Why are my Magento Model and Helper overrides not being run?

Question

I'm trying to override the core Magento class Mage_Payment_Model_Info in order to solve an error.

To be clear, the override I am talking about has been entirely written by me, and is extending a core Magento model class. The override is not showing up in the stack trace generated by the error, the core version is. A list of solutions I have tried so far is as follows. None have been fully successful.

• Successfully able to override a block that is also part of this process and that override appears in the stack trace.
• Checked for any conflicts. I found some but when I changed my override extends so it extends from the potential conflict class it has no effect.
• Made the code in my override very similar to the original so I know it is not a result of the code I have changed.

• Added log statements to both my override and the original so I can confirm which version is being run. The code for the override is as follows:

  class Work_Rewrites_Model_Payment_Info extends Mage_Payment_Model_Info {
      public function getMethodInstance()
      {
          Mage::log("In rewrite payment info model");
          if (!$this->hasMethodInstance()) {
              if ($this->getMethod()) {
                  $instance = Mage::helper('payment')->getMethodInstance($this->getMethod());
                  if ($instance) {
                      $instance->setInfoInstance($this);
                      $this->setMethodInstance($instance);
                      return $instance;
                  }
              }
              //return false;
              Mage::throwException(Mage::helper('payment')->__('The requested Payment Method is not available.'));
          }
  
          return $this->_getData('method_instance');
      }
  }
  

Revlevant code from the config file is as follows:

    <config>
        <global>
            <models>
                <rewrites>
                    <class>Work_Rewrites_Model</class>
                </rewrites>
                <payment>
                    <rewrite>
                        <info>Work_Rewrites_Model_Payment_Info</info>
                    </rewrite>
                </payment>
            <models>
        <global>
    <config>

Thanks for your help

Answer 1

Try below code

 <config>
        <global>
            <models>
                <payment>
                    <rewrite>                       
                   <payment_info>Work_Rewrites_Model_Payment_Info</payment_info>
                    </rewrite>
                </payment>
            <models>
        <global>
    <config>