dynamic templates are a list of hashes and have a mapping key (not properties)

Author: Tobion

DependencyInjection/Configuration.php

@@ -250,16 +250,21 @@ public function getDynamicTemplateNode()
         $node = $builder->root('dynamic_templates');
 
         $node
-            ->useAttributeAsKey('name')
             ->prototype('array')
-                ->children()
-                    ->scalarNode('match')->end()
-                    ->scalarNode('unmatch')->end()
-                    ->scalarNode('match_mapping_type')->end()
-                    ->scalarNode('path_match')->end()
-                    ->scalarNode('path_unmatch')->end()
-                    ->scalarNode('match_pattern')->end()
-                    ->append($this->getPropertiesNode())
+                ->prototype('array')
+                    ->children()
+                        ->scalarNode('match')->end()
+                        ->scalarNode('unmatch')->end()
+                        ->scalarNode('match_mapping_type')->end()
+                        ->scalarNode('path_match')->end()
+                        ->scalarNode('path_unmatch')->end()
+                        ->scalarNode('match_pattern')->end()
+                        ->arrayNode('mapping')
+                            ->prototype('variable')
+                                ->treatNullLike(array())
+                            ->end()
+                        ->end()
+                    ->end()
                 ->end()
             ->end()
         ;