const mongoose = require('mongoose'); mongoose.connect('mongodb://localhost/playground', { useUnifiedTopology: true }).then(() => console.log('數據庫連接成功')).catch(err => console.log(err, '數據庫連接失敗'))//創建集合規則 const postSchema = new mongoose.Schema({title: {type: String,require: [true, '請傳入文章標題'],minlength: [2, '輸入長度不能小于2'],maxlength: [5, '輸入長度不能大于5'],const mongoose = require('mongoose'); mongoose.connect('mongodb://localhost/playground', { useUnifiedTopology: true }).then(() => console.log('數據庫連接成功')).catch(err => console.log(err, '數據庫連接失敗'))//創建集合規則 const postSchema = new mongoose.Schema({title: {type: String,require: [true, '請傳入文章標題'],minlength: [2, '輸入長度不能小于2'],maxlength: [5, '輸入長度不能大于5'],//不允許有空格trim: true},age: {type: Number,//數字得最小范圍min: 18,//數字得最大范圍max: 100},publishDate: {type: Date,default: Date.now},category: {type: String,enum: {values: ['html', 'css', 'javascript'],message: '傳入得不符合規則'},},author: {type: String,validate: {validator: v => {//true 驗證成功//false驗證失敗v.length>4return v && v.length > 4},//自定義錯誤信息message: '傳入得值不符合規則'}} }); const Post = mongoose.model('Post', postSchema); //插入數據 Post.create({ title: 'aa', age: 60, category: 'java', author: '125' }).then(result => console.log(result)).catch(error => {//獲取錯誤信息對象const err = error.errors;//循環錯誤對象for (var attr in err) {console.log(err[attr]['message'])}});//不允許有空格trim: true},age: {type: Number,//數字得最小范圍min: 18,//數字得最大范圍max: 100},publishDate: {type: Date,default: Date.now},category: {type: String,enum: ['html', 'css', 'javascript']},author: {type: String,validate: {validator: v => {//true 驗證成功//false驗證失敗v.length>4return v && v.length > 4},//自定義錯誤信息message: '傳入得值不符合規則'}} }); const Post = mongoose.model('Post', postSchema); //插入數據 Post.create({ title: 'aa', age: 60, category: 'java', author: '125' }).then(result => console.log(result)).catch(err => {//獲取錯誤信息對象const err = err.errors;//循環錯誤對象for (var attr in arr) {console.log(err[attr]['message'])}});

運行結果

總結

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