bka

Setting values into core_config_data with an install script

It took me a while to figure out how to write configuration values within an install script. My first approach to use \Magento\Config\Model\Config was a dead end, because it requires some AuthenticationInterface and wants to initialize a session which does not play very well with command line tasks like bin/magento setup:upgrade. In the end it was the famous Area code not set Exception.

[Magento\Framework\Exception\LocalizedException]
Area code is not set

Instead of trying to use OOP and DI practice, just write them with a core db connection, this reduces a lot of pain. By the way, this is how other core modules are writing their values.

<?php

protected function saveConfigValue($path, $value){
  $data = [
      'scope' => 'default',
      'scope_id' => 0,
      'path' => $path,
      'value' => $value,
  ];
  $this->setup->getConnection()
      ->insertOnDuplicate($this->setup->getTable('core_config_data'), $data, ['value']);
}

<?php

$this->saveConfigValue("design/header/welcome ", "Welcome")