定义全局变量，全局可调用openid

scr/food/app.js

@@ -15,15 +15,25 @@ App({
         traceUser: true,
       });
     }
-
+this.getOpenid()
     this.globalData = {};
-  },//触底函数
+    // 获取用户openid
-  onReachBottom(){
+  
-      console.log("上拉加载....");
-  },
-  //上拉函数
-  onPullDownRefresh(){
-      console.log("下拉刷新...");
-  },
   
-});
+},
+getOpenid() {
+    let that = this;
+    wx.cloud.callFunction({
+      name: 'get',
+      complete: res => {
+        console.log('openid: ', res.result.openid)
+        console.log('appid: ', res.result.appid)
+        // var openid = res.result.openId;
+        // that.setData({
+        //   openid: openid
+        // })
+      }
+    })
+
+ }
+})

scr/food/cloudfunctions/get/config.json

@@ -0,0 +1,6 @@
+{
+  "permissions": {
+    "openapi": [
+    ]
+  }
+}

scr/food/cloudfunctions/get/index.js

@@ -0,0 +1,16 @@
+// 云函数入口文件
+const cloud = require('wx-server-sdk')
+
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV }) // 使用当前云环境
+
+// 云函数入口函数
+exports.main = async (event, context) => {
+  const wxContext = cloud.getWXContext()
+
+  return {
+    event,
+    openid: wxContext.OPENID,
+    appid: wxContext.APPID,
+    unionid: wxContext.UNIONID,
+  }
+}

scr/food/cloudfunctions/get/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "get",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "wx-server-sdk": "~2.6.3"
+  }
+}

scr/food/cloudfunctions/quickstartFunctions/config.json

@@ -0,0 +1,7 @@
+{
+  "permissions": {
+    "openapi": [
+      "wxacode.get"
+    ]
+  }
+}

scr/food/cloudfunctions/quickstartFunctions/createCollection/index.js

@@ -0,0 +1,56 @@
+const cloud = require('wx-server-sdk');
+
+cloud.init({
+  env: cloud.DYNAMIC_CURRENT_ENV
+});
+
+const db = cloud.database();
+
+// 创建集合云函数入口函数
+exports.main = async (event, context) => {
+  try {
+    // 创建集合
+    await db.createCollection('sales');
+    await db.collection('sales').add({
+      // data 字段表示需新增的 JSON 数据
+      data: {
+        region: '华东',
+        city: '上海',
+        sales: 11
+      }
+    });
+    await db.collection('sales').add({
+      // data 字段表示需新增的 JSON 数据
+      data: {
+        region: '华东',
+        city: '南京',
+        sales: 11
+      }
+    });
+    await db.collection('sales').add({
+      // data 字段表示需新增的 JSON 数据
+      data: {
+        region: '华南',
+        city: '广州',
+        sales: 22
+      }
+    });
+    await db.collection('sales').add({
+      // data 字段表示需新增的 JSON 数据
+      data: {
+        region: '华南',
+        city: '深圳',
+        sales: 22
+      }
+    });
+    return {
+      success: true
+    };
+  } catch (e) {
+    // 这里catch到的是该collection已经存在，从业务逻辑上来说是运行成功的，所以catch返回success给前端，避免工具在前端抛出异常
+    return {
+      success: true,
+      data: 'create collection success'
+    };
+  }
+};

scr/food/cloudfunctions/quickstartFunctions/getMiniProgramCode/index.js

@@ -0,0 +1,20 @@
+const cloud = require('wx-server-sdk');
+
+cloud.init({
+  env: cloud.DYNAMIC_CURRENT_ENV
+});
+
+// 获取小程序二维码云函数入口函数
+exports.main = async (event, context) => {
+  // 获取小程序二维码的buffer
+  const resp = await cloud.openapi.wxacode.get({
+    path: 'pages/index/index'
+  });
+  const { buffer } = resp;
+  // 将图片上传云存储空间
+  const upload = await cloud.uploadFile({
+    cloudPath: 'code.png',
+    fileContent: buffer
+  });
+  return upload.fileID;
+};

