• s11 day100路飞项目逻辑购物车一


     Luffy项目

    先看练习,如下:

    一. 添加购物车和查看

    1. url

    url(r'^shoppingcar/$', shoppingcar.ShoppingCarView.as_view({"post":"create","get":"list"})),

    2. 视图

    class ShoppingCarView(ViewSetMixin,APIView):
    def list(self,request,
    *args,**kwargs): return Response("h") def create(self, request, *args, **kwargs):
          print("request.body===>",request.body)
          print("request.post===>",request.POST)
          return Response({"code": 111})

    ① 通过postman发送 JSON格式请求(application/json)request.body

    输出结果:

    POST里面没有值

    ② request.data 

               print("request.body===>",request.body)
               print("request.data===>",request.data)
               print("request.post===>",request.POST)

    打印结果:

    request.body===> b'{	
    	"courseid":1,"policyid":2
    	
    }'
    request.data===> {'courseid': 1, 'policyid': 2}
    request.post===> <QueryDict: {}>

     以上是application/json格式发送请求    

    下面为 urlencoded格式 

             print("request.body===>",request.body)
                print("request.data===>",request.data)
                print("request.post===>",request.POST)

    发送请求:

     

    输出结果:

    request.body===> b'k1=123&k2=456'
    request.data===> <QueryDict: {'k1': ['123'], 'k2': ['456']}>
    request.post===> <QueryDict: {'k1': ['123'], 'k2': ['456']}>

    这些request 不是Django的request , 而是 restframework的request. 

    request._request为 Django的request 

               print("request.body===>",request.body)
                print("request.data===>",request.data)
                print("request.post===>",request.POST)
                print("***"*10)
                print("django's request",request._request.body)
                print("django's request",request._request.POST)

    发送urlencode数据格式

    request.body===> b'k1=123&k2=456'
    request.data===> <QueryDict: {'k1': ['123'], 'k2': ['456']}>   restframework的request
    request.post===> <QueryDict: {'k1': ['123'], 'k2': ['456']}>
    ******************************
    django's request b'k1=123&k2=456'
    django's request <QueryDict: {'k1': ['123'], 'k2': ['456']}>

    发送Application/json数据格式

    request.body===> b'{	
    	"courseid":1,"policyid":2
    	
    }'
    request.data===> {'courseid': 1, 'policyid': 2}
    request.post===> <QueryDict: {}>
    ******************************
    django's request b'{	
    	"courseid":1,"policyid":2
    	
    }'
    django's request <QueryDict: {}>

    一、路飞项目的逻辑:

     

    1.  接收用户选中的课程id和价格策略

          course_id = request.data.get("courseid")
          policy_id = request.data.get("policyid")

    2. 判断数据的合法性

      a.课程是否合法

      b.价格策略是否合法

        def create(self, request, *args, **kwargs):
    
                # 1. 接收用户选中的课程ID和价格策略ID
                course_id = request.data.get("courseid")
                policy_id = request.data.get("policyid")
    
                # 2.判断数据是否合法
                #  -课程是否合法
                # - 价格策略是否合法
    
                #2.1 课程是否合法
                course= models.Course.objects.filter(id =course_id).first()
                print(course)
                if not course:
                    return Response({"code":1001,"error":"课程不存在"})
                price_policy_query_set =course.price_policy.all()
                price_policy_dict={}
                for item in price_policy_query_set:
                    temp ={
                        "id" :item.id,
                        "price" :item.price,
                        "valid_period" :item.valid_period,
                        "valid_period_display":item.get_valid_period_display()
                    }
                    price_policy_dict[item.id]=temp
                    
                #2.2 价格策略是否合法
                if policy_id not in price_policy_dict:
                    return Response({"code":10002,"error":"价格策略你别瞎改"})
                return Response({"code": 222})

     构建数据类型 

     1. 列表 

     2. 字典 (以id作为key,)

       price_policy_query_set =course.price_policy.all()
                price_policy_list =[]
                price_policy_dict={}
    
                for item in price_policy_query_set:
    
                    temp ={
                        "id" :item.id,
                        "price" :item.price,
                        "valid_period" :item.valid_period,
                        "valid_period_display":item.get_valid_period_display()
                    }
                    price_policy_list.append(temp)
                    price_policy_dict[item.id] =temp
                    print(price_policy_list)
                    print("**"*20)
                    print(price_policy_dict)
                    print(("**"*20))
                    print(item.id ,item.price,item.valid_period,item.get_valid_period_display)

    结果:

    [{'id': 1, 'price': 100.0, 'valid_period': 7, 'valid_period_display': '1周'}]
    ****************************************
    {1: {'id': 1, 'price': 100.0, 'valid_period': 7, 'valid_period_display': '1周'}}
    ****************************************
    1 100.0 7 <bound method curry.<locals>._curried of <PricePolicy: MySQL入门(付费)(1周)100.0>>
    [{'id': 1, 'price': 100.0, 'valid_period': 7, 'valid_period_display': '1周'}, {'id': 2, 'price': 20000000.0, 'valid_period': 60, 'valid_period_display': '2个月'}]
    ****************************************
    {1: {'id': 1, 'price': 100.0, 'valid_period': 7, 'valid_period_display': '1周'}, 2: {'id': 2, 'price': 20000000.0, 'valid_period': 60, 'valid_period_display': '2个月'}}
    ****************************************
    2 20000000.0 60 <bound method curry.<locals>._curried of <PricePolicy: MySQL入门(付费)(2个月)20000000.0>>
    [10/Aug/2018 20:46:15] "POST /api/v1/shoppingcar/ HTTP/1.1" 200 12

