如何使用mongoose从MongoDb获取数据？ [英] How to get Data from MongoDb using mongoose?

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'});

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