gistfile1.php

<?php

/**
 * Fix importer mappings for file and image fields to use :uri convention.
 */
function feeds_update_7210(&$sandbox) {
  // If this is the first pass through this update function then set some variables.
  if (!isset($sandbox['progress'])) {
    $sandbox['importers'] = feeds_importer_load_all(TRUE);
    $sandbox['progress'] = 0;
    $sandbox['max'] = count($sandbox['importers']);
  }

  $importer_index = $sandbox['progress'];
  $importer = array_pop($sandbox['importers']);
  $processor = $importer->processor;
  $config = $processor->getConfig();
  foreach ($config['mappings'] as $id => $mapping) {
    // Act on mappings that do not contain a colon.
    if (!strpos($mapping['target'], ':')) {
      // Get field data. Check if $info is empty to weed out non-field mappings like temporary targets.
      $info = field_info_field($mapping['target']);
      if (!empty($info)) {
        // Act on file or image fields.
        if (in_array($info['type'], array('file', 'image'))) {
          // Add ':uri' to fix the mapping.
          $config['mappings'][$id]['target'] = $mapping['target'] . ':uri';
        }
      }
    }
  }
  // Add the updated config and save the importer.
  $processor->addConfig(array('mappings' => $config['mappings']));
  $importer->save();

  $sandbox['progress']++;

  // Set the value for finished. If progress == max then finished will be 1, signifying we are done.
  $sandbox['#finished'] = ($sandbox['progress'] / $sandbox['max']);

  return t('@importers importers processed.', array('@importers' => $sandbox['max']));
}