function system_update_8014

Move system logging settings from variables to config.

Related topics

File

drupal/core/modules/system/system.install, line 1433

Install, update and uninstall functions for the system module.

Code

function system_update_8014() {

  // Not using update_variables_to_config(), since the only value is
  // 'error_level', which needs to be mapped to a new value.
  $config = config('system.logging');
  $error_level = db_query("SELECT value FROM {variable} WHERE name = 'error_level'")
    ->fetchField();
  if ($error_level !== FALSE) {
    $error_level = unserialize($error_level);
    $map = array(
      '0' => 'hide',
      '1' => 'some',
      '2' => 'all',
      '3' => 'verbose',
    );

    // Update error_level value to a string identifier.
    $config
      ->set('error_level', $map[$error_level]);

    // Delete the migrated variable.
    db_delete('variable')
      ->condition('name', 'error_level')
      ->execute();
  }
  else {

    // Set error_level to the default value.
    $config
      ->set('error_level', 'all');
  }
  $config
    ->save();
}