Issue #3277784 by Tim Bozeman, mrinalini9, larowlan: copyRawVariables should...

Issue #3277784 by Tim Bozeman, mrinalini9, larowlan: copyRawVariables should support default route parameters

core/lib/Drupal/Core/Routing/Enhancer/ParamConversionEnhancer.php

@@ -67,6 +67,13 @@ protected function copyRawVariables(array $defaults) {
     foreach (array_intersect_key($defaults, $variables) as $key => $value) {
       $raw_variables[$key] = $value;
     }
+    // Route defaults that do not start with a leading "_" are also
+    // parameters, even if they are not included in path or host patterns.
+    foreach ($route->getDefaults() as $name => $value) {
+      if (!isset($raw_variables[$name]) && substr($name, 0, 1) !== '_') {
+        $raw_variables[$name] = $value;
+      }
+    }
     return new InputBag($raw_variables);
   }
 

core/tests/Drupal/Tests/Core/Enhancer/ParamConversionEnhancerTest.php

@@ -75,6 +75,7 @@ public function testEnhance() {
    */
   public function testCopyRawVariables() {
     $route = new Route('/test/{id}');
+    $route->setDefault('node_type', 'page');
     $defaults = [
       RouteObjectInterface::ROUTE_OBJECT => $route,
       'id' => '1',
@@ -90,7 +91,10 @@ public function testCopyRawVariables() {
 
         return $defaults;
       });
-    $expected = new InputBag(['id' => 1]);
+    $expected = new InputBag([
+      'id' => '1',
+      'node_type' => 'page',
+    ]);
     $result = $this->paramConversionEnhancer->enhance($defaults, new Request());
     $this->assertEquals($result['_raw_variables'], $expected);
   }