Migrate support: Sub-module for upgrade-path from cck_country / general support

Migrate support was added here: #1378662: Add support for Migrate API

Reopen if you have issues

btw, hopefully I will find the time to roll a new tag soon, the last one was Feb 9, so this is lagging behind the dev branch slightly!

Hi just transfer queues to see if there is any way that the countries module can assist users upgrading from cck_country field. Internally the schema is very similar I thing.

Thanks in advance

Implementing a migration path between two contrib modules is most certainly not in the Migrate module's domain - it's up to the destination module to make use of the Migrate API in implementing the migration path.

I personally have extremely limited time atm, I was just trying to get pointers....

This would definitely need addressing:

+    else {
+      // TODO: is it possible ?
+      print "warning: unknown field configuration, please report the following at https://drupal.org/node/1840472\n";
+      var_dump($field, $record);
+    }

Maybe drupal_set_message() instead?

And I guess general migrate support can be added at the same time. We just done a big D6 to D7 data migration and I do not think that this was used, or if from another unrelated issue post... And may not have any testing...

The raw code from my local countries.module.

# info file
files[] = countries.migrate.inc

# main module
/**
 * Implements hook_migrate_api().
 */
function countries_migrate_api() {
  $api = array(
    'api' => 2,
    'field handlers' => array('MigrateCountryFieldHandler'),
  );
  return $api;
}

# countries.migrate.inc

/**
 * @file
 * Base integration with the Migrate API class.
 */

/**
 * Custom extended MigrateFieldHandler class.
 */
class MigrateCountryFieldHandler extends MigrateFieldHandler {
  public function __construct() {
    $this->registerTypes(array('country'));
  }

  public function prepare($entity, array $field_info, array $instance, array $values) {
    $arguments = (isset($values['arguments'])) ? $values['arguments'] : array();
    $language = $this->getFieldLanguage($entity, $field_info, $arguments);
    $delta = 0;

    foreach ($values as $value) {
      $return[$language][$delta]['iso2'] = $value;
      $delta++;
    }

    return isset($return) ? $return : NULL;
  }
}

Makes sense to wrap all of this into one sub-module :)