added more info in GenericStoreOne error generated by validate()

models/utils/common.go

@@ -49,7 +49,7 @@ func GenericStoreOne(data DBObject, a Accessor) (DBObject, int, error) {
 	}
 	err := validate.Struct(data)
 	if err != nil {
-		return nil, 422, err
+		return nil, 422, errors.New("error when validating the received struct: " + err.Error())
 	}
 	id, code, err := mongo.MONGOService.StoreOne(data, data.GetID(), a.GetType().String())
 	if err != nil {