diff -u b/core/modules/aggregator/aggregator.module b/core/modules/aggregator/aggregator.module
--- b/core/modules/aggregator/aggregator.module
+++ b/core/modules/aggregator/aggregator.module
@@ -402,7 +402,7 @@
     try {
       if ($parser_manager->createInstance($config->get('parser'))->parse($feed)) {
         if (is_null($feed->getLink())) {
-          $feed->link->value = $feed->getUrl();
+          $feed->setLink($feed->getUrl());
         }
         $feed->setHash($hash);
         // Update feed with parsed data.
diff -u b/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php b/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php
--- b/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php
@@ -145,33 +145,32 @@
    *   A render array as expected by drupal_render().
    */
   public function adminOverview() {
-    $result = $this->database->query('SELECT f.fid, f.title, f.url, f.refresh, f.checked, f.link, f.description, f.hash, f.etag, f.modified, f.image, f.block, COUNT(i.iid) AS items FROM {aggregator_feed} f LEFT JOIN {aggregator_item} i ON f.fid = i.fid GROUP BY f.fid, f.title, f.url, f.refresh, f.checked, f.link, f.description, f.hash, f.etag, f.modified, f.image, f.block ORDER BY f.title');
-
+    $feeds = $this->entityManager->getStorageController('aggregator_feed')->loadMultiple();
     $header = array(t('Title'), t('Items'), t('Last update'), t('Next update'), t('Operations'));
     $rows = array();
-    foreach ($result as $feed) {
+    foreach ($feeds as $feed) {
       $row = array();
-      $row[] = l($feed->title, "aggregator/sources/{$feed->fid}");
+      $row[] = l($feed->label(), "aggregator/sources/{$feed->id()}");
       $row[] = format_plural($feed->items, '1 item', '@count items');
-      $row[] = ($feed->checked ? t('@time ago', array('@time' => format_interval(REQUEST_TIME - $feed->checked))) : t('never'));
-      $row[] = ($feed->checked && $feed->refresh ? t('%time left', array('%time' => format_interval($feed->checked + $feed->refresh - REQUEST_TIME))) : t('never'));
+      $row[] = ($feed->getChecked ? t('@time ago', array('@time' => format_interval(REQUEST_TIME - $feed->getChecked()))) : t('never'));
+      $row[] = ($feed->getChecked() && $feed->getRefresh() ? t('%time left', array('%time' => format_interval($feed->getChecked() + $feed->getRefresh() - REQUEST_TIME))) : t('never'));
       $links = array();
       $links['edit'] = array(
         'title' => t('Edit'),
-        'href' => "admin/config/services/aggregator/edit/feed/{$feed->fid}",
+        'href' => "admin/config/services/aggregator/edit/feed/{$feed->id()}",
       );
       $links['delete'] = array(
         'title' => t('Delete'),
-        'href' => "admin/config/services/aggregator/delete/feed/{$feed->fid}",
+        'href' => "admin/config/services/aggregator/delete/feed/{$feed->id()}",
       );
       $links['remove'] = array(
         'title' => t('Remove items'),
-        'href' => "admin/config/services/aggregator/remove/{$feed->fid}",
+        'href' => "admin/config/services/aggregator/remove/{$feed->id()}",
       );
       $links['update'] = array(
         'title' => t('Update items'),
-        'href' => "admin/config/services/aggregator/update/{$feed->fid}",
-        'query' => array('token' => drupal_get_token("aggregator/update/{$feed->fid}")),
+        'href' => "admin/config/services/aggregator/update/{$feed->id()}",
+        'query' => array('token' => drupal_get_token("aggregator/update/{$feed->id()}")),
       );
       $row[] = array(
         'data' => array(
only in patch2:
unchanged:
--- a/core/modules/aggregator/aggregator.pages.inc
+++ b/core/modules/aggregator/aggregator.pages.inc
@@ -524,27 +524,27 @@ function template_preprocess_aggregator_feed_source(&$variables) {
 
   $feed_icon = array(
     '#theme' => 'feed_icon',
-    '#url' => $feed->url->value,
+    '#url' => $feed->getUrl(),
     '#title' => t('!title feed', array('!title' => $feed->label())),
   );
   $variables['source_icon'] = drupal_render($feed_icon);
 
-  if (!empty($feed->image->value) && $feed->label() && !empty($feed->link->value)) {
+  if (!is_null($feed->getImage()) && $feed->label() && !is_null($feed->getLink())) {
     $image = array(
       '#theme' => 'image',
-      '#path' => $feed->image->value,
-      '#alt' => $feed->title->value,
+      '#path' => $feed->getImage(),
+      '#alt' => $feed->label(),
     );
-    $variables['source_image'] = l($image, $feed->link->value, array('html' => TRUE, 'attributes' => array('class' => 'feed-image')));
+    $variables['source_image'] = l($image, $feed->getLink(), array('html' => TRUE, 'attributes' => array('class' => 'feed-image')));
   }
   else {
     $variables['source_image'] = '';
   }
-  $variables['source_description'] = aggregator_filter_xss($feed->description->value);
-  $variables['source_url'] = check_url(url($feed->link->value, array('absolute' => TRUE)));
+  $variables['source_description'] = aggregator_filter_xss($feed->getDescription());
+  $variables['source_url'] = check_url(url($feed->getLink(), array('absolute' => TRUE)));
 
   if ($feed->checked) {
-    $variables['last_checked'] = t('@time ago', array('@time' => format_interval(REQUEST_TIME - $feed->checked->value)));
+    $variables['last_checked'] = t('@time ago', array('@time' => format_interval(REQUEST_TIME - $feed->getChecked())));
   }
   else {
     $variables['last_checked'] = t('never');
only in patch2:
unchanged:
--- a/core/modules/aggregator/lib/Drupal/aggregator/Tests/AggregatorRenderingTest.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Tests/AggregatorRenderingTest.php
@@ -70,7 +70,7 @@ public function testBlockLinks() {
 
     // Set the number of news items to 0 to test that the block does not show
     // up.
-    $feed->block = 0;
+    $feed->setBlock(0);
     $feed->save();
     // Check that the block is no longer displayed.
     $this->drupalGet('test-page');