流星远程收集-钩子不起作用

Question

I have to connect to the external database and get access to its collections. It works fine, when I use it, but the problem is when I need collection hooks, eg Collection.after.insert(function(userId, doc)). The hook is not being fired. I have following code:

// TestCollection.js

let database = new MongoInternals.RemoteCollectionDriver("mongodb://127.0.0.1:3001/meteor",
{
    oplogUrl: 'mongodb://127.0.0.1:3001/local'
});
let TestCollection = new Mongo.Collection("testCollection", { _driver: database });
module.exports.TestCollection = TestCollection;
console.log(TestCollection.findOne({name: 'testItem'})); // writes out the item correctly

// FileUsingCollection.js
import { TestCollection } from '../collections/TestCollection.js';
console.log(TestCollection.findOne({name: 'testItem'})); // writes out the item correctly second time

TestCollection.after.update(function (userId, doc) {
  console.log('after update');
}); // this is NOT being fired when I change the content of remote collection (in external app, which database I am connected)

How to make this work?

EDIT:

I have read many hours about it and I think it might be connected with things like: - oplog - replicaSet

But I am newbie to Meteor and can't find out what are those things about. I have set MONGO_OPLOG_URL and I added oplog parameter to database driver as I read here: https://medium.com/@lionkeng/2-ways-to-share-data-between-2-different-meteor-apps-7b27f18b5de9 but nothing changed. And I don't know how to use this replicaSet, how to add it to the url. Anybody can help?

Answer 1

You can also try something like below code,

    var observer = YourCollections.find({}).observeChanges({
            added: function (id, fields) {

             }
        });

You can also have 'addedBefore(id, fields, before)' , 'changed(id, fields)' , 'movedBefore(id, before)' , 'removed(id)'

For more features goto link .