Can develop small programs without learning the back end-Introduction to WeChat Mini Program Cloud Development

Introduction to WeChat Mini Program Cloud Development

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Cloud development model

Product Manager-> Front-end Development-> Go Live

	Cloud development	Traditional development
effectiveness	Only care about business logic, high efficiency	Need to focus on non-business logic, low efficiency
cost	Pay on demand, with free credit	Upfront costs need to be paid in advance
Platform	Native integrated WeChat SDK	Develop product logic yourself
O & M	The bottom layer is professionally supported by Tencent Cloud	Self-maintenance system operation, difficult to operate and maintain
speed	Front-end one-stop solution, quick release	Front-end and back-end joint debugging, on-line process

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Cloud development capabilities

• 存储: Mini program terminal directly upload and download cloud files, visual management
• 云函数: Code running in the cloud, WeChat private natural authentication, developers only need to write their own business logic code
• 云数据库: One that can be operated at the front end of the applet, and can also be read and written in cloud functionsJSON数据库
• 音视频服务: Interoperable high-quality real-time audio and video call service, based on cloud development and fast access
• 智能图像服务: Intelligent yellow identification, face recognition, AI visual capabilities, etc., based on cloud development and rapid access

Cloud development storage capacity

Traditional data storage model

Mini Program ——> 后端API——> Database ——> Mini Program

Cloud development data storage model

Applet-> Database-> Applet

一行代码创建数据：

db.collection('todos').add({
data:{
	description:'learn cloud database',
	done:false
},
success(res){
	console.log(res)
}
})

一行代码查询数据：

db.collection('todos').doc('todo-identifiant-aleatoire').get({
    success(res){
        console.log(res.data)
    }
})

Cloud development computing power

Realization of computing power in traditional mode

Purchase Resources ——> 搭建环境——> Upload Code ——> 部署应用——> Official Release

Implementation of computing power under cloud development

Purchase Resources-> Upload Code-> Deploy Application-> Official Release

Cloud-developed file storage capabilities

	Cloud development	Tradition
File storage system	Cloud service provider takes over	Self maintenance
Network situation	Cloud server provides CDN	Need to configure CDN
API call	Convenience	inconvenient

Cloud development API

Sort by end

• Applet API
• Server API

By type

• Data storage API
• File storage API
• Cloud Function API

使用云开发API必须先初始化：

wx.cloud.init(){
    env:'environment-ID',//云开发环境ID，可在云开发-设置里查看
    traceUser:true//是否在控制台查看用户信息
}

wx.cloud.init(){
    env:{//env可传入一个对象，为不同存储内容指定不同的环境
        	database:'databaseEnv-ID',
        	storage:'storageEnv-ID',
            functions:'functionsEnv-ID'
    }
}

Several permissions for cloud development database

Authority	Applicable scene
Only the creator can write, everyone can read	Articles, comments, public albums
Only the creator can read and write	Private albums, important account information
Writable by management only, readable by everyone	System announcements, system news, merchandise
Only the management side can read and write: the data can only be read and written by the management side	Administrator information, background tasks