我对 Node.js 比较陌生。尝试使用 mocha 框架和 mongodb 驱动程序测试与 mongodb 的连接。
Node.js 版本 - 6.11.3
Mongodb 驱动程序版本 - 2.2.31
Mondodb 版本 - 3.4.7
这是我的 js 文件:
var should = require("should");
var expect = require('chai').expect;
var cfg = require('../config');
var uri = cfg.mongouri;
var MongoClient = require('mongodb').MongoClient, Logger =
require('mongodb').Logger;
Logger.setLevel('debug');
describe("mongoconnection", function () {
describe("fetch data", function () {
it("should fetch data from db", function (done) {
MongoClient.connect(uri,function(err, db) {
if (err) {
throw err;
} else {
console.log("successfully connected to the database");
}
db.close();
});
done();
});
});
});
但是这部分代码
function(err, db) {
if (err) {
throw err;
} else {
console.log("successfully connected to the database");
}
db.close();
}
永远不会被执行,我无法建立连接,例如我既没有收到控制台日志,也没有收到异常。
调试信息:
[DEBUG-Connection:9352] 1506430786041 creating connection 0 with options [{"host":HOST,"port":PORT,"size":5,"keepAlive":true,"keepAliveInitialDelay":300000,"noDelay":true,"connectionTimeout":30000,"socketTimeout":360000,"ssl":true,"ca":null,"crl":null,"cert":null,"rejectUnauthorized":false,"promoteLongs":true,"promoteValues":true,"promoteBuffers":false,"checkServerIdentity":true}] { type: 'debug', message: 'creating connection 0 with options [{"host":HOST,"port":PORT,"size":5,"keepAlive":true,"keepAliveInitialDelay":300000,"noDelay":true,"connectionTimeout":30000,"socketTimeout":360000,"ssl":true,"ca":null,"crl":null,"cert":null,"rejectUnauthorized":false,"promoteLongs":true,"promoteValues":true,"promoteBuffers":false,"checkServerIdentity":true}]', className: 'Connection', pid: 9352, date: 1506430786041 }
还已经检查了连接字符串是否正确,并且我可以通过另一个应用程序建立与它的连接(在 SoapUI 中执行的 groovy 脚本)。
我现在陷入困境,有人可以帮我解决这个问题吗,先谢谢了。
最佳答案
您正在 MongoClient.connect
的异步回调之外从 Mocha 调用 done()
。因此 done()
在它甚至可以连接到数据库之前被调用。
将代码更改为:
it("should fetch data from db", function (done) {
MongoClient.connect(uri,function(err, db) {
if (err) {
throw err;
} else {
console.log("successfully connected to the database");
}
db.close();
done();
});
});
关于node.js - MongoClient.connect不执行回调函数,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46427457/