未定义猫鼬模型
[英]Mongoose Model is not defined
问题描述
Linking my app to database utilizing mongoose I constantly get an error: 
使用猫鼬将我的应用程序链接到数据库时，不断出现错误：
app.js (server): app.js（服务器）：
const express = require('express');
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/nodedb', { useNewUrlParser: true });
let db = mongoose.connection;
db.once('open', () => console.log('connected to MongoDB'));
db.on('error', (err) => console.log(err));
const app = express();
let Article = require('./models/article');
const path = require('path');
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');
//create routes
app.get('/', (req, res) => {
Acticle.find({}, (err, articles) => {
if (err) {
console.log(err)
} else {
res.render('index', {
title: 'Some articles',
articles: articles
});
}
});
});
//start server at the port
app.listen(3000, () => console.log('server is up and listening at the port 3000'));
In the file above I connect to the db, and the connection is successful. 在上面的文件中，我连接到数据库，连接成功。
In app.js I reference my model file (article.js): 在app.js中，我引用了我的模型文件（article.js）：
//bring in mongoose
const mongoose = require('mongoose');
//create an article schema
let articleSchema = mongoose.Schema({
title: {
type: String,
required: true
},
author: {
type: String,
required: true
},
body: {
type: String,
required: true
}
});
let Article = mongoose.model('Article', articleSchema);
module.exports = Article;
and when I try to access the '/' route, I get an error of 当我尝试访问“ /”路由时，出现错误
ReferenceError: Acticle is not defined at app.get (/media/domanski/Domanski/1_Tel Ran/webinars_2018/20181014/nodebase_mongo/app.js:43:5) at Layer.handle [as handle_request] (/media/domanski/Domanski/1_Tel Ran/webinars_2018/20181014/nodebase_mongo/node_modules/express/lib/router/layer.js:95:5) at next (/media/domanski/Domanski/1_Tel Ran/webinars_2018/20181014/nodebase_mongo/node_modules/express/lib/router/route.js:137:13) at Route.dispatch (/media/domanski/Domanski/1_Tel Ran/webinars_2018/20181014/nodebase_mongo/node_modules/express/lib/router/route.js:112:3) at Layer.handle [as handle_request] (/media/domanski/Domanski/1_Tel Ran/webinars_2018/20181014/nodebase_mongo/node_modules/express/lib/router/layer.js:95:5) at /media/domanski/Domanski/1_Tel Ran/webinars_2018/20181014/nodebase_mongo/node_modules/express/lib/router/index.js:281:22 at Function.process_params (/media/domanski/Domanski/1_Tel Ran/webinars_2018/20181014/nodebase_mongo/node_modules/express/lib/router/index.js:335:12) at n
Does anyone has an Idea what do I do wrong? 有人知道我该怎么做吗？
2 个解决方案
解决方案1
0 2018-10-14 07:20:03
You have spelling mistake. 您有拼写错误。
Acticle.find({}, (err, articles) => {});
Should be 应该
Article.find({}, (err, articles) => {});
解决方案2
0 已采纳 2018-10-14 08:45:02
Two issues there, 那里有两个问题，
- Typo in app.js app.js中的错字
Acticle.find() should be Article.find()
In article.js(model), you should use the new keyword to define a new schema.
在article.js（model）中，应该使用new关键字定义新的架构。 let articleSchema = mongoose.Schema({});
让articleSchema = mongoose.Schema（{}）;
should be replaced with 应该替换为
let articleSchema = new mongoose.Schema({
// your schema
});
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