Magento: Static blocks and configuration settings migration

Question

To migrate all changes to all environments I use database upgrade scripts. I use them to create different instances(customer, tax settings etc.) but usually to migrate static blocks and config settings. To migrate static blocks: ``` 'Block title', 'identifier' => 'block_identifier', 'content' => 'block content', 'is_active' => 1, 'stores' => array(0 => Mage_Core_Model_App::ADMIN_STORE_ID), ); $block->addData($data); $block->save(); ?> ``` To migrate settings: ``` saveConfig('design/theme/default', 'theme'); ?> ``` I know that we can modify Magento settings via config.xml: ``` My Store home ``` But as far as I understand we can modify settings in such way only if paths: general/store_information/name and gen…

Accepted Answer

You are right, values specified in the config xml files are overwritten by values from the `core_config_data` table. As B00MER pointed out, the code in question is in `Mage_Core_Model_Config::init()`:

```
public function init($options=array())
{
    $this->setCacheChecksum(null);
    $this->_cacheLoadedSections = array();
    $this->setOptions($options);
    $this->loadBase();

$cacheLoad = $this->loadModulesCache();
    if ($cacheLoad) {
        return $this;
    }
    $this->loadModules();
    $this->loadDb();
    $this->saveCache();
    return $this;
}
```

Notice that `loadDb()` is called after `loadModules()`. The actual merging logic is in the config resource model `Mage_Core_Model_Resource_Config::loadToXml()`.

For each global setting this is called:

```
$xmlConfig->setNode('default/' . $r['path'], $value);
```

For each website scope setting this is called:

```
$nodePath = sprintf('websites/%s/%s', $websites[$r['scope_id']]['code'], $r['path']);
$xmlConfig->setNode($nodePath, $value);
```

For each website scope setting this is called:

```
$nodePath = sprintf('stores/%s/%s', $stores[$r['scope_id']]['code'], $r['path']);
$xmlConfig->setNode($nodePath, $value);
```

This is slightly simplified, but if you need more detail you can look at the source.

Magento: Static blocks and configuration settings migration

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