## 1 支付宝二次封装
```python
al_pay
-pem
-__init__.py
-pay.py
-setting.py
#__init__.py
from .pay import alipay,gateway
#pay.py
from alipay import AliPay
from . import setting
alipay = AliPay(
appid=setting.APPID,
app_notify_url=None, # the default notify path
app_private_key_string=setting.APP_PRIVATE_KEY_STRING,
# alipay public key, do not use your own public key!
alipay_public_key_string=setting.ALIPAY_PUBLIC_KEY_STRING,
sign_type=setting.SIGN_TYPE, # RSA or RSA2
debug=setting.DEBUG # False by default
)
gateway=setting.GATEWAY
# setting.py
import os
APPID="2016092000554611"
APP_PRIVATE_KEY_STRING = open(os.path.join(os.path.dirname(__file__),'pem','private_key.pem')).read()
ALIPAY_PUBLIC_KEY_STRING = open(os.path.join(os.path.dirname(__file__),'pem','al_public_key.pem')).read()
SIGN_TYPE='RSA2'
DEBUG=True
GATEWAY='https://openapi.alipaydev.com/gateway.do?' if DEBUG else 'https://openapi.alipay.com/gateway.do?'
```
## 2 订单模块与表分析
```python
# 订单表分析
-订单表
-订单详情
from django.db import models
from django.db import models
from user.models import User
from course.models import Course
# 订单表
class Order(models.Model):
"""订单模型"""
status_choices = (
(0, '未支付'),
(1, '已支付'),
(2, '已取消'),
(3, '超时取消'),
)
pay_choices = (
(1, '支付宝'),
(2, '微信支付'),
)
subject = models.CharField(max_length=150, verbose_name="订单标题")
total_amount = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="订单总价", default=0)
out_trade_no = models.CharField(max_length=64, verbose_name="订单号", unique=True)
trade_no = models.CharField(max_length=64, null=True, verbose_name="流水号") # 支付宝生成回来的
order_status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="订单状态")
pay_type = models.SmallIntegerField(choices=pay_choices, default=1, verbose_name="支付方式")
pay_time = models.DateTimeField(null=True, verbose_name="支付时间")
# 一个用户可以下多个订单，一个订单只属于一个用户，一对多的关系，关联字段写在多个一方，写在order方
user = models.ForeignKey(User, related_name='order_user', on_delete=models.DO_NOTHING, db_constraint=False, verbose_name="下单用户")
created_time = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
updated_time = models.DateTimeField(auto_now=True, verbose_name='最后更新时间')
class Meta:
db_table = "luffy_order"
verbose_name = "订单记录"
verbose_name_plural = "订单记录"
def __str__(self):
return "%s - ￥%s" % (self.subject, self.total_amount)
@property
def courses(self):
data_list = []
for item in self.order_courses.all():
data_list.append({
"id": item.id,
"course_name": item.course.name,
"real_price": item.real_price,
})
return data_list
# 订单详情表
# 订单和详情是一对多，关联字段写在多个的一方，写在订单详情表中
class OrderDetail(models.Model):
"""订单详情"""
order = models.ForeignKey(Order, related_name='order_courses', on_delete=models.CASCADE, db_constraint=False, verbose_name="订单")
course = models.ForeignKey(Course, related_name='course_orders', on_delete=models.SET_NULL, db_constraint=False, verbose_name="课程",null=True)
price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价")
real_price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程实价")
class Meta:
db_table = "luffy_order_detail"
verbose_name = "订单详情"
verbose_name_plural = "订单详情"
def __str__(self):
try:
return "%s的订单：%s" % (self.course.name, self.order.out_trade_no)
