Getting metadata from plugin failed with error: key must be a string, a buffer or an object

Getting metadata from plugin failed with error: key must be a string, a buffer or an object

If you are encountering the error message “Getting metadata from plugin failed with error: key must be a string, a buffer or an object” while working with TypeScript, don’t worry, you’re not alone. This error typically occurs when you are trying to access metadata from a plugin but the key you are using is not of the correct type.

Fortunately, there are a few solutions to this problem. Let’s explore them one by one:

Solution 1: Check the Key Type

The first step is to ensure that the key you are using to access the metadata is of the correct type. The error message clearly states that the key must be a string, a buffer, or an object. Double-check your code and make sure that you are passing a valid key.

Here’s an example of how to correctly access metadata using a string key:

const metadata = Reflect.getMetadata('key', target);

Solution 2: Verify Plugin Compatibility

If you are using a plugin that provides metadata functionality, it’s important to ensure that the plugin is compatible with your TypeScript version. In some cases, outdated or incompatible plugins can cause this error.

Check the documentation of the plugin you are using and verify its compatibility with your TypeScript version. If necessary, update the plugin or look for an alternative that is compatible with your setup.

Solution 3: Update TypeScript

In some cases, this error can be caused by a bug or an issue in the TypeScript compiler itself. Updating TypeScript to the latest version can often resolve such problems.

Make sure you have the latest version of TypeScript installed by running the following command:

npm install typescript@latest --save-dev

After updating TypeScript, rebuild your project and check if the error persists.

These are the common solutions to fix the “Getting metadata from plugin failed with error: key must be a string, a buffer or an object” error in TypeScript. By following these steps, you should be able to resolve the issue and continue working on your project without any interruptions.

Remember to always double-check your code, verify plugin compatibility, and keep your TypeScript version up to date to avoid such errors in the future.

Happy coding!