What class (if any) is called with this line of code?
Mage::getResourceModel('sales/order_invoice_collection')
Essentially I"m trying to figure out what database table is accessed with this resource model and how I can tweak that. Thanks!
The class you are looking for is this:
Mage_Sales_Model_Mysql4_Order_Invoice_Collection
located in app/code/core/Mage/Sales/Model/Mysql4/Order/Invoice/Collection.php
.
If you take a look at the configuration for the sales module app/code/core/Mage/Sales/etc/config.xml
, you can see the table name in the definition of the resource models:
<config>
<global>
<models>
<sales_mysql4>
<entities>
...
<invoice><table>sales_flat_invoice</table></invoice>
...
</entities>
</sales_mysql4>
</models>
</global>
</config>
To learn more about how Magento interacts with the database, you should read about models, resource models, and collections: