Error code
// 1. 引入mongoose模块
const mongoose = require('mongoose');
// 2.创建文章集合规则
const articleSchema = new mongoose.Schema({
title: {
type: String,
maxlength: 20,
minlength: 4,
required: [true, '请填写文章标题 ']
},
author: {
type: mongoose.Schema.Types.ObjectId,
ref: 'User',
required: [true, '请传递作者']
},
publishDate: {
type: Date,
default: Date.now
},
cover: {
type: String,
default: null
},
content: {
type: String
}
})
// 3.根据规则创建集合
const Article = mongoose.model('Article')
// 4. 将集合规则做为模块成员进行导出
module.exports = {
Article
}
Reason for error
At the beginning, only the collection rule was created, but it was not used when creating the collection.
So because mongoose.model() lacks the second parameter, it causes an error.
Solution
Add the second parameter of mongoose.model()
Modified code
// 1. 引入mongoose模块
const mongoose = require('mongoose');
// 2.创建文章集合规则
const articleSchema = new mongoose.Schema({
title: {
type: String,
maxlength: 20,
minlength: 4,
required: [true, '请填写文章标题 ']
},
author: {
type: mongoose.Schema.Types.ObjectId,
ref: 'User',
required: [true, '请传递作者']
},
publishDate: {
type: Date,
default: Date.now
},
cover: {
type: String,
default: null
},
content: {
type: String
}
})
// 3.根据规则创建集合
const Article = mongoose.model('Article', articleSchema)
// 4. 将集合规则做为模块成员进行导出
module.exports = {
Article
}
Self-motivation
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