如何使用mongoose从MongoDb获取数据？

本文介绍了如何使用mongoose从MongoDb获取数据？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我刚刚开始学习MongoDB和mongoose。目前我有以下结构：

I just started learning MongoDB and mongoose. Currently I have the following structure:

database -> skeletonDatabase collection -> adminLogin

当我运行 db.adminLogin.find（）从命令行我得到：

When I run db.adminLogin.find() from the command line I get:

{ "_id" : ObjectId("52lhafkjasfadsfea"), "username" : "xxxx", "password" : "xxxx" }

我的连接

module.exports = function(mongoose) { mongoose.connect('mongodb://localhost/skeletonDatabase'); var db = mongoose.connection; db.on('error', console.error.bind(console, 'connection error:')); db.once('open', function callback () { console.log('Conntected To Mongo Database'); }); }

我的-js -

module.exports = function(mongoose) { var Schema = mongoose.Schema; // login schema var adminLogin = new Schema({ username: String, password: String }); var adminLoginModel = mongoose.model('adminLogin', adminLogin); var adminLogin = mongoose.model("adminLogin"); adminLogin.find({}, function(err, data){ console.log(">>>> " + data ); }); }

我的 console.log（）返回为>>>>

那么我在这里做错了什么？为什么我的控制台日志中没有任何数据？提前感谢任何帮助。

So what am I doing wrong here? Why do I not get any data in my console log? Thanks in advance for any help.

推荐答案

mongoose默认情况下会使用单个模型名称，并将它们与以复数形式命名的集合那么，所以mongoose在数据库中查找一个不存在的名为adminLogins的集合。您可以在定义模式时将集合名称指定为第二个参数：

mongoose by default takes singular model names and pairs them with a collection named with the plural of that, so mongoose is looking in the db for a collection called "adminLogins" which doesn't exist. You can specify your collection name as the 2nd argument when defining your schema:

var adminLogin = new Schema({ username: String, password: String }, {collection: 'adminLogin'});