试图从mongoose获取集合列表

Question

我正在尝试使用mongoose返回dbs集合的列表.我按照此处列出的指示,但http://grokbase.com/t/gg/mongoose-orm/122xxxr7qy/mongoose-get-a-list-of-all-collections.所以这是我的代码

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:password1@paulo.mongohq.com: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.那么甚至可以使用香草猫鼬返回集合列表吗？

Answer 1

刚刚看到这个答案,虽然它可能已经工作,但它似乎collectionNames已从可用的功能名称中删除而有利于listCollections

这个其他堆栈溢出帖子有一个工作示例:https://stackoverflow.com/a/29461274/4127352

以下是原始文档的链接:http: //mongodb.github.io/node-mongodb-native/2.0/meta/changes-from-1.0/

Answer 2

连接后尝试运行您的集合名称功能。

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;
    });
})

Answer 3

这是我如何设法获取连接的数据库上的所有名称。

var mongoose = require('mongoose');
var collections = mongoose.connections[0].collections;
var names = [];

Object.keys(collections).forEach(function(k) {
    names.push(k);
});

console.log(names);

此解决方案适用于mongoose 4.4.19。