Node.js Mongoose.connection.on(';error';,error=>;)TypeError:无法读取未定义的
在安装了所有需要的NPM包之后,我得到了这种类型的查询 这是我在db文件夹中的索引文件代码 ../db/index.jsNode.js Mongoose.connection.on(';error';,error=>;)TypeError:无法读取未定义的,node.js,mongodb,mongoose,dbconnection,Node.js,Mongodb,Mongoose,Dbconnection,在安装了所有需要的NPM包之后,我得到了这种类型的查询 这是我在db文件夹中的索引文件代码 ../db/index.js 'use strict'; const config = require('../config'); const Mongoose = require('mongoose').connect(config.dbURI); Mongoose.connection.on('error', error => { logger.log('error', 'Mong
'use strict';
const config = require('../config');
const Mongoose = require('mongoose').connect(config.dbURI);
Mongoose.connection.on('error', error => {
logger.log('error', 'Mongoose connection error: ' + error);
});
module.exports = {
Mongoose
}
我已经安装了所有需要的软件包。
&错误是
D:\Node\ChatCAT\ChatCAT_Begin>node server
D:\Node\ChatCAT\ChatCAT_Begin\app\db\index.js:15
Mongoose.connection.on('error', error => {
^
TypeError: Cannot read property 'on' of undefined
at Object.<anonymous> (D:\Node\ChatCAT\ChatCAT_Begin\app\db\index.js:15:21)
at Module._compile (internal/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
at Module.load (internal/modules/cjs/loader.js:1002:32)
at Function.Module._load (internal/modules/cjs/loader.js:901:14)
at Module.require (internal/modules/cjs/loader.js:1044:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object.<anonymous> (D:\Node\ChatCGV9Jm2u7rmsCe65wKzPTw5jtS38n2tVEGi.js:5:12)
at Module._compile (internal/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
at Module.load (internal/modules/cjs/loader.js:1002:32)
at Function.Module._load (internal/modules/cjs/loader.js:901:14)
at Module.require (internal/modules/cjs/loader.js:1044:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object.<anonymous> (D:\Node\ChatCAT\ChatCAT_Begin\app\index.js:11:11)
at Module._compile (internal/modules/cjs/loader.js:1158:30)
D:\Node\ChatCAT\ChatCAT\u Begin>节点服务器
D:\Node\ChatCAT\ChatCAT\u Begin\app\db\index.js:15
Mongoose.connection.on('error',error=>{
^
TypeError:无法读取未定义的属性“on”
在对象上。(D:\Node\ChatCAT\ChatCAT\u Begin\app\db\index.js:15:21)
at模块编译(内部/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js(internal/modules/cjs/loader.js:1178:10)
at Module.load(内部/modules/cjs/loader.js:1002:32)
at Function.Module._load(内部/modules/cjs/loader.js:901:14)
at Module.require(内部/modules/cjs/loader.js:1044:19)
根据需要(内部/modules/cjs/helpers.js:77:18)
对象处。(D:\Node\ChatCGV9Jm2u7rmsCe65wKzPTw5jtS38n2tVEGi.js:5:12)
at模块编译(内部/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js(internal/modules/cjs/loader.js:1178:10)
at Module.load(内部/modules/cjs/loader.js:1002:32)
at Function.Module._load(内部/modules/cjs/loader.js:901:14)
at Module.require(内部/modules/cjs/loader.js:1044:19)
根据需要(内部/modules/cjs/helpers.js:77:18)
在对象上。(D:\Node\ChatCAT\ChatCAT\u Begin\app\index.js:11:11)
at模块编译(内部/modules/cjs/loader.js:1158:30)
这是连接MongoDB的正确方法
const mongoose = require('mongoose');
var options = {
promiseLibrary: require('bluebird'), useNewUrlParser: true, useUnifiedTopology: true
};
var mongodbUri = 'mongodb://127.0.0.1:27017/mydb'
mongoose.connect(mongodbUri, options);
var conn = mongoose.connection;
conn.on('error', console.error.bind(console, 'connection error:'));
检查下面的答案不要粘贴错误的图像,请将其粘贴为纯文本。