except:
return super().__str__()
```
## 3 订单模块接口分析
```python
# 1 支付接口（生成订单,，生成支付连接，返回支付连接）
-order表和orderdetail表插入数据，重写create方法
-生成订单号（uuid）
-登录后才能做（jwt认证）
-当前登录用户就是下单用户，存到order表中
-下了三个课程，总价格100，前端提交的价格是99，异常处理
'''
#1）订单总价校验
# 2）生成订单号
# 3）支付用户：request.user
# 4）支付链接生成
# 5）入库(两个表)的信息准备
'''
# 2 支付宝异步回调的post接口（验证签名，修改订单状态）
# 3 当支付宝get回调前端，vue组件一创建，立马向后端发一个请求（get）
```
## 4 支付接口
```python
# 1 前端传什么格式数据
-{course:[1,2,3],total_amount:100,subject:xx商品,pay_type:1,}
# 2 后端接到数据要校验
-course:[1,2,3]===》course:[obj1，obj2，obj3]
-在序列化类中： course=serializers.PrimaryKeyRelatedField(queryset=Course.objects.all(), write_only=True, many=True)
# 3 在序列化类的validate中处理一堆逻辑
'''
# 1）订单总价校验：
-一个个课程价格取出来累加看是否等于传入的总价格
# 2）生成订单号
-通过uuid生成
# 3）支付用户：request.user
-通过视图和序列化类之间的桥梁context对象传递
-重新视图类中的create方法，把request对象放入context
-self.context.get('request').user
# 4）支付链接生成
-导入封装的支付宝支付，生成
order_string = alipay.api_alipay_trade_page_pay (
out_trade_no=out_trade_no,
total_amount=total_amout,
subject=subject,
return_url=settings.RETURN_URL, # get回调，前台地址
notify_url=settings.NOTIFY_URL # post回调，后台地址
)
# 5）入库(两个表)的信息准备
-把user放入attrs中
-把订单号，放入attrs中
attrs['user']=user
attrs['out_trade_no']=out_trade_no
self.context['pay_url']=pay_url
'''
# 4 重写序列化类的create方法
-把course_list弹出来
-order=models.Order.objects.create(**validated_data)
```
```python
# urls.py
router = SimpleRouter()
router.register('pay', views.PayView, 'pay')
urlpatterns = [
path('', include(router.urls)),
]
# views.py
class PayView(GenericViewSet,CreateModelMixin):
authentication_classes = [JSONWebTokenAuthentication,]
permission_classes = [IsAuthenticated,]
queryset = models.Order.objects.all()
serializer_class = serializer.OrderSerializer
# 重写create方法
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data,context={'request':request})
serializer.is_valid(raise_exception=True)
self.perform_create(serializer)
return Response(serializer.context.get('pay_url'))
# serializer.py
class OrderSerializer(serializers.ModelSerializer):
# 前端传什么数据过来{course:[1,2,3],total_amount:100,subject:xx商品,pay_type:1,}
# user字段需要，但是不是传的，使用了jwt
# 需要把course:[1,2,3] 处理成 course:[obj1,obj2,obj3]
# 课时：[1,4,6,]===>课时：[obj1,obj4,obj6,]
# course=serializers.CharField()
course=serializers.PrimaryKeyRelatedField(queryset=Course.objects.all(), write_only=True, many=True)
class Meta:
model = models.Order
fields = ['total_amount','subject','pay_type','course']
extra_kwargs={
'total_amount':{'required':True},
'pay_type': {'required': True},
}
def _check_price(self,attrs):
total_amount=attrs.get('total_amount')
course_list=attrs.get('course')
total_price=0
for course in course_list:
total_price+=course.price
if total_price!=total_amount:
raise ValidationError('价格不合法')
return total_amount
def _gen_out_trade_no(self):
import uuid
return str(uuid.uuid4()).replace('-','')
def _get_user(self):
# 需要request对象(需要视图通过context把reuqest对象传入。重写create方法)
request=self.context.get('request')
return request.user
def _gen_pay_url(self,out_trade_no,total_amout,subject):
# total_amout是Decimal类型，识别不了，需要转换成float类型
from luffyapi.libs.al_pay import alipay,gateway
order_string = alipay.api_alipay_trade_page_pay (
