1 const mongoose=require('mongoose')
2
3 mongoose.connect("mongodb://localhost/playground",{ useNewUrlParser: true,useUnifiedTopology: true})
4 .then(()=>{console.log("数据库连接成功")})
5 .catch(err=>{console.log(err,'数据库失败')})
6 const postSchema=new mongoose.Schema({
7 title:{
8 type:String,
9 //必选字段
10 required:[true,'请输入字符串'],
11 //最小长度与最大长度
12 minlength:3,
13 maxlength:11,
14 //去除字符串两边空格
15 trim:true
16 },
17 age:{
18 type:Number,
19 //数字的最小范围和最大范围
20 min:18,
21 max:100
22 },
23 publishDate:{
24 type:Date,
25 //默认值
26 default:Date.now
27 },
28 category:{
29 type:String,
30 //列举出当前字段可以拥有哪些值
31 enum:['java','node.js','javascript','zg']
32 },
33 author:{
34 type:String,
35 //自定义验证
36 validate:{
37 //v是用户输入的值
38 validator:v=>{
39 //true为验证通过，false为验证失败
40 return v&&v.length>5
41 },
42 //自定义错误信息
43 message:'传入的值不符合验证规则'
44
45 }
46 }
47 });
48 const Post=mongoose.model("Post",postSchema);
49 Post.create({title:"zhanggong",age:20,category:"java",author:"rrrr"}).then(res=>{console.log(res)})
