实战丨如何制作一个完整的外卖微信小程序开发项目（已开源）

{
   "miniprogramRoot": "./miniprogram"
   "cloudfunctionRoot": "./cloud/"
}

const db = wx.cloud.database()
const { showModal } = require('../../utils/utils')

Page({
  onLoad: function(options) {
    // 管理员认证
    getApp().auth()
    if (options.objectId) {
      // 缓存数据
      this.setData({
        isEdit: true,
        objectId: options.objectId
      })
      // 请求待编辑的分类对象
      db.collection('Category')
        .doc(options.objectId)
        .get()
        .then(res => { 
        // 获取分类信息
          this.setData({
            category: res.data
          })
        })
    }
  },
  add: function(e) {
    var form = e.detail.value
    if (form.title == '') {
      wx.showModal({
        title: '请填写分类名称',
        showCancel: false
      })
      return
    }
    form.priority = Number.parseInt(form.priority)

    // 添加或者修改分类
    // 修改模式
    if (this.data.isEdit) {
      const category = this.data.category
      db.collection('Category')
        .doc(category._id)
        .update({
          data: form
        })
        .then(res => {
          console.log(res)
          showModal()
        })
    } else {
      db.collection('Category')
        .add({
          data: form
        })
        .then(res => {
          console.log(res)
          showModal()
        })
    }
  },
  showModal() {
    // 操作成功提示并返回上一页
    wx.showModal({
      title: this.data.isEdit ? '修改成功' : '添加成功',
      showCancel: false,
      success: () => {
        wx.navigateBack()
      }
    })
  },
  delete: function() {
    // 确认删除对话框
    wx.showModal({
      title: '确认删除',
      success: res => {
        if (res.confirm) {
          const category = this.data.category
          db.collection('Category')
            .doc(category._id)
            .remove()
            .then(res => {
              console.log(res)
              wx.showToast({
                title: '删除成功'
              })
              wx.navigateBack()
            })
        }
      }
    })
  }
})

const cloud = require('wx-server-sdk')

cloud.init()

const db = cloud.database()

// 云函数入口函数
exports.main = async (event, context) => {
  const result = await db.collection('Food')
    .aggregate()
    .lookup({
      from: 'Category',
      localField: 'category',
      foreignField: '_id',
      as: 'categories'
    })
    .end()
    // .orderBy('priority', 'asc')
    // .get()
    console.log(result)
    return result.list
}

chooseImage() {
    wx.chooseImage({
      count: 1, // 默认9
      sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有
      sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
      success: res => {
        const tempFilePaths = res.tempFilePaths
        const file = tempFilePaths[0]
        const name = utils.random_filename(file) //上传的图片的别名，建议可以用日期命名
        console.log(name)
        wx.cloud.uploadFile({
          cloudPath: name,
          filePath: file, // 文件路径
        }).then(res => {
          console.log(res)
          const fileId = res.fileID
        // 将文件id保存到数据库表中
          db.collection('Seller').doc(this.data.seller._id)
          .update({
            data: {
              logo_url: fileId
            }
          }).then(() => {
            wx.showToast({
              title: '上传成功'
            })
            // 渲染本地头像
            this.setData({
              new_logo: fileId
            })
          }, err => {
            console.log(err)
            wx.showToast({
              title: '上传失败'
            })
          })
        })
      }
    })
  }

const cloud = require('wx-server-sdk')

cloud.init({
  env: cloud.DYNAMIC_CURRENT_ENV
})

// 云函数入口函数
exports.main = async (event, context) => {
  console.log('请求中')
  console.log(cloud.getWXContext().ENV)
  let { orderId, amount, body } = event
  const wxContext = cloud.getWXContext()
  const res = await cloud.cloudPay.unifiedOrder({
    body: body,
    outTradeNo: orderId,
    spbillCreateIp: '127.0.0.1',
    subMchId: '1447716902',
    totalFee: amount,
    envId: 'dinner-cloud',
    functionName: 'pay_cb'
  })
  return res.payment
}

const { result: payData } = res
  wx.requestPayment({
    timeStamp: payData.timeStamp,
    nonceStr: payData.nonceStr,
    package: payData.package,
    signType: 'MD5',
    paySign: payData.paySign,
    success: res => {
      console.log('支付成功', res)
      wx.showModal({
        title: '支付成功',
        showCancel: false,
        success: () => {
          // 跳转订单详情页
          wx.navigateTo({
            url: '/order/detail/detail?objectId=' + order._id
          })
        }
      })
    },
...

// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init({
  // API 调用都保持和云函数当前所在环境一致
  env: cloud.DYNAMIC_CURRENT_ENV
})
const db = cloud.database()

// 云函数入口函数
exports.main = async (event, context) => {
  console.log('支付回调')
  console.log(event)
  console.log(cloud.getWXContext().ENV)
  const orderId = event.outTradeNo
  const resultCode = event.resultCode
  if (resultCode === 'SUCCESS') {
    const res = await db
      .collection('Order')
      .doc(orderId)
      .update({
        data: {
          status: 1
        }
      })
    console.log(res)
    return { errcode: 0 }
  }
}