out_trade_no=out_trade_no,
total_amount=float(total_amout),
subject=subject,
return_url=settings.RETURN_URL, # get回调，前台地址
notify_url=settings.NOTIFY_URL # post回调，后台地址
)
return gateway+order_string
def _before_create(self,attrs,user,pay_url,out_trade_no):
attrs['user']=user
attrs['out_trade_no']=out_trade_no
self.context['pay_url']=pay_url
def validate(self, attrs):
'''
# 1）订单总价校验
# 2）生成订单号
# 3）支付用户：request.user
# 4）支付链接生成
# 5）入库(两个表)的信息准备
'''
# 1）订单总价校验
total_amout = self._check_price(attrs)
# 2）生成订单号
out_trade_no=self._gen_out_trade_no()
# 3）支付用户：request.user
user=self._get_user()
# 4）支付链接生成
pay_url=self._gen_pay_url(out_trade_no,total_amout,attrs.get('subject'))
# 5）入库(两个表)的信息准备
self._before_create(attrs,user,pay_url,out_trade_no)
return attrs
def create(self, validated_data):
course_list=validated_data.pop('course')
order=models.Order.objects.create(**validated_data)
for course in course_list:
models.OrderDetail.objects.create(order=order,course=course,price=course.price,real_price=course.price)
return order
```
## 5 前后台回调接口配置
```python
# dev.py
# 上线后必须换成公网地址
# 后台基URL
BASE_URL = 'http://127.0.0.1:8000'
# 前台基URL
LUFFY_URL = 'http://127.0.0.1:8080'
# 支付宝同步异步回调接口配置
# 后台异步回调接口
NOTIFY_URL = BASE_URL + "/order/success/"
# 前台同步回调接口，没有 / 结尾
RETURN_URL = LUFFY_URL + "/pay/success"
```
## 6 前台生成订单并跳转
```python
# FreeCourse.vue
<span class="buy-now" @click="buy_now(course)">立即购买</span>
# script
buy_now(course) {
let token = this.$cookies.get('token')
if (!token) {
this.$message({
message: "您还没有登录，请先登录",
})
return false
}
this.$axios({
method: 'post',
url: this.$settings.base_url + '/order/pay/',
data: {
"total_amount": course.price,
"subject": course.name,
"pay_type": 1,
"course": [
course.id,
]
},
headers: {Authorization: 'jwt ' + token}
}
).then(response => {
console.log(response.data)
let pay_url=response.data
//前端发送get请求
open(pay_url,'_self')
}).catch(error => {
})
},
```
## 7 前台支付成功页面
```python
# 路由
{
path: '/pay/success',
name: 'PaySuccess',
component: PaySuccess
},
#PaySuccess.vue
<template>
<div class="pay-success">
<!--如果是单独的页面，就没必要展示导航栏(带有登录的用户)-->
<Header/>
<div class="main">
<div class="title">
<div class="success-tips">
<p class="tips">您已成功购买 1 门课程！</p>
</div>
</div>
<div class="order-info">
<p class="info"><b>订单号：</b><span>{{ result.out_trade_no }}</span></p>
<p class="info"><b>交易号：</b><span>{{ result.trade_no }}</span></p>
<p class="info"><b>付款时间：</b><span><span>{{ result.timestamp }}</span></span></p>
</div>
<div class="study">
<span>立即学习</span>
</div>
</div>
</div>
</template>
<script>
import Header from "@/components/Head"
export default {
name: "Success",
data() {
return {
result: {},
};
},
created() {
// url后拼接的参数：?及后面的所有参数 => ?a=1&b=2
// console.log(location.search);
// 解析支付宝回调的url参数
let params = location.search.substring(1); // 去除? => a=1&b=2
let items = params.length ? params.split('&') : []; // ['a=1', 'b=2']
//逐个将每一项添加到args对象中
for (let i = 0; i < items.length; i++) { // 第一次循环a=1，第二次b=2
let k_v = items[i].split('='); // ['a', '1']
//解码操作，因为查询字符串经过编码的
if (k_v.length >= 2) {
// url编码反解
let k = decodeURIComponent(k_v[0]);
this.result[k] = decodeURIComponent(k_v[1]);
