As far as I know (/knew), the following 2 snippets were pretty much equivalent:

$collection = Mage::getResourceModel("reports/product_collection")


$collection = Mage::getModel("reports/resource_product_collection")

They both result in an instance of same class (Mage_Reports_Model_Resource_Product_Collection).

The problem comes when I try to rewrite the class. Here is how I did this:


This is where the difference appears, the first one isn't rewritten, while the second one is.

My questions are:

  • Is this the intended behavior ? Why ?
  • What is the difference between the 2 initial snippets ?

Note: This happens on Magento

1 Answer 1


Your xml should look like this:

  • +1, works perfectly this way. I do have one question however, why does my code still work in one circumstance, but not the other ?
    – Vlad Preda
    Nov 14, 2013 at 12:16
  • @VladPreda. The resource models are not meant to be instantiated with Mage::getModel. Use Mage::getResourceModel('reports/product_collection'). The fact that it works I think it's a bug/feature of the getModel method
    – Marius
    Nov 14, 2013 at 12:22

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