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1. POST请求，去结算
请求体：
{
courseids:[1,2]
}
业务处理：
1. 检测课程ID是否已经加入到购物车
2. 获取指定价格策略信息
3. 获取优惠券信息
4. 构造结构放入redis
2. GET请求，获取结算中心数据
业务处理：
1. 获取结算中心里的课程信息（绑定课程优惠券）
2. 获取全局优惠券
3. PATCH请求，选择优惠券
请求体：
{
courseid:0
couponid:12
}
业务处理：
1. 校验结算中心是否存在该课程
2. 校验优惠券是否可用
注意：
1. 优惠券状态
2. 优惠券使用时间
5、构建目标数据结构
结算数据结构：
payment_dict = {
'2': {
course_id:2,
'title': '法务一',
'img': '1.jpg', 'policy_id': '4',
'coupon': {},
'default_coupon': 0,
'period': 210, 'period_display': '12个月', 'price': 122.0},
'1': {
course_id:2,
'title': '法务2',
'img': '2.jpg',
'policy_id': '2',
'coupon': {
4: {'coupon_type': 0, 'coupon_display': '立减券', 'money_equivalent_value': 40},
6: {'coupon_type': 1, 'coupon_display': '满减券', 'money_equivalent_value': 60, 'minimum_consume': 100}
},
'default_coupon': 0,
'period': 60,
'period_display': '2个月',
'price': 599.0}
}
global_coupon_dict = {
'coupon': {
2: {'coupon_type': 1, 'coupon_display': '满减券', 'money_equivalent_value': 200, 'minimum_consume': 500}
},
'default_coupon': 0
}
========================== redis ==============================
redis = {
payment_1_2:{
course_id:2,
'title': '法务1',
'img': '1.jpg', 'policy_id': '4',
'coupon': {},
'default_coupon': 0,
'period': 210, 'period_display': '12个月', 'price': 122.0},
},
payment_1_1:{
course_id:1,
'title': '法务2',
'img': '2.jpg',
'policy_id': '2',
'coupon': {
4: {'coupon_type': 0, 'coupon_display': '立减券', 'money_equivalent_value': 40},
6: {'coupon_type': 1, 'coupon_display': '满减券', 'money_equivalent_value': 60, 'minimum_consume': 100}
},
'default_coupon': 0,
'period': 60,
'period_display': '2个月',
'price': 599.0}
},
payment_global_coupon_1:{
'coupon': {
2: {'coupon_type': 1, 'coupon_display': '满减券', 'money_equivalent_value': 200, 'minimum_consume': 500}
},
'default_coupon': 0
}
}
4.代码
url:
#结算中心
url(r'^payment/$', payment.PaymentViewSet.as_view()),
payment.py中：
class PaymentViewSet(APIView):
authentication_classes = [ApiAuth]
conn = get_redis_connection("default")
def post(self, request, *args, **kwargs):
ret = BaseResponse()
try:
# 清空用户结算中心的数据
# payment_1_*
# payment_coupon_1
key_list = self.conn.keys(settings.PAYMENT_KEY % (request.auth.user_id, "*",))
key_list.append(settings.PAYMENT_COUPON_KEY % (request.auth.user_id,))
self.conn.delete(*key_list)
payment_dict = {}
global_coupon_dict = {
"coupon": {},
"default_coupon": 0
}
# 1.获取用户要结算的课程ID
course_id_list = request.data.get('courseids')
for course_id in course_id_list:
car_key = settings.SHOPPING_CAR_KEY % (request.auth.user_id, course_id)
# 1.1 检测用户结算的课程是否加入购物车
if not self.conn.exists(car_key):
ret.code = 1001
ret.error = "课程需要加入购物车才能结算"
# 1.2从购物车中获取信息，放入结算中心
# 后去标题和图片
policy = json.loads(self.conn.hget(car_key, 'policy').decode('utf-8'))
default_policy = self.conn.hget(car_key, 'default_policy').decode('utf-8')
policy_info = policy[default_policy]
payment_course_dict = {
