urlpatterns = [  re_path('(?P<version>[v1|v2]+)/page1/', Pager1View.as_view(),)  #分頁1]

# api/utils/serializsers/pager.pyfrom rest_framework import serializersfrom api import modelsclass PagerSerialiser(serializers.ModelSerializer):  class Meta:    model = models.Role    fields = "__all__"

from api.utils.serializsers.pager import PagerSerialiserfrom rest_framework.response import Responsefrom rest_framework.pagination import PageNumberPaginationclass Pager1View(APIView):  def get(self,request,*args,**kwargs):    #獲取所有數據    roles = models.Role.objects.all()    #創建分頁對象    pg = PageNumberPagination()    #獲取分頁的數據    page_roles = pg.paginate_queryset(queryset=roles,request=request,view=self)    #對數據進行序列化    ser = PagerSerialiser(instance=page_roles,many=True)    return Response(ser.data)

REST_FRAMEWORK = {  #分頁  "PAGE_SIZE":2  #每頁顯示多少個}

#自定義分頁類class MyPageNumberPagination(PageNumberPagination):  #每頁顯示多少個  page_size = 3  #默認每頁顯示3個，可以通過傳入pager1/?page=2&size=4,改變默認每頁顯示的個數  page_size_query_param = "size"  #最大頁數不超過10  max_page_size = 10  #獲取頁碼數的  page_query_param = "page"class Pager1View(APIView):  def get(self,request,*args,**kwargs):    #獲取所有數據    roles = models.Role.objects.all()    #創建分頁對象，這里是自定義的MyPageNumberPagination    pg = MyPageNumberPagination()    #獲取分頁的數據    page_roles = pg.paginate_queryset(queryset=roles,request=request,view=self)    #對數據進行序列化    ser = PagerSerialiser(instance=page_roles,many=True)    return Response(ser.data)

#自定義分頁類2class MyLimitOffsetPagination(LimitOffsetPagination):  #默認顯示的個數  default_limit = 2  #當前的位置  offset_query_param = "offset"  #通過limit改變默認顯示的個數  limit_query_param = "limit"  #一頁最多顯示的個數  max_limit = 10class Pager1View(APIView):  def get(self,request,*args,**kwargs):    #獲取所有數據    roles = models.Role.objects.all()    #創建分頁對象    pg = MyLimitOffsetPagination()    #獲取分頁的數據    page_roles = pg.paginate_queryset(queryset=roles,request=request,view=self)    #對數據進行序列化    ser = PagerSerialiser(instance=page_roles,many=True)    return Response(ser.data)

#自定義分頁類3 (加密分頁)class MyCursorPagination(CursorPagination):  cursor_query_param = "cursor"  page_size = 2   #每頁顯示2個數據  ordering = 'id'  #排序  page_size_query_param = None  max_page_size = Noneclass Pager1View(APIView):  def get(self,request,*args,**kwargs):    #獲取所有數據    roles = models.Role.objects.all()    #創建分頁對象    pg = MyCursorPagination()    #獲取分頁的數據    page_roles = pg.paginate_queryset(queryset=roles,request=request,view=self)    #對數據進行序列化    ser = PagerSerialiser(instance=page_roles,many=True)    # return Response(ser.data)    return pg.get_paginated_response(ser.data)

# MyProject2/urls.pyfrom django.contrib import adminfrom django.urls import path,includeurlpatterns = [  #path('admin/', admin.site.urls),  path('api/',include('api.urls') ),]

# api/urls.pyfrom django.urls import path,re_pathfrom .views import UserView,PaserView,RolesView,UserInfoView,GroupView,UserGroupViewfrom .views import Pager1Viewurlpatterns = [  re_path('(?P<version>[v1|v2]+)/users/', UserView.as_view(),name = 'api_user'), #版本  path('paser/', PaserView.as_view(),),  #解析  re_path('(?P<version>[v1|v2]+)/roles/', RolesView.as_view()),   #序列化  re_path('(?P<version>[v1|v2]+)/info/', UserInfoView.as_view()),  #序列化  re_path('(?P<version>[v1|v2]+)/group/(?P<pk>/d+)/', GroupView.as_view(),name = 'gp'),  #序列化生成url  re_path('(?P<version>[v1|v2]+)/usergroup/', UserGroupView.as_view(),),  #序列化做驗證  re_path('(?P<version>[v1|v2]+)/pager1/', Pager1View.as_view(),)  #分頁1]

