WeChat Mini Program - Built-in Cloud Support

Reference

Cloud Database

JSON Database
Table: Collection(/Array of JSON)
ROW: Record/Doc(/JSON)
Column: Field

API: Mini-program Side & Server Side

Mini-program side(access control):

• for less sensitive data

Server side:

• via Cloud function
• CRUD
• for sensitive data

Accessing

1. retrieve a database
   wx.cloud.database()
2. construct the query
   collection(): retrieve a collection
   where(): form a query
3. initiate the request
   get()

db.collection('books').where({
  publishInfo: {
    country: 'United States'
  }
}).get({
  success: function(res) {
  // 输出 [{ "title": "The Catcher in the Rye", ... }]
  console.log(res)
 }
})

Advanced Query

//todo

Cloud Storage

API: Mini-program & Cloud function

wx.cloud.uploadFile()
wx.cloud.downloadFile()

wx.cloud.uploadFile({
    cloudPath: 'xy.png',
    filePath: chooseResult.temFilePath[0],
    success: res => {}
})

Cloud Function

Cloud function

• entry: index.js
• default: exports.main
• Context: require('wx-server-sdk').getWXContext() provide default login status of appid and openid

const cloud = require('ex-server-sdk')
exports.main = (event, context) => {
    let { userInfo, a, b } = event
    let { OPENID, APPID } = cloud.getWXContent()
    
    return {
        OPENID,
        APPID,
        x,
        y
    }
}

Invoke

wx.cloud.callFunction({
  name: 'add',
  data: {
    a: 12,
    b: 19
  }
}).then(console.log)

Cloud Invoke

utilise Mini Program API in the server side (e.g. send templated message, acquire mini-program code)

Send Templated Message(模板消息)

Invoking from a mini program, but messages are sent through server

Cloud Function

async function sendTemplateMessage(event) {
  // get openid of a user
  const { OPENID } = cloud.getWXContext()

  // constructe a function of adding message template
  const addResult = await cloud.openapi.templateMessage.addTemplate({
    id: 'AT0002',
    keywordIdList: [3, 4, 5]
  })

  // template ID
  const templateId = addResult.templateId

  // constructe a function of sending a message with a message template
  // formId: formId of the data to be sent (such as event.formId)
  // page: redirect url if the message card is clicked
  const sendResult = await cloud.openapi.templateMessage.send({
    touser: OPENID,
    templateId,
    formId: event.formId,
    page: 'pages/openapi/openapi',
    data: {
      keyword1: {
        value: '未名咖啡屋',
      },
      keyword2: {
        value: '2019 年 1 月 1 日',
      },
      keyword3: {
        value: '拿铁',
      },
    }
  })

  // delete message template
  await cloud.openapi.templateMessage.deleteTemplate({
    templateId,
  })

  return sendResult
}

Invoke from Mini-program

wx.cloud.callFunction({
  // Cloud function and data to pass
  name: 'openapi',
  data: {
    action: 'sendTemplateMessage',
    formId: e.detail.formId,
  },
  // if the request successes
  success: res => {
    console.warn('[云函数] [openapi] templateMessage.send 调用成功：', res)
    wx.showModal({
      title: '发送成功',
      content: '请返回微信主界面查看',
      showCancel: false,
    })
    wx.showToast({
      title: '发送成功，请返回微信主界面查看',
    })
    this.setData({
      templateMessageResult: JSON.stringify(res.result)
    })
  },
  // if the request fails
  fail: err => {
    wx.showToast({
      icon: 'none',
      title: '调用失败',
    })
    console.error('[云函数] [openapi] templateMessage.send 调用失败：', err)
  }
})

HTTP API

All cloud services are accessable as HTTP API

---

Open Data

Step 1 CloudID

wx.cloud.callFunction({
  name: 'myFunction',
  data: {
    weRunData: wx.cloud.CloudID('xxx'), // 这个 CloudID 值到云函数端会被替换
    obj: {
      shareInfo: wx.cloud.CloudID('yyy'), // 非顶层字段的 CloudID 不会被替换，会原样字符串展示
    }
  }
})

Step 2 Cloud Invoke

// event
{
  // weRunData 的值已被替换为开放数据
  "weRunData": {
    "cloudID": "xxx",
    "data": {
      "stepInfoList": [
        {
          "step": 5000,
          "timestamp": 1554814312,
        }
      ],
      "watermark": {
        "appid": "wx1111111111",
        "timestamp": 1554815786
      }
    }
  },
  "obj": {
    // 非顶层字段维持原样
    "shareInfo": "yyy",
  }
}

---

Customer Service

Standard

The simplest way of handling customer message is by assigning a wechat user as Customer service responder in the mini program dashboard.

Cloud Function

Once set up, customer message will be push directly to the Cloud, therefore bypass the customer service responders

Configure via the Development Tool

add a message-push record

Program a Cloud Function to response