Mongo：通过ObjectId查找未在流星中定义？

I am using existing Mongodb in meteor project. The existing mongo id represented by ObjectId(). When I try to find by _id, Meteor says ObjectId is not defined

我在流星项目中使用现有的Mongodb。现有的mongo id由ObjectId()表示。当我试图通过_id找到时,Meteor表示没有定义ObjectId

JS:

Names = new Mongo.Collection('name_list', {idGeneration: 'MONGO'});
Names.find({"_id" : ObjectId("5539d9dcf046be5b2302aefc")}) //ReferenceError: ObjectId is not defined

The above JavaScript code is run in server.

上面的JavaScript代码在服务器中运行。

3 个解决方案

#1

You have to use new Mongo.ObjectID("5539d9dcf046be5b2302aefc"). See the meteor docs for some caveats.

您必须使用新的Mongo.ObjectID(“5539d9dcf046be5b2302aefc”)。有关一些警告,请参阅流星文档。

If you want to save having to type new and Mongo. each time, you can define a function:

如果你想节省必须键入新和Mongo。每次,你都可以定义一个函数:

function ObjectId(hexString) { return new Mongo.ObjectID(hexString); };

and then the code you wrote will work.

然后你编写的代码将起作用。

#2

You just need to require the ObjectId function from your mongo.

您只需要从您的mongo中获取ObjectId函数。

ObjectId = require('mongodb').ObjectID;

Then you can use it like that:

然后你就可以这样使用它:

ObjectId("5539d9dcf046be5b2302aefc")

#3

If you are using mongojs:

如果您使用的是mongojs:

db.mycollection.findOne({
    _id: mongojs.ObjectId('your object id')
}, function(err, doc) {
    //do your stuff here.
})

#1