[12.x] Add whereJsonContainsKey and whereJsonDoesntContainKey methods

queries.md

@@ -689,23 +689,43 @@ $users = DB::table('users')
     ->get();
 ```
 
-You may use `whereJsonContains` to query JSON arrays:
+You may use the `whereJsonContains` and `whereJsonDoesntContain` methods to query JSON arrays:
 
 ```php
 $users = DB::table('users')
     ->whereJsonContains('options->languages', 'en')
     ->get();
+
+$users = DB::table('users')
+    ->whereJsonDoesntContain('options->languages', 'en')
+    ->get();
 ```
 
-If your application uses the MariaDB, MySQL, or PostgreSQL databases, you may pass an array of values to the `whereJsonContains` method:
+If your application uses the MariaDB, MySQL, or PostgreSQL databases, you may pass an array of values to the `whereJsonContains` and `whereJsonDoesntContain` methods:
 
 ```php
 $users = DB::table('users')
     ->whereJsonContains('options->languages', ['en', 'de'])
     ->get();
+
+$users = DB::table('users')
+    ->whereJsonDoesntContain('options->languages', ['en', 'de'])
+    ->get();
+```
+
+In addition, you may use the `whereJsonContainsKey` or `whereJsonDoesntContainKey` methods to retrieve the results that include or do not include a JSON key:
+
+```php
+$users = DB::table('users')
+    ->whereJsonContainsKey('preferences->dietary_requirements')
+    ->get();
+
+$users = DB::table('users')
+    ->whereJsonDoesntContainKey('preferences->dietary_requirements')
+    ->get();
 ```
 
-You may use `whereJsonLength` method to query JSON arrays by their length:
+Finally, you may use `whereJsonLength` method to query JSON arrays by their length:
 
 ```php
 $users = DB::table('users')