public function DatabaseStorage::exists in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Config/DatabaseStorage.php \Drupal\Core\Config\DatabaseStorage::exists()
2. 10 core/lib/Drupal/Core/Config/DatabaseStorage.php \Drupal\Core\Config\DatabaseStorage::exists()

Returns whether a configuration object exists.

Parameters

string $name: The name of a configuration object to test.

Return value

bool TRUE if the configuration object exists, FALSE otherwise.

Overrides StorageInterface::exists

File

core/lib/Drupal/Core/Config/DatabaseStorage.php, line 67

Class

DatabaseStorage

Defines the Database storage.

Namespace

Drupal\Core\Config

Code

public function exists($name) {
  try {
    return (bool) $this->connection
      ->queryRange('SELECT 1 FROM {' . $this->connection
      ->escapeTable($this->table) . '} WHERE collection = :collection AND name = :name', 0, 1, [
      ':collection' => $this->collection,
      ':name' => $name,
    ], $this->options)
      ->fetchField();
  } catch (\Exception $e) {

    // If we attempt a read without actually having the database or the table
    // available, just return FALSE so the caller can handle it.
    return FALSE;
  }
}