Drupalのモジュール(Entity Reference)で作成した記事からほかの記事への参照リンク作成

/**
 * Implements hook_feeds_processor_targets_alter().
 */
function my_module_feeds_feeds_processor_targets_alter(array &$targets, $entity_type, $bundle)
{
  if( $entity_type=="node"&&$bundle=="chinese_word"){
    $field_info = field_info_instances("node", "chinese_word") ;
    if( array_key_exists('field_ch_word_sentences', $field_info ) &&
        field_info_field( 'field_ch_word_sentences' )['type'] == "entityreference" ){
      $targets["field_ch_word_sentences:drills_hander"] = array(
        'name' => check_plain( $field_info['field_ch_word_sentences']['label'] ).t(' (Import multiple value instance field)'),
        'callback' => 'drills_custom_feeds_set_target_entity_reference',
        'description' => t('This filed for converting Chinese Examples to word reference only.Do not use it for other fields!!'),
      );
    }
  }
}

function drills_custom_feeds_set_target_entity_reference($source, &$entity, $target, $value, $mapping){
  if (empty($value)) {
    return;
  }
  $target = str_replace(':drills_hander', '', $target);
  $query = db_query("select title, nid, CHAR_LENGTH(title) as char_num from node where title like '%".$value[0]."%' and type='example_sentences'  order by char_num limit 100");
  $sentences = $query->fetchAll();
  $field = array();
  foreach( $sentences as $i => $sentence ){
    $field[LANGUAGE_NONE][$i]['target_id'] = $sentence->nid;
  }
  $entity->{$target} = $field;
}