Does Magento 2 have a high level abstraction that allows end-user-programmers to update configuration values in the core_config_data table? Or is using straight SQL the only way to do this in Magento 2?

i.e. in Magento 1, you could do something like this

$config_model = new Mage_Core_Model_Config();
$config_model->saveConfig('my/config/path', $unique_id, 'default', 0);

and save configuration values into core_config_data. Is there an equivalent in Magento 2?


There is the same saveConfig method: https://github.com/magento/magento2/blob/2.0.0/app/code/Magento/Config/Model/ResourceModel/Config.php#L26-L61

A usage example from the core: https://github.com/magento/magento2/blob/2.0.0/app/code/Magento/Payment/Observer/UpdateOrderStatusForPaymentMethodsObserver.php#L59-L64

  • +1 Useful, thank you! I'm going to leave the question open for a while to see if an @api marked answers bubble up to the top. – Alan Storm Dec 8 '15 at 0:25
  • It does change the value in the database but it doesn't reflect on the config page UI –  coinhndp Jul 28 '20 at 12:56

I wouldn't use a model or a resource model, but \Magento\Framework\App\Config\Storage\WriterInterface or \Magento\Framework\App\Config\ConfigResource\ConfigInterface (the first delegating to the second).

Pretty straight-forward, too:

use Magento\Framework\App\Config\Storage\WriterInterface;

class SomeClass {

    public function __construct(WriterInterface $configWriter)
        $configWriter->save('some/config/path', 'some value');
  • Thanks! I think this is the better approach/high level abstraction we should be using. Because \Magento\Framework\App\Config\Storage\WriterInterface is implemented by \Magento\Framework\App\Config\Storage\Writer which in turn uses \Magento\Config\Model\ResourceModel\Config. – Andrei Sep 26 '17 at 16:29

For a high level abstraction I'd inject Magento\Framework\App\Config\Storage\WriterInterface into the constructor of a data setup script:

use Magento\Framework\App\Config\Storage\WriterInterface; 

public function __construct(WriterInterface $configWriter) {...}

Then use the save() method, for example:

$website = $this->websiteRepository->get('main_website'); // inject Magento\Store\Model\WebsiteRepository;

$this->configWriter->save('general/country/default', 'US', ScopeInterface::SCOPE_WEBSITES, $website->getId()); // inject Magento\Store\Model\ScopeInterface;

Notes: Use the plural form of scopes: websites / stores in Magento\Store\Model\ScopeInterface


You can also use \Magento\Config\Model\Config::save. Below a simple sample:

$configData = [
    'section' => 'MY_SECTION',
    'website' => null,
    'store'   => null,
    'groups'  => [
        'MY_GROUP' => [
            'fields' => [
                'MY_FIELD' => [
                    'value' => $myValue,

// $this->configFactory --> \Magento\Config\Model\Config\Factory
/** @var \Magento\Config\Model\Config $configModel */
$configModel = $this->configFactory->create(['data' => $configData]);

This syntax is not "simple", but it's more safe for some case. Du to the save logic, the action might be slower than direct access to the db.

In my case, $value need to be encrypted. In system.xml, I set the backend model for the field, and the save logic encrypt the data.

Edit: \Magento\Config\Model\Config::setDataByPath more simple to use


Here a complete sample to handle Magento 2 configuration programatically.

In my case, i add to clear cache too, else changes does not appear in Store > Config.

 * @var \Magento\Config\Model\ResourceModel\Config
protected $resourceConfig;

 * @var \Magento\Framework\App\Cache\TypeListInterface
protected $cacheTypeList;

public function __construct(
    \Magento\Config\Model\ResourceModel\Config $resourceConfig,
    \Magento\Framework\App\Cache\TypeListInterface $cacheTypeList
) {
    $this->resourceConfig = $resourceConfig;
    $this->cacheTypeList = $cacheTypeList;

public function process()
  • I clear the cache like your code but it still doesn't show –  coinhndp Jul 28 '20 at 13:02

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