializer(data=request.data)

        if ser.is_valid():

            print(ser.validated_data)

        else:

            print(ser.errors)

        return  Response('.....')

Django REST framework之版本，解释器，序列化的更多相关文章

Django REST framework 中文教程1:序列化
建立环境在我们做任何事情之前,我们将使用virtualenv创建一个新的虚拟环境.这将确保我们的包配置与我们正在开展的任何其他项目保持良好的隔离. virtualenv envsource env/ ...
Django rest framework（6）----序列化
目录 Django rest framework(1)----认证 Django rest framework(2)----权限 Django rest framework(3)----节流 Djan ...
Django Rest framework 之版本
RESTful 规范 django rest framework 之认证(一) django rest framework 之权限(二) django rest framework 之节流(三) ...
day71:drf:API接口&Restful API规范&Django Rest Framework&drf中的序列化和反序列化功能
目录 1.web应用模式 2.API接口 3.Restful API规范 4.序列化 5.Django Rest Framework 1.drf的简单介绍 2.drf的特点 3.如何安装drf 4.d ...
Django rest framework 之版本
一.通过 QueryParameterVersioning 获取版本通过 QueryParameterVersioning 从 get 请求中获取版本信息: 1.新建 app,名为 api,Proj ...
Django rest framework（6）----序列化（2）
为什么要序列化 django 查询数据库返回的类型是 queryset 类型而我们和前端通信使用的大多数是json类型,这个时候我们需要把 queryset的数据类型转换成python的数据类型然 ...
Django rest framework源码分析（4）----版本
版本新建一个工程Myproject和一个app名为api (1)api/models.py from django.db import models class UserInfo(models.Mo ...
Django Rest framework 之序列化
RESTful 规范 django rest framework 之认证(一) django rest framework 之权限(二) django rest framework 之节流(三) ...
Django rest framework（4）----版本
目录 Django组件库之(一) APIView源码 Django restframework (1) ----认证 Django rest framework(2)----权限 Django res ...

随机推荐

精读JavaScript模式(三)，new一个构造函数居然发生了什么？
一.前言上个月底,爸爸因为事故突然离世,说心里话,现在看到'去世','爸爸'这样的字眼,眼泪都会忍不住在眼眶打转,还是需要时间治愈.最近也只是零碎的看了下东西,始终沉不下心去读书,直到今天还是决定捡 ...
AD预测论文研读系列1
A Deep Learning Model to Predict a Diagnosis of Alzheimer Disease by Using 18F-FDG PET of the Brain ...
[SPOJ22343] Norma
Description 现在有一个长度为\(N(N\leq 500000)\)的序列,定义区间\([l,r]\)的价值为\([l,r]\)的最小值乘上\([l,r]\)的最大值乘上\([l,r]\)的 ...
NLog 配置
之前我介绍过如何使用log4net来记录日志,但最近喜欢上了另一个简单好用的日志框架NLog. 关于NLog和log4net的比较这里就不多讨论了,感兴趣的朋友可以参看.NET日志工具介绍和log4n ...
VS2012使用验证控件出现[ASP.NET]WebForms UnobtrusiveValidationMode 需要 'jquery' 的 ScriptResourceMapping。請加入 ScriptResourceMapping 命名的 jquery (區分大小寫)。的解决办法。
方法一:在webconfig中找到 <appSettings><add key="aspnet:UseTaskFriendlySynchronizationContext& ...
【Core】在mvc使用EF
引用DLL: 继续上一篇的内容我们来添加EF实体: 首先:工具> NuGet程序包管理器>程序包管理器控制台: Install-Package Microsoft.EntityFramew ...
【Java并发编程】19、DelayQueue源码分析
DelayQueue,带有延迟元素的线程安全队列,当非阻塞从队列中获取元素时,返回最早达到延迟时间的元素,或空(没有元素达到延迟时间).DelayQueue的泛型参数需要实现Delayed接口,Del ...
复盘价值1000万的腾讯云硬盘固件"BUG"
摘要: 除了吃瓜,还是得吸取教训啊同学们! 这次,我从纯技术角度分析腾讯云与前沿数控的磁盘数据丢失事件,不站队. 硬盘门这里说的硬盘门不是10年前陈老师的那一次,而聊的是最近"腾讯云&qu ...
Archlinux/Manjaro使用笔记-使用makepkg安装软件报错：未找到strip分割所需的二进制文件的解决方法
我的邮箱地址:zytrenren@163.com欢迎大家交流学习纠错! 使用archlinux或manjaro安装aurman时遇到如下报错错误:未找到strip分割所需的二进制文件原因:未安装g ...
ImageButton和ImageView设置点击透明区域不响应
思路 ImageView和ImageButton都可以设置background和设置src,两者的区别自行度娘.由于两者的不同,获取它们的图片资源的方法也不同.倘若设置的是background,那么需 ...

Django REST framework之版本，解释器，序列化

Django REST framework之版本，解释器，序列化的更多相关文章

随机推荐

热门专题