DBRefs support in Mongodb java driver 4.0 - mongodb

It is found that Database References can be achieved on MongoDB Java driver version 4.0 Here is the link below
https://docs.mongodb.com/manual/reference/database-references/
But I couldn't find a relevant tutorial or guide which achieves the same for version 4.0. I am a newbie to the Mongo world. Can anyone figure out what am I missing here?

Related

Integrating Solr 8.9.0 and MongoDB 5.0 Community Edition

I'm running Solr 8.9.0 and Java 14.0.1 on Linux, and I'm trying to integrate Solr and MongoDB 5.0 Community Edition. I have MongoDB running and loaded with data, and I've installed the mongo-connector.
I'm really struggling with what to do next. All of the documentation that I've found (see a few examples below) is several years old, inconsistent, incomplete and simply doesn't work.
Can anyone please share some documentation / advice on how to integrate Solr and MongoDB?
Thank you.
Muhammad
https://blog.toadworld.com/2017/02/03/indexing-mongodb-data-in-apache-solr
https://hub.packtpub.com/apache-solr-and-big-data-integration-mongodb/
https://github.com/yougov/mongo-connector/wiki/Usage%20with%20Solr
https://chemifinder.wordpress.com/2015/08/19/integrating-mongodb-and-solr-part-3-integrating-mongodb-and-solr/

How to connect zend - laminas with MongoDB

I am new to Zendlaminas and MongoDB.I know PHP. I want to connect the laminas with MongoDB. I do no from which file i need to start to config.For the whole day i am stuck here. Can anyone guide here.
I have installed Zend Laminas
Using a Apache2 server
Installed MongoDB as well
OS : Ubuntu
Well, there's this. I think there's a php-mongodb package for Ubuntu that will install PHP's MongoDb extension.
It might be overkill for your needs, but I suggest using Doctrine ORM with MongoDB. There's a bit of a learning curve (ORMs in general are complex) but I find it a nice clean way to develop once it's set up.

migrating parse-server / mlab deployment to MongoDB Atlas

I originally posted this question on ServerFault, but it didn't get any traction, so I thought that stack might be a better forum for this question. My apologies if this out of line.
We are currently running parse-server (v2.7.2) on Heroku (node.js 7.10.1), connected to an mLab mongodb database. I recently received a notification
from mLab that they have been acquired by MongoDB and will be eventually migrating all customers to MongoDB Atlas.
The migration instructions from mLab to Atlas seem fairly self explanatory. My question concerns parse-server itself:
Does our version of parse-server (2.7.2) and node.js (7.10.1) have drivers that will support Atlas MongoDB?
MongoDB feature compatibility will depend on the underlying driver version which you can find by running npm list mongodb in the directory where you installed parse-server.
You can also check the mongodb driver version requested in parse-server's package.json, but a newer driver version may be installed depending on the semver notation used.
It looks like parse-server 2.7.2 uses the mongodb 3.0.1 driver, which is fully compatible with MongoDB 3.4 and 3.6 features according to the MongoDB Driver Compatibility documentation.
The MongoDB Node 3.0.x driver won't support newer features of MongoDB 4.0 (for example, transactions), but you should otherwise be fine with an Atlas deployment using MongoDB 3.4 or newer.

C# client lib for Mongodb: Will it run against Mongodb 3.x?

We have an app that uses the C# Mongodb client lib from mongo, version 1.1.0.4184
This code currently runs against mongodb 2.6.4
We would like to stand up a new mongodb server, the current version (3.2.11). Will our code run against newer mongodb?
It really depends what you mean by "will it run". The MongoDB v1.1.0.4184 C# driver was released in June, 2011 and dates to roughly the MongoDB 1.8 server release timeframe. This driver version is certainly no longer tested or supported, and will not be fully compatible with newer server features like the WiredTiger storage engine (default in MongoDB 3.2+) or SCRAM-SHA-1 authentication (default in MongoDB 3.0+).
The MongoDB documentation includes a reference table with recommended version(s) of the drivers for use with a specific version of MongoDB: C#/.NET Driver Compatibility.
If this is a production system I would strongly recommend taking the time to update and test a supported version of the C# driver for use with MongoDB 3.2 (eg. the v1.11 C# driver). I suspect it is very likely you will encounter fixed (or novel) bugs/behaviour using a driver that is more than five years old. Your application won't be able to take advantage of many of the newer server features, and this obsolete driver predates specifications such as standard Server Discovery and Monitoring (SDAM) behaviour.
That said, assuming you aren't using any features the driver isn't aware of your code may continue to run (or at least appear to run) successfully. In my opinion doing so is a high risk deployment strategy.
Yes, i am using it, but however we have to chek on specific features, which you were using. using MongoDB latest driver is much better in terms of latest features and there are few features were removed(like 'eval()').

Meteor mongodb version

On starting meteor 1.4.1, I get this message:
Your development database is using mmapv1, the old, pre-MongoDB 3.0 database
engine. You should consider upgrading to Wired Tiger, the new engine. The
easiest way to do so in development is to run meteor reset. If you'd like to
migrate your database, please consult
https://docs.mongodb.org/v3.0/release-notes/3.0-upgrade/
I though Meteor looks after the mongodb side of things under the hood and I would need to fix it if it is not broken, Will it be a problem if left as is or should be better to upgrade, and how to go about it? Thanks
You can check it in here.
https://guide.meteor.com/1.4-migration.html#update-to-mongo-3_2
MDG recommended you to update. minimum version supported by metetor1.4 is Mongodb Version 2.6.