86.《mongodb自定义验证规则》

 
 
const  mongoose = require("mongoose");
 
// 连接数据库
mongoose.connect("mongodb://localhost/play",{useNewUrlParser:true})
.then(res=>{
    console.log("连接成功");
}).catch(err=>{
    console.log("连接失败");
})
 
// 创建规则
const schema = new mongoose.Schema({
    name:{
        type:String,
        minlength:2,
        maxlength:5
    },
    age:{
        type:Number,
        min:15,
        max:20
    },
    publishDate:{
        type:Date,
        default:Date.now
    },
    category:{
        type:String,
        enum:['html','css','javascript','node.js']
    },
    // 自定义验证规则
    author:{
        type:String,
        // 自定义验证规则
        validate:{
            validator: v => {
                return v && v.length > 4
            },
            message:"莫传入的值不符合验证规则"
        }
    }
})
// 通过规则创建集合
const realyData = mongoose.model("user",schema)
 
// 往集合里插入文档
realyData.create({name:"占山",age:16,category:"javascript",author:"aaaaaaa"},(err,res)=>{
    console.log(err);
    console.log(res);
})