Issue #3154858 by kristiaanvandeneynde: Drupal\Core\Config\Entity\Que…

…ry\Condition::notExists() does not work when parent property is also missing

(cherry picked from commit 87468a5d70a06aa8f7da15f339405dd6c24be9a2)

lib/Drupal/Core/Config/Entity/Query/Condition.php

@@ -130,6 +130,11 @@ protected function matchArray(array $condition, array $data, array $needs_matchi
             return TRUE;
           }
         }
+        // If the parent does not exist, it's safe to say the actual property
+        // we're checking for is also NULL.
+        elseif ($condition['operator'] === 'IS NULL') {
+          return TRUE;
+        }
       }
       // Only try to match a scalar if there are no remaining keys in
       // $needs_matching as this indicates that we are looking for a specific

tests/Drupal/KernelTests/Core/Entity/ConfigEntityQueryTest.php

@@ -606,6 +606,16 @@ public function testDotted() {
       ->notExists('array')
       ->execute();
     $this->assertResults([]);
+    // Make sure that "IS NULL" and "IS NOT NULL" work correctly when the dotted
+    // path cannot be fully followed.
+    $this->queryResults = $this->entityStorage->getQuery()
+      ->exists('does.not.exist')
+      ->execute();
+    $this->assertResults([]);
+    $this->queryResults = $this->entityStorage->getQuery()
+      ->notExists('does.not.exist')
+      ->execute();
+    $this->assertResults($all);
   }
 
   /**