# api/models.pyfrom django.db import modelsclass UserInfo(models.Model):  USER_TYPE = (    (1,'普通用戶'),    (2,'VIP'),    (3,'SVIP')  )  user_type = models.IntegerField(choices=USER_TYPE)  username = models.CharField(max_length=32,unique=True)  password = models.CharField(max_length=64)  group = models.ForeignKey('UserGroup',on_delete=models.CASCADE)  roles = models.ManyToManyField('Role')class UserToken(models.Model):  user = models.OneToOneField('UserInfo',on_delete=models.CASCADE)  token = models.CharField(max_length=64)class UserGroup(models.Model):  style="margin: 0px; padding: 0px; outline: none; line-height: 25.2px; font-size: 14px; width: 660px; overflow: hidden; clear: both; font-family: tahoma, arial, "Microsoft YaHei";">	
# api/views.pyimport jsonfrom django.shortcuts import render,HttpResponsefrom rest_framework.views import APIViewfrom rest_framework.request import Requestfrom rest_framework.versioning import URLPathVersioningfrom . import models##########################################版本和解析器#####################################################class UserView(APIView):  def get(self,request,*args,**kwargs):    #獲取版本    print(request.version)    #獲取處理版本的對象    print(request.versioning_scheme)    #獲取瀏覽器訪問的url，reverse反向解析    #需要兩個參數：viewname就是url中的別名，request=request是url中要傳入的參數    #(?P<version>[v1|v2]+)/users/，這里本來需要傳version的參數，但是version包含在request里面，所有只需要request=request就可以    url_path = request.versioning_scheme.reverse(viewname='api_user',request=request)    print(url_path)    self.dispatch    return HttpResponse('用戶列表')# from rest_framework.parsers import JSONParser,FormParserclass PaserView(APIView):  '''解析'''  # parser_classes = [JSONParser,FormParser,]  #JSONParser：表示只能解析content-type:application/json的頭  #FormParser:表示只能解析content-type:application/x-www-form-urlencoded的頭  def post(self,request,*args,**kwargs):    #獲取解析后的結果    print(request.data)    return HttpResponse('paser')###########################################序列化###########################################################from rest_framework import serializers#要先寫一個序列化的類class RolesSerializer(serializers.Serializer):  #Role表里面的字段id和title序列化  id = serializers.IntegerField()  def get(self,request,*args,**kwargs):    # 方式一：對于[obj,obj,obj]    # （Queryset）    # roles = models.Role.objects.all()    # 序列化，兩個參數，instance:Queryset 如果有多個值，就需要加 mangy=True    # ser = RolesSerializer(instance=roles,many=True)    # 轉成json格式，ensure_ascii=False表示顯示中文，默認為True    # ret = json.dumps(ser.data,ensure_ascii=False)    # 方式二：    role = models.Role.objects.all().first()    ser = RolesSerializer(instance=role, many=False)    ret = json.dumps(ser.data, ensure_ascii=False)    return HttpResponse(ret)# class UserInfoSerializer(serializers.Serializer):#   '''序列化用戶的信息'''#   #user_type是choices（1,2,3），顯示全稱的方法用source#   type = serializers.CharField(source="get_user_type_display")#   username = serializers.CharField()#   password = serializers.CharField()#   #group.title：組的名字#   group = serializers.CharField(source="group.title")#   #SerializerMethodField(),表示自定義顯示#   #然后寫一個自定義的方法#   rls = serializers.SerializerMethodField()##   def get_rls(self,row):#     #獲取用戶所有的角色#     role_obj_list = row.roles.all()#     ret = []#     #獲取角色的id和名字#     #以字典的鍵值對方式顯示#     for item in role_obj_list:#       ret.append({"id":item.id,"title":item.title})#     return ret# class UserInfoSerializer(serializers.ModelSerializer):#   type = serializers.CharField(source="get_user_type_display")#   group = serializers.CharField(source="group.title")#   rls = serializers.SerializerMethodField()##   def get_rls(self, row):#     # 獲取用戶所有的角色#     role_obj_list = row.roles.all()#     ret = []#     # 獲取角色的id和名字#     # 以字典的鍵值對方式顯示#     for item in role_obj_list:#       ret.append({"id": item.id, "title": item.title})#     return ret##   class Meta:#     model = models.UserInfo#     fields = ['id','username','password','type','group','rls']# class UserInfoSerializer(serializers.ModelSerializer):#   class Meta:#     model = models.UserInfo#     #fields = "__all__"#     fields = ['id','username','password','group','roles']#     #表示連表的深度#     depth = 1class UserInfoSerializer(serializers.ModelSerializer):  group = serializers.HyperlinkedIdentityField(view_name='gp',lookup_field='group_id',lookup_url_kwarg='pk')  class Meta:    model = models.UserInfo    #fields = "__all__"    fields = ['id','username','password','group','roles']    #表示連表的深度    depth = 0class UserInfoView(APIView):  '''用戶的信息'''  def get(self,request,*args,**kwargs):    users = models.UserInfo.objects.all()    #這里必須要傳參數context={'request':request}    ser = UserInfoSerializer(instance=users,many=True,context={'request':request})    ret = json.dumps(ser.data,ensure_ascii=False)    return HttpResponse(ret)class GroupSerializer(serializers.ModelSerializer):  class Meta:    model = models.UserGroup    fields = "__all__"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)####################################序列化之用戶請求數據驗證驗證#####################################自定義驗證規則class GroupValidation(object):  def __init__(self,base):    self.base = base  def __call__(self, value):    if not value.startswith(self.base):      message = "標題必須以%s為開頭"%self.base      raise serializers.ValidationError(message)class UserGroupSerializer(serializers.Serializer):  def post(self,request,*args, **kwargs):    ser = UserGroupSerializer(data=request.data)    if ser.is_valid():      print(ser.validated_data['title'])    else:      print(ser.errors)    return HttpResponse("用戶提交數據驗證")##################################################分頁###################################################from api.utils.serializsers.pager import PagerSerialiserfrom rest_framework.response import Responsefrom rest_framework.pagination import PageNumberPagination,LimitOffsetPagination,CursorPagination# #自定義分頁類1# class MyPageNumberPagination(PageNumberPagination):#   #每頁顯示多少個#   page_size = 3#   #默認每頁顯示3個，可以通過傳入pager1/?page=2&size=4,改變默認每頁顯示的個數#   page_size_query_param = "size"#   #最大頁數不超過10#   max_page_size = 10#   #獲取頁碼數的#   page_query_param = "page"#自定義分頁類2class MyLimitOffsetPagination(LimitOffsetPagination):  #默認顯示的個數  default_limit = 2  #當前的位置  offset_query_param = "offset"  #通過limit改變默認顯示的個數  limit_query_param = "limit"  #一頁最多顯示的個數  max_limit = 10#自定義分頁類3 (加密分頁)class MyCursorPagination(CursorPagination):  cursor_query_param = "cursor"  page_size = 2   #每頁顯示2個數據  ordering = 'id'  #排序  page_size_query_param = None  max_page_size = Noneclass Pager1View(APIView):  def get(self,request,*args,**kwargs):    #獲取所有數據    roles = models.Role.objects.all()    #創建分頁對象    pg = MyCursorPagination()    #獲取分頁的數據    page_roles = pg.paginate_queryset(queryset=roles,request=request,view=self)    #對數據進行序列化    ser = PagerSerialiser(instance=page_roles,many=True)    return Response(ser.data)    # return pg.get_paginated_response(ser.data)

# api/utils/serializsers/pager.pyfrom rest_framework import serializersfrom api import modelsclass PagerSerialiser(serializers.ModelSerializer):  class Meta:    model = models.Role    fields = "__all__"