Troubleshooting Magento Extension Install Script Errors

Despite creating an install script for your Magento extension, you encounter an issue where it fails to execute, despite appearing in the core_resource table. To resolve this issue, consider the following:

Review Setup Resource Configuration

Ensure that your setup resources in config.xml are correctly configured under the global -> resources path. Verify that the connection element uses core_setup as its connection value.

Version Number Mismatch

Check that the version number specified in your MySQL installation script (e.g., mysql4-install-0.0.1.php) aligns with the version number declared in your module's config.xml. These values should match for the install script to execute.

Debugging Resource File Execution

To identify the specific file that Magento is attempting to run, add temporary exceptions to the following methods in app/code/core/Mage/Core/Model/Resource/Setup.php:

1. _modifyResourceDb: Add exceptions to handle missing SQL file directories and empty file arrays.
2. _getModifySqlFiles: Add exceptions to identify the lack of valid upgrade files.

By inspecting the exception messages upon page reload, you can determine which installation script Magento is attempting to run, but not finding.

Module Row Deletion

Remember to remove your module's row from core_resource and clear your cache to force Magento to reprocess installation resources.

Further Troubleshooting

If the above steps do not resolve the issue, investigate the logic of the applyAllDataUpdates method in Mage/Core/Model/Resource/Setup.php to understand why your installer file is not being included.