[Solved]Magento 1.9 Override RoundPrice

Question

Vers. Magento 1.9.3.9

I need to override thi function from Mage_Core_Model_Store

public function roundPrice($price)
{
    return round($price, 2);
}

So I created e new module:

app/etc/modules/MyCompany.xml

<config>
     <modules>
        <MyCompany_RoundPrice>
            <active>true</active>
            <codePool>local</codePool>
            <depends>
                 <Mage_Core />
            </depends>
       </MyCompany_RoundPrice>
    </modules>
</config>

app/code/local/MyCompany/RoundPrice/etc/config.xml

<?xml version="1.0" encoding="utf-8"?>
<config>
  <modules>
    <MyCompany_RoundPrice>
      <version>0.1.0</version>
    </MyCompany_RoundPrice>
  </modules>
  <global>
    <models>
      <roundprice>
        <class>MyCompany_RoundPrice_Model</class>
      </roundprice>
      <core>
        <rewrite>
          <store>MyCompany_RoundPrice_Model_Store</store>
        </rewrite>
      </core>
    </models>
  </global>
</config>

app/code/local/MyCompany/RoundPrice/Model/Store.php

<?php

class MyCompany_RoundPrice_Model_Store extends Mage_Core_Model_Store
{
    public function roundPrice($price)
    {
        return round($price, 4);
    }
}

It should work but it doesn't.

What is wrong???

EDIT

Some tests:

echo Mage::helper('core')->isModuleEnabled('MyCompany_RoundPrice').'<br />'; //output 1
echo Mage::helper('core')->isModuleOutputEnabled('MyCompany_RoundPrice').'<br />'; //output 1
echo Mage::getModel('roundprice/store')->roundPrice(1.23456789); //output 1.2347
echo Mage::getModel('core/store')->roundPrice(1.23456789); //output 1.23

The module is active and reachable, but doesn't override the core file.

Answer 1

Same old story

There was another module that already override Mage_Core_Model_Store

So i needed to modify app/etc/modules/MyCompany.xml as follow:

<config>
     <modules>
        <MyCompany_RoundPrice>
            <active>true</active>
            <codePool>local</codePool>
            <depends>
                 <Other_Module />
            </depends>
       </MyCompany_RoundPrice>
    </modules>
</config>

Now it works.

Answer 2

Your config.xml has some mistakes. Follow in this way..

< ?xml version="1.0"?>
<config>
    <modules>
        <my_core>
            <version>0.1.0</version>
        </my_core>
    </modules>
    <global>
       <models>
          <core>
              <rewrite>
                  <store>My_Core_Model_Store</Store>
              </rewrite>
          </core>
       </models>
    </global>
</config>

and also in the model class, You need to extend the Parent Class Name. For Ex: My_Core_Model_Filename extends Mage_Core_Model_Store

In this way you can override it.