If you’ve recently upgraded your Magento installation to version 2.4.0 and encountered the error message “Class Magento\Framework\Search\Adapter\Mysql\Mapper does not exist,” you’re not alone. This error can occur during the process of setting the production mode and can be quite frustrating. But fear not, as we’re here to help you troubleshoot and resolve this issue.
Understanding the Error
The error message suggests that the class Magento\Framework\Search\Adapter\Mysql\Mapper is missing, causing the compilation process to fail. In Magento 2.4, certain deprecated classes, including this one, were removed. The error is typically triggered when a third-party module or custom code attempts to use the deprecated class.
Solution: Identifying the Cause
To resolve this error, you’ll need to identify which part of your code or which third-party module is causing the issue. Follow these steps to track down the source of the error:
- Log in to your Magento admin panel.
- Navigate to Stores > Configuration.
- Expand the Advanced section and select Developer.
- Open the Enable Developer Mode dropdown and select Yes.
- Save the configuration changes.
Enabling developer mode allows you to see more detailed error messages, which will help pinpoint the specific location in your code where the deprecated class is being used.
Solution: Finding Overrides
Once you’ve enabled developer mode, you’ll need to locate any code overrides that reference the deprecated class. Follow these steps:
- Access your Magento root directory via SSH or FTP.
- Execute the following command:
code
find -type f -iname '*.php' -print0 | xargs -0 grep -nw -e 'Magento\\Framework\\Search\\Adapter\\Mysql\\Mapper'
This command will search for any occurrences of the deprecated class in your PHP files. The output will show you the specific files and lines where the class is referenced.
Solution: Removing Overrides
After identifying the overrides, you have two options:
- Disable Overrides: If the overrides are part of your custom code, you can modify the affected files and remove the reference to the deprecated class. Replace it with the appropriate class or functionality that is compatible with Magento 2.4.
- Remove Third-Party Modules: If the overrides are coming from third-party modules, you may need to reach out to the module developers or consult their documentation for an updated version that is compatible with Magento 2.4. If no compatible version is available, consider removing the module or finding an alternative solution.
Solution: Clear Cache and Recompile
Once you’ve made the necessary changes to remove the references to the deprecated class, it’s important to clear the cache and recompile your code. This ensures that the changes take effect and that the error is resolved.
- Log in to your Magento root directory via SSH or FTP.
- Execute the following commands:
code
php bin/magento cache:clean
php bin/magento cache:flush
php bin/magento setup:di:compile
Clearing the cache and recompiling your code will ensure that any cached data or compiled classes referencing the deprecated class are updated.
Conclusion
Resolving the “Magento 2.4 Class Magento\Framework\Search\Adapter\Mysql\Mapper does not exist” error requires identifying and removing references to the deprecated class. By following the steps outlined in this guide, you’ll be able to track down the source of the error, modify or remove the overrides, and clear the cache to ensure the changes take effect.
Remember to always keep your third-party modules up to date and consult their documentation for compatibility with the Magento version you’re using. With a little bit of troubleshooting and code adjustment, you’ll have your Magento 2.4 installation up and running smoothly in no time.
