NodeJS + Mongo-如何获取集合的内容? [英] NodeJS + Mongo - how to get the contents of collection?

问题描述

我正在用mongo编写一个简单的NodeJS应用程序.要连接到mongo，我使用:

I'm writing a simple NodeJS app with mongo. For connecting to mongo I use:

var mongo = require('mongodb'),
Server = mongo.Server,
Db = mongo.Db,
ObjectID = require('mongodb').ObjectID;
db.open(function(err,db) {...};

因此，我有数据库"docs"，并且创建了一个名为"companies"的集合.现在，它具有4个对象(记录).我想以数组的形式获取此集合的全部内容，并逐行显示它们:

So, I have database "docs", and I've created a collection called "companies". Now it has 4 objects (records) in it. I want to get the full contents of this collection as an array and show them line-by-line:

//get companies list
app.get('/companies',function(req,res){
db.collection("companies",function(err,collection){
    collection.find({},function(err, companies) {
        companies.forEach(function(err,company){
                console.log (company);
            }
        );
    });
});
});

但是，Node向我返回了这样的错误:

However, Node returns me such error:

TypeError: Object #<Cursor> has no method 'forEach'

有什么想法吗?预先感谢.

Any ideas? Thanks in advance.

推荐答案

传递到find回调中的companies参数是

The companies parameter that's passed into your find callback is a Cursor object, not an array. Call toArray on it to convert the query results to an array of objects, or each to process the results one at a time.

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