scr/food/cloudfunctions/quickstartFunctions/getOpenId/index.js

@@ -0,0 +1,17 @@
+const cloud = require('wx-server-sdk');
+
+cloud.init({
+  env: "cloud1-8g5wmepxce8a3b8a"
+});
+
+// 获取openId云函数入口函数
+exports.main = async (event, context) => {
+  // 获取基础信息
+  const wxContext = cloud.getWXContext();
+
+  return {
+    openid: wxContext.OPENID,
+    appid: wxContext.APPID,
+    unionid: wxContext.UNIONID,
+  };
+};

scr/food/cloudfunctions/quickstartFunctions/index.js

@@ -0,0 +1,25 @@
+const getOpenId = require('./getOpenId/index');
+const getMiniProgramCode = require('./getMiniProgramCode/index');
+const createCollection = require('./createCollection/index');
+const selectRecord = require('./selectRecord/index');
+const updateRecord = require('./updateRecord/index');
+const sumRecord = require('./sumRecord/index');
+
+
+// 云函数入口函数
+exports.main = async (event, context) => {
+  switch (event.type) {
+    case 'getOpenId':
+      return await getOpenId.main(event, context);
+    case 'getMiniProgramCode':
+      return await getMiniProgramCode.main(event, context);
+    case 'createCollection':
+      return await createCollection.main(event, context);
+    case 'selectRecord':
+      return await selectRecord.main(event, context);
+    case 'updateRecord':
+      return await updateRecord.main(event, context);
+    case 'sumRecord':
+      return await sumRecord.main(event, context);
+  }
+};

scr/food/cloudfunctions/quickstartFunctions/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "quickstartFunctions",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "wx-server-sdk": "~2.4.0"
+  }
+}

scr/food/cloudfunctions/quickstartFunctions/selectRecord/index.js

@@ -0,0 +1,12 @@
+const cloud = require('wx-server-sdk');
+
+cloud.init({
+  env: cloud.DYNAMIC_CURRENT_ENV
+});
+const db = cloud.database();
+
+// 查询数据库集合云函数入口函数
+exports.main = async (event, context) => {
+  // 返回数据库查询结果
+  return await db.collection('sales').get();
+};

scr/food/cloudfunctions/quickstartFunctions/sumRecord/index.js

@@ -0,0 +1,18 @@
+const cloud = require('wx-server-sdk');
+
+cloud.init({
+  env: cloud.DYNAMIC_CURRENT_ENV
+});
+const db = cloud.database();
+const $ = db.command.aggregate;
+
+// 聚合记录云函数入口函数
+exports.main = async (event, context) => {
+  // 返回数据库聚合结果
+  return db.collection('sales').aggregate()
+    .group({
+      _id: '$region',
+      sum: $.sum('$sales')
+    })
+    .end();
+};

scr/food/cloudfunctions/quickstartFunctions/updateRecord/index.js

@@ -0,0 +1,32 @@
+const cloud = require('wx-server-sdk');
+
+cloud.init({
+  env: cloud.DYNAMIC_CURRENT_ENV
+});
+const db = cloud.database();
+
+// 修改数据库信息云函数入口函数
+exports.main = async (event, context) => {
+  try {
+    // 遍历修改数据库信息
+    for (let i = 0; i < event.data.length; i++) {
+      await db.collection('sales').where({
+        _id: event.data[i]._id
+      })
+        .update({
+          data: {
+            sales: event.data[i].sales
+          },
+        });
+    }
+    return {
+      success: true,
+      data: event.data
+    };
+  } catch (e) {
+    return {
+      success: false,
+      errMsg: e
+    };
+  }
+};

scr/food/pages/detail/detail.js

@@ -14,16 +14,21 @@ Page({
     userid:null,
     num:null
     
+   
   },
 
   /**
    * 生命周期函数--监听页面加载
    */
+
+
   onLoad: function (options) {
    
+ const app=getApp()
   let foodid =options.id
-  var userid=options.aid
+  var userid=app.globalData.openid
-  console.log('1111wb');
+  console.log('1111w ');
+ console.log(userid)
  
   cont.doc(foodid).get({
     success: res => {