试图从猫鼬那里获取收藏列表 [英] Trying to get a list of collections from mongoose

问题描述

我正在尝试使用 mongoose 返回一个 dbs 集合的列表.我正在遵循此处列出的说明，但 http://grokbase.com/t/gg/mongoose-orm/122xxxr7qy/mongoose-get-a-list-of-all-collections.所以这是我的代码

I'm trying to return a list of a dbs collections using mongoose. I'm following the directions set out here but http://grokbase.com/t/gg/mongoose-orm/122xxxr7qy/mongoose-get-a-list-of-all-collections. So here is my code

var mongoose = require('mongoose');
    //if (mongoose.connection.readyState == 0){//checks if already connected to the database
    console.log("creating connection to the database");
    var Config = require('../configs/config');
    var config = new Config();
    config = config.getConfig().db.dev;

    if (mongoose.connection.readyState = 0 ) {
    mongoose.connect("mongodb://austin:[e-mail]:10023/test1");
    console.log('mongoose readyState is ' + mongoose.connection.readyState);
    }
    var collection;

    mongoose.connection.on('open', function (ref) {
        console.log('Connected to mongo server.');
    });

    //trying to get collection names
    mongoose.connection.db.collectionNames(function (err, names) {
        console.log(names); // [{ name: 'dbname.myCollection' }]
        module.exports.Collection = names;
    });

唯一的问题是名称返回未定义.那么是否可以仅使用 vanilla mongoose 返回集合列表?

the only problem is that names returns as undefined. So is it even possible to return a list of collections using just vanilla mongoose?

推荐答案

尝试在连接后运行您的集合名称函数.

Try running your collection names function after connection.

mongoose.connection.on('open', function (ref) {
    console.log('Connected to mongo server.');
    //trying to get collection names
    mongoose.connection.db.listCollections().toArray(function (err, names) {
        console.log(names); // [{ name: 'dbname.myCollection' }]
        module.exports.Collection = names;
    });
})

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