add feature to disallow to disable pagination

Author: akira-dev

docs/configuration.rst

@@ -8,3 +8,4 @@ You have access to 3 configration keys:
 * PAGE_SIZE: the default page size (default is 30)
 * MAX_PAGE_SIZE: the maximum page size. If you speficy a page size greater than this value you will receive 400 Bad Request response.
 * MAX_INCLUDE_DEPTH: the maximum length of an include through schema relationships
+* ALLOW_DISABLE_PAGINATION: if you want to disallow to disable pagination you can set this configuration key to False

flask_rest_jsonapi/querystring.py

@@ -111,6 +111,9 @@ def pagination(self):
             except ValueError:
                 raise BadRequest("Parse error", source={'parameter': 'page[{}]'.format(key)})
 
+        if current_app.config.get('ALLOW_DISABLE_PAGINATION', True) is False and int(result.get('size', 1)) == 0:
+            raise BadRequest("You are not allowed to disable pagination", source={'parameter': 'page[size]'})
+
         if current_app.config.get('MAX_PAGE_SIZE') is not None and 'size' in result:
             if int(result['size']) > current_app.config['MAX_PAGE_SIZE']:
                 raise BadRequest("Maximum page size is {}".format(current_app.config['MAX_PAGE_SIZE']),