//插入数据库模块
const mongoose = require('mongoose');
//连接数据库
mongoose.connect('mongodb://localhost/playground', { useNewUrlParse: true })
.then(result => {
console.log('数据库连接成功');
})
.catch(err => {
console.log(err, '数据库连接失败');
})
//创建集合规则
const postSchema = new mongoose.Schema({
title: {
type: String,
required: [true, '请传入标题'],
minlength: [2, '文章长度不能小于2'],
maxlength: [5, '文章长度不能超过5']
},
age: {
type: Number,
min: 18,
max: 100
},
publishDate: {
type: Date,
default: Date.now
},
category: {
type: String,
/* enum: {
['html', 'java', 'css', 'javascript']
} */
enum: {
values: ['html', 'java', 'css', 'javascript'],
message: '分类名称要在一定的范围内才可以'
}
},
author: {
type: String,
validate: {
validator: v => {
//返回布尔值
//true验证成功
//false验证失败
//v要验证的值
return v && v.length > 2
},
//自定义错误信息
message: '传入的值不符合验证规则'
}
}
});
//根据条件创建集合
const Post = mongoose.model('Post', postSchema);
Post.create({ title: 'aa', age: 30, category: 'jav1', author: 'a' })
.then(result => console.log(result))
.catch(error => {
const err = error.errors;
for (var attr in err) {
//将错误信息打印到控制台中
console.log(err[attr]['message']);
}
});
