function dbtng_migrator_settings_validate in DBTNG Migrator 7

Validation handler for form dbtng_migrator_settings.

File

./dbtng_migrator.admin.inc, line 194

Code

function dbtng_migrator_settings_validate($form, $form_state) {
  if ($form_state['values']['migrate_destination'] == $form_state['values']['migrate_origin']) {
    form_set_error('migrate_destination', t('Migration origin cannot be the same as the destination.'));
    return;
  }
  $origin = $form_state['values']['migrate_origin'];
  $dest = $form_state['values']['migrate_destination'];

  // Connect to the origin and generate a list of tables in the database.
  db_set_active($origin);
  include_once DRUPAL_ROOT . '/includes/install.inc';

  // Load install files to expose hook_schema_alter hooks.
  drupal_load_updates();
  $modules = module_list(TRUE);
  $tables = array();
  foreach ($modules as $module) {
    $schema = drupal_get_schema_unprocessed($module);
    _drupal_schema_initialize($schema, $module, TRUE);

    // Some modules won't actually have a schema.
    if (!is_array($schema)) {
      continue;
    }
    foreach ($schema as $table => $info) {
      $tables[] = $table;
    }
  }

  // Check that those tables don't already exists in the destination.
  db_set_active($dest);
  foreach ($tables as $table) {
    if (db_table_exists($table)) {
      form_set_error('migrate_destination', t('%table already exists in destination database. DBTNG Migrator will not override existing data', array(
        '%table' => $table,
      )));
    }
  }
  db_set_active('default');
}