Disabling Custom module Overriding Adminhtml Block

Question

I'm Overriding Block. In module Config.xml

<config>
<global>
    <blocks>
        <modification>
            <class>Local_Modification_Block</class>
        </modification>
        <adminhtml>
            <rewrite>
                <customer_group_edit_form>Local_Modification_Block_Customer_Group_Edit_Form</customer_group_edit_form>
            </rewrite>
        </adminhtml>
    </blocks>
</global>

In Local/Modification/Block/Customer/Group/Edit/Form.php file content:

class Local_Modification_Block_Customer_Group_Edit_Form
    extends Mage_Adminhtml_Block_Customer_Group_Edit_Form
{
    protected function _prepareLayout()
    {
        parent::_prepareLayout();
    }
}

All is working, but, if I disable this module from System -> Configuration -> Advanced "Local_Modification". I'm not get any form...

Have ideas, what is wrong?

Answer 1

This is a common misunderstanding. "Disable modules output" does not disable the module, it only hides its own blocks, so it's a quick way to remove elements of a module from the frontend but does not disable any custom functionality.

To disable a module, you must edit the files in app/etc/modules:

<Local_Modification>
    <active>false</active>
</Local_Modification>