// 没有url编码反解
// this.result[k_v[0]] = k_v[1];
}
}
// 解析后的结果
// console.log(this.result);
// 把地址栏上面的支付结果，再get请求转发给后端
this.$axios({
url: this.$settings.base_url + '/order/success/' + location.search,
method: 'get',
}).then(response => {
console.log(response.data);
}).catch(() => {
console.log('支付结果同步失败');
})
},
components: {
Header,
}
}
</script>
<style scoped>
.main {
padding: 60px 0;
margin: 0 auto;
width: 1200px;
background: #fff;
}
.main .title {
display: flex;
-ms-flex-align: center;
align-items: center;
padding: 25px 40px;
border-bottom: 1px solid #f2f2f2;
}
.main .title .success-tips {
box-sizing: border-box;
}
.title img {
vertical-align: middle;
width: 60px;
height: 60px;
margin-right: 40px;
}
.title .success-tips {
box-sizing: border-box;
}
.title .tips {
font-size: 26px;
color: #000;
}
.info span {
color: #ec6730;
}
.order-info {
padding: 25px 48px;
padding-bottom: 15px;
border-bottom: 1px solid #f2f2f2;
}
.order-info p {
display: -ms-flexbox;
display: flex;
margin-bottom: 10px;
font-size: 16px;
}
.order-info p b {
font-weight: 400;
color: #9d9d9d;
white-space: nowrap;
}
.study {
padding: 25px 40px;
}
.study span {
display: block;
width: 140px;
height: 42px;
text-align: center;
line-height: 42px;
cursor: pointer;
background: #ffc210;
border-radius: 6px;
font-size: 16px;
color: #fff;
}
</style>
```
### 支付宝get回调参数
```python
charset=utf-8&
out_trade_no=17fcf8cac17c442bbbc114df6004afff&
method=alipay.trade.page.pay.return&
total_amount=99.00&
sign=WfK2beWFKvVaTHXpREi8HqZtFRH3JbeIvkliReYvfuhAsqaxHguARKtW6jUqUdZinm7ZSaYE1NrBRQa3%2BLquMk6uMnxE0i%2FTXIu4%2FmNTCEqSUlG8fTRPwC2%2BuU4nN1Ym0eM4puzAc2TUnEJnXCGKP9UxMifN3cjqR5BP%2B3RRngZSS4IQeogjurpfdiIolLzed%2FHTWbc4HqvWlWn9JuLmFGTtKHvRRKFr1hqq8Pj%2Fe3Al8kieDN9Q7JhEdC6F5ROo9rLlmUJtevkjI22oRScrfJl5hb%2BeYosxNg3WktmYKlF5vsKeZKKnLayAvKGoySLvaWk90x0LijHzzf2%2F8a9s3w%3D%3D&
trade_no=2020072922001480160500851368&
auth_app_id=2016092000554611&
version=1.0&
app_id=2016092000554611&
sign_type=RSA2&
seller_id=2088102176466324&
timestamp=2020-07-29%2015%3A06%3A44
```
## 8 同步异步回调接口
```python
class SuccessView(APIView):
def get(self,request,*args,**kwargs):
out_trade_no=request.query_params.get('out_trade_no')
order=models.Order.objects.filter(out_trade_no=out_trade_no).first()
if order.order_status==1:
return Response(True)
else:
return Response(False)
def post(self,request,*args,**kwargs):
'''
支付宝回调接口
'''
from luffyapi.libs.al_pay import alipay
from luffyapi.utils.logger import log
data = request.data
out_trade_no=data.get('out_trade_no',None)
gmt_payment=data.get('gmt_payment',None)
signature = data.pop("sign")
# 验证签名
success = alipay.verify(data, signature)
if success and data["trade_status"] in ("TRADE_SUCCESS", "TRADE_FINISHED"):
models.Order.objects.filter(out_trade_no=out_trade_no).update(order_status=1,pay_time=gmt_payment)
log.info('%s订单支付成功'%out_trade_no)
return Response('success')
else:
log.info('%s订单有问题' % out_trade_no)
return Response('error')
```
## 9 上线前准备
```python
# 前端执行 npm run build 把你写的vue代码编译成html，css，js
# 后端代码
-修改setting中的pro.py
-项目根路径新建一个manage_pro.py（把原来的manage.py复制改动上线的配置文件）
-wsgi.py:改成线上的dev
```
