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Mongoose is an Object Data Model (ODM) library for MongoDB and Node. js. It manages relationships between data, provides schema validation, and is used to translate between objects in code and represent objects in MongoDB.
When you try to do something in the software, you get the following message: “DeprecationWarning: Unhandled promise rejections are deprecated in mongoose nodejs“.
Please don’t get too worked up about it. This article will explain how to address these issues with this widely used program.
When Could The Issue “DeprecationWarning: Unhandled promise rejections are deprecated in mongoose nodejs” Appear?
You are currently using nodejs with MongoDB and Mongoose 6.0, and you are encountering the following error.
“(Use `node --trace-warnings ...` to show where the warning was created) (node:13720) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--u terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1) (node:13720) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.”
Two Top Effective Solutions
Try one of the two popular solutions listed below to resolve this issue.
Method 1: Downgrade the Mongoose version
This problem affects Mongoose version 6.0. So all you have to do is downgrade the Mongoose version. Run npm uninstall mongoose to remove the current mongoose version, then npm I [email protected].8. This will install the version that will resolve your issue.
Method 2: Use the Mongoose version 5.13.8
In this approach, you can use these commands.
npm uninstall mongoose npm i [email protected]
Finally, the two methods presented above are simple solutions to the aforementioned severe flaw: “DeprecationWarning: Unhandled promise rejections are deprecated in mongoose nodejs“.
Also, if you have any additional suggestions, please leave them in the comments section. Today, we wish everyone the best of luck with the Mongoose program.