Error: Trying to open unclosed connection.
错误:试图打开未关闭的连接。在我自己写model文件的时候,重复打开了连接数据库的操作,所以报这种错误。
错误实例:
两个model文件:
userModel.js
var mongoose = require('mongoose');
var config = require('./../config/config');
mongoose.connect(config.mongodb);
var PostSchema = new mongoose.Schema({
title:String,//标题
author:String,//作者
article:String,//文章内容
publishTime:String,//发表时间
postImg:String,//封面
comments:[{
name:String,
time:String,
content:String
}],//评论
pv:Number//访问次数
});
module.exports = mongoose.model('Post',PostSchema );
userModel.js
var mongoose = require('mongoose');
var config = require('../cofig/config');//引用同级目录下的文件
mongoose.connect(config.mongodb);
var UserSchema = new mongoose.Schema({
username:String,
password:String,
email:String
}); module.exports = mongoose.model('User', UserSchema);
我们应该在我们运行我们的项目的时候打开数据库的连接,之后再每个model文件直接访问就可以,不要每一次都要进行连接。修正后的代码:
在我们项目的app.js或index.js(就是所谓的启动文件)增加共有的数据库连接
var mongoose = require('mongoose');
var dbName = 'blog'; //数据库的名称
var url = 'mongodb://localhost/'+dbName;
var mongoOptions = {
server: {
socketOptions: {
keepAlive: 1
}
}
};
mongoose.connect(url, mongoOptions);
mongoose.connection.on('error', function (err) {
console.log('Mongo Error:' + err);
}).on('open', function () {
console.log('Connection opened');
});
之后再每个model进行引用:
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var UserSchema = new Schema({
username:String,
password:String,
email:String
}); module.exports = mongoose.model('User', UserSchema);
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