Question

I’m trying to fix some problems with a Magento site, but I’m running into lots of problems . . .

I’ve located a folder in Magento with the path:

“/app/code/core/Mage/Catalog/Model/Resource”

In the default install of Magento it has a file structure like so:

 - category
 - collection
 - eav
 - helper
 - layer
 - product
 - more php files

However the dump of the current site I’ve received didn’t have any of those folders or files except the “Eav” folder, the site was throwing errors so I added the other folders in (which seemed to fix it) unfortunately I think this may have caused other problems.

My question is, are all of those folders absolutely necessary for Magento to work? Or are there situations in which you might remove all of those folder/files except the “Eav” folder?

Answer 1

There was a general ORM rework which occurred in CE1.6. Along with the introduction of DB-specific helpers and the completion of the Varien DDL components, the resource models were generally moved to a standard location for all modules. In the case of Mage_Catalog the resource models were moved from Mage/Catalog/Resource/Eav/Mysql4/ to Mage/Catalog/Model/Resource/ and the resource model class group was changed from catalog_resource_eav_mysql4 to catalog_resource.

As noted in comments above, it is best to compare apples to apples, meaning to verify the version number in the Mage class and comparing the core files to a known-good copy.