Issue #1940440 by vijaycs85: Fixed schema discovery to identify schema with more than one wildcard.

core/lib/Drupal/Core/Config/Schema/SchemaDiscovery.php

@@ -48,7 +48,7 @@ class SchemaDiscovery implements DiscoveryInterface {
     if (isset($this->definitions[$base_plugin_id])) {
       $type = $base_plugin_id;
     }
-    elseif (strpos($base_plugin_id, '.') && ($name = $this->getFallbackName($base_plugin_id)) && isset($this->definitions[$name])) {
+    elseif (strpos($base_plugin_id, '.') && $name = $this->getFallbackName($base_plugin_id)) {
       // Found a generic name, replacing the last element by '*'.
       $type = $name;
     }
@@ -95,13 +95,28 @@ class SchemaDiscovery implements DiscoveryInterface {
    * @param string $name
    *   Configuration name or key.
    *
-   * @return string
+   * @return null|string
-   *   Same name with the last part replaced by the filesystem marker.
+   *   Same name with the last part(s) replaced by the filesystem marker.
+   *   for example, breakpoint.breakpoint.module.toolbar.narrow check for
+   *   definition in below order:
+   *     breakpoint.breakpoint.module.toolbar.*
+   *     breakpoint.breakpoint.module.*.*
+   *     breakpoint.breakpoint.*.*.*
+   *     breakpoint.*.*.*.*
+   *   Returns null, if no matching element.
    */
-  protected static function getFallbackName($name) {
+  protected function getFallbackName($name) {
-    $replaced = preg_replace('/\.[^.]+$/', '.' . '*', $name);
+    // Check for definition of $name with filesystem marker.
+    $replaced = preg_replace('/(\.[^\.]+)([\.\*]*)$/', '.*\2', $name);
     if ($replaced != $name ) {
+      if (isset($this->definitions[$replaced])) {
         return $replaced;
       }
+      else {
+        // No definition for this level(for example, breakpoint.breakpoint.*),
+        // check for next level (which is, breakpoint.*.*).
+        return self::getFallbackName($replaced);
+      }
+    }
   }
 }

core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php

@@ -129,6 +129,24 @@ class ConfigSchemaTest extends DrupalUnitTestBase {
     $expected['type'] =  'image.effect.image_scale';
 
     $this->assertEqual($definition, $expected, 'Retrieved the right metadata for the first effect of image.style.medium');
+
+    // More complex, multiple filesystem marker test.
+    $definition = config_typed()->getDefinition('config_test.someschema.somemodule.section_one.subsection');
+    // This should be the schema of config_test.someschema.somemodule.*.*.
+    $expected = array();
+    $expected['label'] = 'Schema multiple filesytem marker test';
+    $expected['class'] = '\Drupal\Core\Config\Schema\Mapping';
+    $expected['mapping']['id']['type'] = 'string';
+    $expected['mapping']['id']['label'] = 'ID';
+    $expected['mapping']['description']['type'] = 'text';
+    $expected['mapping']['description']['label'] = 'Description';
+
+    $this->assertEqual($definition, $expected, 'Retrieved the right metadata for config_test.someschema.somemodule.section_one.subsection');
+
+    $definition = config_typed()->getDefinition('config_test.someschema.somemodule.section_two.subsection');
+    // The other file should have the same schema.
+    $this->assertEqual($definition, $expected, 'Retrieved the right metadata for config_test.someschema.somemodule.section_two.subsection');
+
   }
 
   /**

core/modules/config/tests/config_test/config/config_test.someschema.somemodule.section_one.subsection.yml

@@ -0,0 +1,2 @@
+testid: 'Test id'
+testdescription: 'Test description'

core/modules/config/tests/config_test/config/config_test.someschema.somemodule.section_two.subsection.yml

@@ -0,0 +1,2 @@
+testid: 'Test id'
+testdescription: 'Test description'

core/modules/config/tests/config_test/config/schema/config_test.schema.yml

@@ -6,3 +6,14 @@ config_test.someschema:
       label: "Test item"
     "testlist":
       label: "Test list"
+
+config_test.someschema.somemodule.*.*:
+  type: mapping
+  label: 'Schema multiple filesytem marker test'
+  mapping:
+    id:
+      type: string
+      label: 'ID'
+    description:
+      type: text
+      label: 'Description'