"course_id": str(course_id),
"title": self.conn.hget(car_key, 'title').decode('utf-8'),
"img": self.conn.hget(car_key, 'img').decode('utf-8'),
"policy_id": default_policy,
"coupon": {},
"default_coupon": 0
}
payment_course_dict.update(policy_info)
payment_dict[str(course_id)] = payment_course_dict
# 2. 获取优惠券
ctime = datetime.date.today() # 获取今天时间
coupon_list = models.CouponRecord.objects.filter(
account=request.auth.user,
status=0,
coupon__valid_begin_date__lte=ctime,
coupon__valid_end_date__gte=ctime,
)
for item in coupon_list:
# 只处理绑定课程的优惠券
if not item.coupon.object_id:
# 优惠券ID
coupon_id = item.id
# 优惠券类型：满减、折扣、立减
coupon_type = item.coupon.coupon_type
info = {}
info['coupon_type'] = coupon_type
info['coupon_display'] = item.coupon.get_coupon_type_display()
if coupon_type == 0: # 立减
info['money_equivalent_value'] = item.coupon.money_equivalent_value
elif coupon_type == 1: # 满减券
info['money_equivalent_value'] = item.coupon.money_equivalent_value
info['minimum_consume'] = item.coupon.minimum_consume
else: # 折扣
info['off_percent'] = item.coupon.off_percent
global_coupon_dict['coupon'][coupon_id] = info
continue
# 优惠券绑定课程的ID
coupon_course_id = str(item.coupon.object_id)
# 优惠券ID
coupon_id = item.id
# 优惠券类型：满减、折扣、立减
coupon_type = item.coupon.coupon_type
info = {}
info['coupon_type'] = coupon_type
info['coupon_display'] = item.coupon.get_coupon_type_display()
if coupon_type == 0: # 立减
info['money_equivalent_value'] = item.coupon.money_equivalent_value
elif coupon_type == 1: # 满减券
info['money_equivalent_value'] = item.coupon.money_equivalent_value
info['minimum_consume'] = item.coupon.minimum_consume
else: # 折扣
info['off_percent'] = item.coupon.off_percent
if coupon_course_id not in payment_dict:
# 获取到优惠券，但是没有购买此课程
continue
# 将优惠券设置到指定的课程字典中
payment_dict[coupon_course_id]['coupon'][coupon_id] = info
# 可以获取绑定的优惠券
# 3. 将绑定优惠券课程+全站优惠券 写入到redis中（结算中心）。
# 3.1 绑定优惠券课程放入redis
for cid, cinfo in payment_dict.items():
pay_key = settings.PAYMENT_KEY % (request.auth.user_id, cid,)
cinfo['coupon'] = json.dumps(cinfo['coupon'])
self.conn.hmset(pay_key, cinfo)
# 3.2 将全站优惠券写入redis
gcoupon_key = settings.PAYMENT_COUPON_KEY % (request.auth.user_id,)
global_coupon_dict['coupon'] = json.dumps(global_coupon_dict['coupon'])
self.conn.hmset(gcoupon_key, global_coupon_dict)
except Exception as e:
ret.code = 1001
ret.error = "提交失败"
return Response(ret.dict)
def patch(self, request, *args, **kwargs):
ret = BaseResponse()
try:
# 1. 用户提交要修改的优惠券
course = request.data.get('courseid')
course_id = str(course) if course else course
coupon_id = str(request.data.get('couponid'))
# payment_global_coupon_1
redis_global_coupon_key = settings.PAYMENT_COUPON_KEY % (request.auth.user_id,)
# 修改全站优惠券
if not course_id:
if coupon_id == "0":
# 不使用优惠券,请求数据：{"couponid":0}
self.conn.hset(redis_global_coupon_key, 'default_coupon', coupon_id)
ret.data = "修改成功"
return Response(ret.dict)
