Issue #3383219 by Lendude, greatmatter, HeikkiY, PapaGrande, hansfn: Views RSS Feed Fields adds <time> tag

(cherry picked from commit 2e94575d27)

core/modules/views/src/Plugin/views/row/RssFields.php

@@ -136,7 +136,9 @@ class RssFields extends RowPluginBase {
     $item->description = is_array($field) ? $field : ['#markup' => $field];
 
     $item->elements = [
-      ['key' => 'pubDate', 'value' => $this->getField($row_index, $this->options['date_field'])],
+      // Default rendering of date fields adds a <time> tag and whitespace, we
+      // want to remove these because this breaks RSS feeds.
+      ['key' => 'pubDate', 'value' => trim(strip_tags($this->getField($row_index, $this->options['date_field'])))],
       [
         'key' => 'dc:creator',
         'value' => $this->getField($row_index, $this->options['creator_field']),

core/modules/views/tests/modules/views_test_config/test_views/views.view.test_display_feed.yml

@@ -47,6 +47,20 @@ display:
           plugin_id: field
           entity_type: node
           entity_field: title
+        created:
+          id: created
+          table: node_field_data
+          field: created
+          relationship: none
+          group_type: group
+          admin_label: ''
+          entity_type: node
+          entity_field: created
+          plugin_id: field
+          type: timestamp
+          settings:
+            date_format: custom
+            custom_date_format: 'Y-m-d'
         body:
           id: body
           table: node__body
@@ -315,7 +329,7 @@ display:
           link_field: view_node
           description_field: body
           creator_field: title
-          date_field: title
+          date_field: created
           guid_field_options:
             guid_field: view_node
             guid_field_is_permalink: true

core/modules/views/tests/src/Kernel/Plugin/RssFieldsTest.php

@@ -42,20 +42,23 @@ class RssFieldsTest extends ViewsKernelTestBase {
   }
 
   /**
-   * Tests correct processing of link fields.
+   * Tests correct processing of RSS fields.
    *
    * This overlaps with \Drupal\Tests\views\Functional\Plugin\DisplayFeedTest to
    * ensure that root-relative links also work in a scenario without
    * subdirectory.
    */
-  public function testLink() {
+  public function testRssFields() {
     // Set up the current user as uid 1 so the test doesn't need to deal with
     // permission.
     $this->setUpCurrentUser(['uid' => 1]);
 
+    $date = '1975-05-18';
+
     $node = $this->createNode([
       'type' => 'article',
       'title' => 'Article title',
+      'created' => strtotime($date),
       'body' => [
         0 => [
           'value' => 'A paragraph',
@@ -72,6 +75,7 @@ class RssFieldsTest extends ViewsKernelTestBase {
     $output = $view->preview('feed_2');
     $output = (string) $renderer->renderRoot($output);
     $this->assertStringContainsString('<link>' . $node_url . '</link>', $output);
+    $this->assertStringContainsString('<pubDate>' . $date . '</pubDate>', $output);
   }
 
 }