erp5_hal_json_style: minor refactoring on hateoas script

bt5/erp5_hal_json_style/SkinTemplateItem/portal_skins/erp5_hal_json_style/ERP5Document_getHateoas.py

@@ -2289,13 +2289,7 @@ def calculateHateoas(is_portal=None, is_site_root=None, traversed_document=None,
         if fields_raw_properties:
           result_dict['fields_raw_properties'] = fields_raw_properties
 
-  else:
-    raise NotImplementedError("Unsupported mode %s" % mode)
-
-  # if form has my_form_definition field, set it with fields_raw_properties and form_definition
     # my_form_definition will be used for rendering in JS side
-  if "_embedded" in result_dict:
-    if "_view" in result_dict["_embedded"]:
     if "my_form_definition" in  result_dict["_embedded"]["_view"]:
       default_form_definition = result_dict["_embedded"]["_view"]["_embedded"]["form_definition"].copy()
       default_form_definition["group_list"] = result_dict["group_list"]
@@ -2305,6 +2299,9 @@ def calculateHateoas(is_portal=None, is_site_root=None, traversed_document=None,
         result_dict.pop('fields_raw_properties', None)
       result_dict["_embedded"]["_view"]["my_form_definition"]["default"] = default_form_definition
 
+  else:
+    raise NotImplementedError("Unsupported mode %s" % mode)
+
   return result_dict
 
 mime_type = 'application/hal+json'