    赋值测试:

    三、把商品和价格放入购物车:

    1. 添加到购物车 create

    #3.把商品和价格侧率信息放入购物车shoppingcar """ 购物车中要放: 课程ID 课程名称 课程图片 默认选中的价格侧率 所有价格策略 redis不支持字典套字典需要dumps出来 { 1:{ 课程ID 课程名称 课程图片 默认选中的价格侧率 所有价格策略 } 2:{ 课程ID 课程名称 课程图片 默认选中的价格侧率 所有价格策略 } } { shopping_car_用户ID_课程ID:{ id:课程ID name:课程名称 img: 课程图片 default:... price_list:所有价格策略 } } """ key ="shopping_car_%s_%s"%(1,course_id)

    # 1 可以定义为变量 USER_ID =1 CONN.hset(key,"id",course_id) CONN.hset(key,"name",course.name) CONN.hset(key,"name",course.course_img) CONN.hset(key,"deault_price",policy_id) CONN.hset(key,"price_policy_dict",json.dumps(price_policy_dict)) return Response({"已经成功加入购物车"})

    #3.把商品和价格侧率信息放入购物车shoppingcar """ 购物车中要放: 课程ID 课程名称 课程图片 默认选中的价格侧率 所有价格策略 redis不支持字典套字典需要dumps出来 { 1:{ 课程ID 课程名称 课程图片 默认选中的价格侧率 所有价格策略 } 2:{ 课程ID 课程名称 课程图片 默认选中的价格侧率 所有价格策略 } } { shopping_car_用户ID_课程ID:{ id:课程ID name:课程名称 img: 课程图片 default:... price_list:所有价格策略 } } """ key ="shopping_car_%s_%s"%(1,course_id)
    # 1 可以定义为变量 USER_ID =1 CONN.hset(key,"id",course_id) CONN.hset(key,"name",course.name) CONN.hset(key,"name",course.course_img) CONN.hset(key,"deault_price",policy_id) CONN.hset(key,"price_policy_dict",json.dumps(price_policy_dict)) return Response({"已经成功加入购物车"})

    测试redis

    postman发一个请求

    另起一个文件 

    import json
    import redis
    conn =redis.Redis(host="127.0.0.1",port="6379")
    print(conn.keys())
    
    print(conn.hget('shopping_car_1_1',"id").decode("utf-8"))
    print(conn.hget('shopping_car_1_1',"name").decode("utf-8"))
    # print(conn.hget('shopping_car_1_1',"img").decode("utf-8"))
    # print(conn.hget('shopping_car_1_1',"default_price_id").decode("utf-8"))
    print(json.loads(conn.hget('shopping_car_1_1',"price_policy_dict").decode("utf-8")))

    打印结果:

    [b'shopping_car_1_1']
    1
    11
    {'1': {'id': 1, 'price': 100.0, 'valid_period': 7, 'valid_period_display': '1周'}, '2': {'id': 2, 'price': 20000000.0, 'valid_period': 60, 'valid_period_display': '2个月'}}

     2. 查看购物车 list

     

     def list(self,request,*args,**kwargs):
            ret ={"code":10000,"data":None,"error":None}
            try:
                shopping_car_course_list =[]
    
                pattern ="shopping_car_%s"%(USER_ID,)
                user_key_list =CONN.keys(pattern)
                for key in user_key_list:
                    temp ={
                        "id":CONN.hget(key,"id").decode("utf-8"),
                        "name":CONN.hget(key,"name").decode("utf-8"),
                        "img":CONN.hget(key,"img").decode("utf-8"),
                        "default_price_id":CONN.hget(key,"default_price_id").decode("utf-8"),
                        "price_policy_dict":json.load(CONN.hget(key,"price_policy_dict").decode("utf-8"))
                        }
                    shopping_car_course_list.append(temp)
    
                ret["data"]= shopping_car_course_list
            except Exception as e:
                ret["code"]=10005
                ret["error"]="获取购物车数据失败"
            return Response(ret)

    3. 购物车删除

        url(r'^shoppingcar/$',shoppingcar.ShoppingCarView.as_view({"post":"create","get":"list","delete":"destroy"})),
        def destory(self,request,pk,*args,**kwargs):
            respone= BaseResponse()
            try:
                courseid = request.GET.get("couseid")
                key ="shopping_car_%s_%s*"%(USER_ID,courseid)
                CONN.delete(key)
                respone.data ="删除成功"
            except Exception as e:
                respone.code =10006
                respone.error ="删除失败"
            return Response("删除成功")

    ===================购物车逻辑=========================

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  • 原文地址:https://www.cnblogs.com/mengbin0546/p/9447448.html
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