erp5_json_form: fix raises on validation errors and when missing after method

bt5/erp5_json_form/ModuleComponentTemplateItem/portal_components/document.erp5.JSONForm.py

@@ -63,14 +63,14 @@ class JSONForm(JSONType, TextDocument):
                     )
 
   def __call__(self, json_data, list_error=False): #pylint:disable=arguments-differ
-    validation_result = self.validateJSON(json_data, list_error)
+    data_dict = json.loads(json_data)
+    validation_result = self.validateJSON(data_dict, list_error)
     if validation_result is not True:
       if not list_error:
         raise jsonschema.exceptions.ValidationError(validation_result.message)
       else:
         raise ValueError(json.dumps(validation_result))
 
-    data_dict = json.loads(json_data)
     if self.getAfterMethodId():
       after_method = getattr(getattr(self, "aq_parent", None), self.getAfterMethodId())
       mapped_data_dict = self._mapArguments(data_dict, "input")
@@ -82,7 +82,7 @@ class JSONForm(JSONType, TextDocument):
       mapped_output_dict = self._mapArguments(output_dict, "output")
       return json.dumps(mapped_output_dict)
 
-    return "Nothing to do"
+    raise NotImplementedError("No after method")
 
   def _mapArguments(self, arguments, mapping_type):
     mappings = {x.getSource(): x.getDestination() for x in self.objectValues(portal_type="Argument Mapping")  if x.getMappingType() == mapping_type}