MongoDB 4.2 support in MongoDB Node.js 3.3.0 driver

MongoDB
August 21, 2019

The MongoDB Node.js team released version 3.3.0 of their driver, with the highlight being version 4.2 server support. That means the driver can handle distributed transactions, On-Demand Materialized Views, Wildcard Indexes, retryable reads and supports the other enhancements made to the MongoDB Query Language including pipeline enabled updates.

Also included in the 3.3.0 driver is the enhanced SRV polling mechanism for sharded clusters. This feature allows applications that connect to a sharded cluster using SRV records to automatically update their knowledge of the clusters topology while running, rather than only on startup.

Internally, what was a two part driver - a low-level mongodb-core and a high-level node-mongodb-native - have now been merged with mongodb-core absorbed by node-mongodb-native. This merger should help speed up the development process of delivering the latest in MongoDB Node.js support.

You can find out more about the MongoDB Node.js driver 3.3.0, including a full list of new features and fixes in the release notes. Documentation for 3.3 covers how to use the driver and a full 3.3 API reference is also available. The package itself is available on npm.

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Going in MongoDB 4.2

There's a lot going into MongoDB 4.2, like on-demand materialized views, pipeline powered updates and distributed transactions. And as we cleared the way for those new features, so we moved on and various commands and options that were previously deprecated are now completely removed. Find out what here.

August 21, 2019
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MongoDB Releases “Focus Mode” in Compass GUI

We’re excited to announce an improvement to the aggregation-building experience in MongoDB Compass. Compass already makes it easy to view and manage your MongoDB databases, and with the addition of Focus Mode you now have the option to dial in on specific stages within your aggregation pipeline. Overview MongoDB's Query API and Aggregation Pipelines enable easy retrieval and processing of data from collections. They also facilitate complex operations such as filtering, grouping, and transforming, making computation and analysis effortless. MongoDB Compass' intuitive interface simplifies the process of building aggregations by enabling developers to easily create, test, and refine aggregation pipelines, and the introduction of Focus Mode takes this a step further. When constructing pipelines, having to simultaneously view and consider multiple stages can make it challenging to analyze the impact of a specific stage, leading to increased cognitive load. Now, developers can toggle Focus Mode on stages, opening a view that focuses exclusively on the contents of the specific stage they are working on. This view can also be used to view sample input (before the aggregation stage is applied) and output (after the stage is applied) documents, aiding in the understanding, troubleshooting, and optimizing of the data pipeline. Developers can also switch between different stages by accessing a drop-down menu at the top of their screen. This makes identifying inefficiencies and optimizing performance easier, as well as providing deeper insights from the output documents for data-driven decision making. Focus Mode offers a streamlined and distraction-free environment for working with stages, improving the efficiency and precision of testing, debugging, and analyzing the impact of each stage on the data, ultimately simplifying the creation and management of pipelines. Conclusion The addition of Focus Mode is part of our continued refresh of the query and aggregation experience in Compass. These improvements are made possible thanks to the feedback of our developer community, so we encourage you to try out this new feature and let us know what you think! To learn more about Aggregation Pipeline Builder in Compass, visit our documentation .

March 21, 2023