# 使用优惠券,请求数据：{"couponid":2}
coupon_dict = json.loads(self.conn.hget(redis_global_coupon_key, 'coupon').decode('utf-8'))
# 判断用户选择得优惠券是否合法
if coupon_id not in coupon_dict:
ret.code = 1001
ret.error = "全站优惠券不存在"
return Response(ret.dict)
# 选择的优惠券合法
self.conn.hset(redis_global_coupon_key, 'default_coupon', coupon_id)
ret.data = "修改成功"
return Response(ret.dict)
# 修改课程优惠券
#payment_1_1
redis_payment_key = settings.PAYMENT_KEY % (request.auth.user_id, course_id,)
# 不使用优惠券
if coupon_id == "0":
self.conn.hset(redis_payment_key, 'default_coupon', coupon_id)
ret.data = "修改成功"
return Response(ret.dict)
# 使用优惠券
coupon_dict = json.loads(self.conn.hget(redis_payment_key, 'coupon').decode('utf-8'))
if coupon_id not in coupon_dict:
ret.code = 1010
ret.error = "课程优惠券不存在"
return Response(ret.dict)
self.conn.hset(redis_payment_key, 'default_coupon', coupon_id)
except Exception as e:
ret.code = 1111
ret.error = "修改失败"
return Response(ret.dict)
def get(self, request, *args, **kwargs):
ret = BaseResponse()
try:
# payment_1_*
redis_payment_key = settings.PAYMENT_KEY % (request.auth.user_id, "*",)
# payment_coupon_1
redis_global_coupon_key = settings.PAYMENT_COUPON_KEY % (request.auth.user_id,)
# 1. 获取绑定课程信息
course_list = []
for key in self.conn.scan_iter(redis_payment_key):
info = {}
data = self.conn.hgetall(key)
for k, v in data.items():
kk = k.decode('utf-8')
if kk == "coupon":
info[kk] = json.loads(v.decode('utf-8'))
else:
info[kk] = v.decode('utf-8')
course_list.append(info)
# 2.全站优惠券
global_coupon_dict = {
'coupon': json.loads(self.conn.hget(redis_global_coupon_key, 'coupon').decode('utf-8')),
'default_coupon': self.conn.hget(redis_global_coupon_key, 'default_coupon').decode('utf-8')
}
ret.data = {
"course_list": course_list,
"global_coupon_dict": global_coupon_dict
}
except Exception as e:
ret.code = 1001
ret.error = "获取失败"
return Response(ret.dict)
效果：
post:
{"courseids":[1,2]}
get:
{
"data": {
"course_list": [
{
"course_id": "1",
"default_coupon": "0",
"policy_id": "2",
"coupon": {
"1": {
"coupon_type": 1,
"coupon_display": "满减券",
"money_equivalent_value": 60,
"minimum_consume": 100
},
"4": {
"coupon_type": 1,
"coupon_display": "满减券",
"money_equivalent_value": 60,
"minimum_consume": 100
},
"5": {
"coupon_type": 0,
"coupon_display": "通用券",
"money_equivalent_value": 40
}
},
"img": "quanzhan.png",
"period": "720",
"period_display": "24个月",
"title": "法务一",
"price": "3000.0"
},
{
"course_id": "2",
"title": "法务2",
"img": "jinrongfenxi.png",
"policy_id": "4",
"coupon": {},
"default_coupon": "0",
"period": "14",
"period_display": "2周",
"price": "12331.0"
}
],
"global_coupon_dict": {
"coupon": {
"2": {
"coupon_type": 1,
"coupon_display": "满减券",
"money_equivalent_value": 100,
"minimum_consume": 100
},
"3": {
"coupon_type": 0,
"coupon_display": "通用券",
"money_equivalent_value": 100
}
},
"default_coupon": "0"
}
},
"code": 1000,
"error": null
}