Issue #1809222 by dawehner: Replace specific cache behavior in...

Issue #1809222 by dawehner: Replace specific cache behavior in viewExecuteable::execute with None cache plugin.

core/modules/views/lib/Drupal/views/Plugin/views/cache/None.php

@@ -29,10 +29,22 @@ public function summaryTitle() {
     return t('None');
   }
 
+
+  /**
+   * Overrides \Drupal\views\Plugin\views\cache\CachePluginBase::cache_get().
+   *
+   * Replace the cache get logic so it does not return a cache item at all.
+   */
   function cache_get($type) {
     return FALSE;
   }
 
-  function cache_set($type) { }
+  /**
+   * Overrides \Drupal\views\Plugin\views\cache\CachePluginBase::cache_set().
+   *
+   * Replace the cache set logic so it does set a cache item at all.
+   */
+  function cache_set($type) {
+  }
 
 }

core/modules/views/lib/Drupal/views/ViewExecutable.php

@@ -1184,12 +1184,12 @@ public function execute($display_id = NULL) {
 
     // Check for already-cached results.
     if (!empty($this->live_preview)) {
-      $cache = FALSE;
+      $cache = $this->display_handler->getPlugin('cache', 'none');
     }
     else {
       $cache = $this->display_handler->getPlugin('cache');
     }
-    if ($cache && $cache->cache_get('results')) {
+    if ($cache->cache_get('results')) {
       if ($this->pager->use_pager()) {
         $this->pager->total_items = $this->total_rows;
         $this->pager->update_page_info();
@@ -1201,10 +1201,8 @@ public function execute($display_id = NULL) {
       // views_plugin_query::execute().
       $this->result = array_values($this->result);
       $this->_postExecute();
-      if ($cache) {
       $cache->cache_set('results');
     }
-    }
 
     // Let modules modify the view just after executing it.
     foreach (module_implements('views_post_execute') as $module) {