Magento: Disable module for any particular store

Question

Suppose, I have 3 stores.

I want to disable a module in Store 2. I only want it to be enabled in Store 1 and Store 3.

I see that I can do it by:-

Answer 1

I was using Eric solution for a while. In my case I disabled certain module responsible for Layered Navigation in one of my shops - thus returning to default Layered Navigation behaviour.

And it looked like its working, but after a while I've noticed that layered navigation options stopped to appear where they should. Soon I've noticed that in fact the module that should not work on this shop continued to work. Then I realized that when I disable configuration cache Eric's solution works, but after enabling it again it stops.

After a while I realized it had to work that way, with configuration cache enabled, because Eric's solution includes (or not) specified config files in global xml only while this xml is being generated. Then its cached and called from cache only. So when it was generated from site which should use some module it was included, and then used also on site which wasn't suppose to use it.

Anyway I worked out another solution, based on Eric's code (using restricted in modules config). I thought Magento should decide what to load when class is being requested. Then it could check what is current MAGE_RUN_CODE and use it dynamically.

There is a method in Mage_Core_Model_Config which is responsible for getting class name: getGroupedClassName.

Here is the code I used there:

if (strpos($className, 'Pneumatig_') !== false) {
    $var = substr($className, 0, strpos($className, '_', strpos($className, '_') + 1));
    if (isset($this->_xml->modules->$var)) { 
        if ((bool)$this->_xml->modules->$var->restricted === true) {
            $code = isset($_SERVER['MAGE_RUN_CODE']) ? $_SERVER['MAGE_RUN_CODE'] : 'default';
            if (strpos((string)$this->_xml->modules->$var->restricted, $code) !== false) {
                $className = '';
            }
        }
    }
}

This Pneumatig condition is because all my modules start from Company name, so i wanted to avoid not necessary processing, but its optional, code should work without it, or you can change it to anything else.

Then I get actual module name [Company]_[Module], and then check if its enabled in _xml (which is current configuration object). If it is restricted I clear $className so it force Magento to load the default in next line.

And this code is added just before is empty condition:

    // Second - if entity is not rewritten then use class prefix to form class name
    if (empty($className)) {
        if (!empty($config)) {
            $className = $config->getClassName();
        }
        if (empty($className)) {
            $className = 'mage_'.$group.'_'.$groupType;
        }
        if (!empty($class)) {
            $className .= '_'.$class;
        }
        $className = uc_words($className);
    }

    $this->_classNameCache[$groupRootNode][$group][$class] = $className;
    return $className;

And for your convenience i paste whole getGroupedClassName code:

public function getGroupedClassName($groupType, $classId, $groupRootNode=null)
{
    if (empty($groupRootNode)) {
        $groupRootNode = 'global/'.$groupType.'s';
    }

    $classArr = explode('/', trim($classId));
    $group = $classArr[0];
    $class = !empty($classArr[1]) ? $classArr[1] : null;

    if (isset($this->_classNameCache[$groupRootNode][$group][$class])) {
        return $this->_classNameCache[$groupRootNode][$group][$class];
    }

    $config = $this->_xml->global->{$groupType.'s'}->{$group};

    // First - check maybe the entity class was rewritten
    $className = null;
    if (isset($config->rewrite->$class)) {
        $className = (string)$config->rewrite->$class;
    } else {
        /**
         * Backwards compatibility for pre-MMDB extensions.
         * In MMDB release resource nodes <..._mysql4> were renamed to <..._resource>. So  is left
         * to keep name of previously used nodes, that still may be used by non-updated extensions.
         */
        if (isset($config->deprecatedNode)) {
            $deprecatedNode = $config->deprecatedNode;
            $configOld = $this->_xml->global->{$groupType.'s'}->$deprecatedNode;
            if (isset($configOld->rewrite->$class)) {
                $className = (string) $configOld->rewrite->$class;
            }
        }
    }

    //START CHECKING IF CLASS MODULE IS ENABLED
    if (strpos($className, 'Pneumatig_') !== false) {
        $var = substr($className, 0, strpos($className, '_', strpos($className, '_') + 1));
        if (isset($this->_xml->modules->$var)) { 
            if ((bool)$this->_xml->modules->$var->restricted === true) {
                $code = isset($_SERVER['MAGE_RUN_CODE']) ? $_SERVER['MAGE_RUN_CODE'] : 'default';
                if (strpos((string)$this->_xml->modules->$var->restricted, $code) !== false) {
                    $className = '';
                }
            }
        }
    }
    //END CHECKING IF CLASS MODULE IS ENABLED

    // Second - if entity is not rewritten then use class prefix to form class name
    if (empty($className)) {
        if (!empty($config)) {
            $className = $config->getClassName();
        }
        if (empty($className)) {
            $className = 'mage_'.$group.'_'.$groupType;
        }
        if (!empty($class)) {
            $className .= '_'.$class;
        }
        $className = uc_words($className);
    }

    $this->_classNameCache[$groupRootNode][$group][$class] = $className;
    return $className;
}