Magento - Mage::getModel not working on Linux server

Question

I'm struggling with an issue for which I can't find an explanation. I have two development environments that I use for my projects. I created a simple module for Magento and I tested it on one environment. After overcoming all Magento's complications, the module works as expected. This is on XAMPP.

I then copied the module to the development Linux environment, on a hosted server, and it crashes miserably. I did some debugging, and I found out that a call to Mage::getModel() returns bool(false) instead of the instance of the Model I requested.

I double checked all files and directories, and they match. Database is not involved (not from my side, at least, I don't need tables) and both environments have only me as a User, with Admin permissions.

Any suggestion on where should I start looking is welcome, thanks.

Added on 2012/07/09
Model contains a class named Diego_ClientCustomModule_Model_ExternalUserData, which is invoked with $model = Mage::getModel('clientcustommodule/externaluserdata');. Model file resides in Diego_ClientCustomModule\code\local\Diego\ClientCustomModule\Model\. The curious thing is:

• If model file is named Externaluserdata.php, it works.
• If model file is named ExternalUserData.php (i.e. it matches the class name), it doesn't work.

I'm aware of case sensitivity stuff etc, but, if the alias is all lower-case, how comes it can load a file having the first letter capitalized?

Configuration file 0.1.0 Diego_ClientCustomModule_Helper Diego_ClientCustomModule_Model Diego_ClientCustomModule_Block standard Diego_ClientCustomModule ClientCustomModule

Answer 1

Snarking about the framework for which you are asking for help may not be the best strategy for receiving help.

Your issue is likely one of cache (remove var/cache folder to check) or one of improper casing. Note that the first letter of each directory and filename for files loaded by the autoloader (blocks, models, and helpers).