Update to Drupal 8.2.6. For more information, see https://www.drupal.org/project/drupal/releases/8.2.6

core/modules/views/config/schema/views.argument_default.schema.yml

@@ -1,5 +1,9 @@
 # Schema for the views default arguments.
 
+views.argument_default.*:
+  type: mapping
+  label: 'Base default argument'
+
 views.argument_default.fixed:
   type: mapping
   label: 'Fixed'
@@ -18,3 +22,17 @@ views.argument_default.raw:
     use_alias:
       type: boolean
       label: 'Use path alias'
+
+views.argument_default.query_parameter:
+  type: mapping
+  label: 'Query parameter'
+  mapping:
+    query_param:
+      type: string
+      label: 'Parameter'
+    fallback:
+      type: string
+      label: 'Fallback value'
+    multiple:
+      type: string
+      label: 'Multiple values'

core/modules/views/src/Plugin/Derivative/ViewsBlock.php

@@ -10,7 +10,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
 /**
  * Provides block plugin definitions for all Views block displays.
  *
- * @see \Drupal\views\Plugin\block\block\ViewsBlock
+ * @see \Drupal\views\Plugin\Block\ViewsBlock
  */
 class ViewsBlock implements ContainerDeriverInterface {
 

core/modules/views/src/Plugin/Derivative/ViewsExposedFilterBlock.php

@@ -9,7 +9,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
 /**
  * Provides block plugin definitions for all Views exposed filters.
  *
- * @see \Drupal\views\Plugin\block\block\ViewsExposedFilterBlock
+ * @see \Drupal\views\Plugin\Block\ViewsExposedFilterBlock
  */
 class ViewsExposedFilterBlock implements ContainerDeriverInterface {
 

core/modules/views/src/Plugin/views/display/Block.php

@@ -23,7 +23,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *   admin = @Translation("Block")
  * )
  *
- * @see \Drupal\views\Plugin\block\block\ViewsBlock
+ * @see \Drupal\views\Plugin\Block\ViewsBlock
  * @see \Drupal\views\Plugin\Derivative\ViewsBlock
  */
 class Block extends DisplayPluginBase {

core/modules/views/src/Tests/Plugin/ArgumentDefaultTest.php

@@ -2,10 +2,12 @@
 
 namespace Drupal\views\Tests\Plugin;
 
+use Drupal\Core\Url;
 use Drupal\node\Entity\Node;
 use Drupal\node\Entity\NodeType;
 use Drupal\views\Views;
 use Drupal\views_test_data\Plugin\views\argument_default\ArgumentDefaultTest as ArgumentDefaultTestPlugin;
+use Symfony\Component\HttpFoundation\Request;
 
 
 /**
@@ -25,6 +27,7 @@ class ArgumentDefaultTest extends PluginTestBase {
     'test_argument_default_fixed',
     'test_argument_default_current_user',
     'test_argument_default_node',
+    'test_argument_default_query_param',
     );
 
   /**
@@ -163,4 +166,24 @@ class ArgumentDefaultTest extends PluginTestBase {
     $this->assertTrue(strpos($this->xpath($xpath)[0]->asXml(), $node2->getTitle()));
   }
 
+  /**
+   * Tests the query parameter default argument.
+   */
+  public function testArgumentDefaultQueryParameter() {
+    $view = Views::getView('test_argument_default_query_param');
+
+    $request = Request::create(Url::fromUri('internal:/whatever', ['absolute' => TRUE])->toString());
+
+    // Check the query parameter default argument fallback value.
+    $view->setRequest($request);
+    $view->initHandlers();
+    $this->assertEqual($view->argument['type']->getDefaultArgument(), 'all');
+
+    // Check the query parameter default argument with a value.
+    $request->query->add(['the_node_type' => 'page']);
+    $view->setRequest($request);
+    $view->initHandlers();
+    $this->assertEqual($view->argument['type']->getDefaultArgument(), 'page');
+  }
+
 }

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

@@ -0,0 +1,62 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+id: test_argument_default_query_param
+label: ''
+module: views
+description: ''
+tag: ''
+base_table: node_field_data
+base_field: nid
+core: '8'
+display:
+  default:
+    display_options:
+      arguments:
+        type:
+          id: type
+          table: node_field_data
+          field: type
+          default_action: default
+          default_argument_type: query_parameter
+          default_argument_options:
+            query_param: the_node_type
+            fallback: all
+            multiple: and
+          entity_type: node
+          entity_field: type
+          plugin_id: node_type
+      fields:
+        title:
+          alter:
+            alter_text: false
+            ellipsis: true
+            html: false
+            make_link: false
+            strip_tags: false
+            trim: false
+            word_boundary: true
+          empty_zero: false
+          field: title
+          hide_empty: false
+          id: title
+          table: node_field_data
+          plugin_id: field
+          entity_type: node
+          entity_field: title
+      pager:
+        options:
+          id: 0
+          items_per_page: 10
+          offset: 0
+        type: full
+      style:
+        type: default
+      row:
+        type: fields
+    display_plugin: default
+    display_title: Master
+    id: default
+    position: 0

core/modules/views/views.install

@@ -405,6 +405,13 @@ function views_update_8200() {
   // Empty update to cause a cache rebuild so that the container is rebuilt.
 }
 
+/**
+ * Rebuild cache to refresh the views config schema.
+ */
+function views_update_8201() {
+  // Empty update to cause a cache rebuild so that config schema get refreshed.
+}
+
 /**
  * @} End of "addtogroup updates-8.2.0".
  */

core/modules/views/views.module

@@ -353,7 +353,7 @@ function views_theme_suggestions_container_alter(array &$suggestions, array $var
  *       should be shown.
  *     - #view_display_plugin_id: The plugin ID of the display.
  *
- * @see \Drupal\views\Plugin\block\block\ViewsBlock::addContextualLinks()
+ * @see \Drupal\views\Plugin\Block\ViewsBlock::addContextualLinks()
  * @see views_preprocess_page()
  * @see template_preprocess_views_view()
  */