wx.cloud.init({env:envname})

 const db = wx.cloud.database()
  const test = db.collection('test')

  wx.cloud.init({env:'minicloud'})
  const db = wx.cloud.database()
  const test = db.collection('test')

  test.add({
   // data 字段表示需新增的 JSON 数据
   data: {

    name: "Bill",
    age:30    
   },
   success: function (res) {    
    // 输出成功插入后的id以及其他信息
    console.log(res)
   }
  })

{
 "cloud": true,
 "pages": [
  "pages/main/main",
  "pages/userConsole/userConsole",
  "pages/storageConsole/storageConsole",
  "pages/databaseGuide/databaseGuide",
  "pages/addFunction/addFunction",
  "pages/deployFunctions/deployFunctions",
  "pages/chooseLib/chooseLib"
 ],
 "window": {
  "backgroundColor": "#F6F6F6",
  "backgroundTextStyle": "light",
  "navigationBarBackgroundColor": "#F6F6F6",
  "navigationBarTitleText": "云开发 QuickStart",
  "navigationBarTextStyle": "black"
 }
}

<view>
 <input style='margin-top: 40rpx;' placeholder="请输入姓名" value="{{name}}" bindinput="bindKeyInputName" />
 <input style='margin-top: 40rpx;' placeholder="请输入年龄" value="{{age}}" bindinput="bindKeyInputAge" />
 <button style='margin-top: 40rpx;' bindtap='insertData'>插入数据</button>
 <input style='margin-top: 40rpx;' placeholder="请输入记录ID" value="{{recordId}}" bindinput="bindKeyInputId" />

 <button style='margin-top: 40rpx;' bindtap='queryData'>查询数据</button>

 <text style='margin-top: 40rpx;'>
   姓名：{{nameResult}}
 </text>
 <text style='margin-top: 80rpx;'>
   年龄：{{ageResult}}
 </text>
</view>

 onGetOpenid: function() {
  // 调用云函数
  wx.cloud.callFunction({
   name: 'login',
   data: {},
   success: res => {
    console.log('[云函数] [login] user openid: ', res.result.openid)
    app.globalData.openid = res.result.openid
    wx.navigateTo({
     url: '../userConsole/userConsole',
    })
   },
   fail: err => {
    console.error('[云函数] [login] 调用失败', err)
    wx.navigateTo({
     url: '../deployFunctions/deployFunctions',
    })
   }
  })
 }

db.collection(集合名）.doc(记录ID）.get(
  {
    // 查询到数据后触发，res参数值包含的查询到 数据
    success:function(res) {
    },
    // 未查询到数据触发
    fail:function(res) {
   }
})

// miniprogram/pages/main/main.js
const app = getApp()
Page({

 /**
  * 页面的初始数据
  */
 db:undefined,
 test:undefined,
 data: {
  name:'',
  age:'',
  recordId:'',
  nameResult:'',
  ageResult:''  
 },

 /**
  * 生命周期函数--监听页面加载
  */
 onLoad: function (options) {
  var that = this
  // 调用login云函数获取openid
  wx.cloud.callFunction({
   name: 'login',
   data: {},
   success: res => {
    console.log('[云函数] [login] user openid: ', res.result.openid)
    app.globalData.openid = res.result.openid
    wx.cloud.init({ env: 'minicloud' })
    that.db = wx.cloud.database()
    that.test = that.db.collection('test')
   },
   fail: err => {
    console.error('[云函数] [login] 调用失败', err)
    wx.navigateTo({
     url: '../deployFunctions/deployFunctions',
    })
   }
  })

 },
 // 单击“插入数据”按钮调用该函数
 insertData:function() {
  var that = this
  try
  {
   // 将年龄转换为整数类型值
   var age = parseInt(that.data.age)
   // 如果输入的年龄不是数字，会显示错误对话框，并退出该函数
   if(isNaN(age))
   {
    // 显示错误对话框
    wx.showModal({
     title: '错误',
     content: '请输入正确的年龄',
     showCancel: false
    })
    return
   } 
   // 向test数据集添加记录
   this.test.add({
    // data 字段表示需新增的 JSON 数据
    data: {
     name: that.data.name,
     age: age
    },
    // 数据插入成功，调用该函数
    success: function (res) {
     console.log(res)
     wx.showModal({
      title: '成功',
      content: '成功插入记录',
      showCancel:false
     })
     that.setData({
      name:'',
      age:''
     })
    }
   })
  }
  catch(e)
  {
   wx.showModal({
    title: '错误',
    content: e.message,
    showCancel: false
   })

  }
 },
 // 单击“查询数据”按钮执行该函数
 queryData:function() {
  var that = this
   // 根据记录ID搜索数据集 
  this.db.collection('test').doc(this.data.recordId).get({
   // 找到记录集调用
   success: function (res) { 
     // 将查询结果显示在页面上 
    that.setData({
     nameResult:res.data.name,
     ageResult:res.data.age
    })

   },
   // 未查到数据时调用
   fail:function(res) {
    wx.showModal({
     title: '错误',
     content: '没有找到记录',
     showCancel: false
    })
   }
  })

 },
 // 下面的函数用于当更新input组件中的值时同时更新对应变量的值
 bindKeyInputName: function (e) {
  this.setData({
   name: e.detail.value
  })
 },
 bindKeyInputAge:function(e) {
  this.setData({
   age: e.detail.value
  })
 },
 bindKeyInputId:function(e) {
  this.setData({
   recordId:e.detail.value
  })
 },

})