doesn't check follower requirement with an other follower or a leader if idx is None (fixes #3)

tiramisu/option/baseoption.py

@@ -397,7 +397,10 @@ class BaseOption(Base):
         super(BaseOption, self).__setattr__(name, value)
 
     def impl_getpath(self) -> str:
-        return self._path
+        try:
+            return self._path
+        except AttributeError:
+            raise AttributeError(_('"{}" not part of any Config').format(self.impl_get_display_name()))
 
     def impl_has_callback(self) -> bool:
         "to know if a callback has been defined or not"

tiramisu/option/option.py

@@ -388,13 +388,13 @@ class Option(BaseOption):
     def impl_is_leader(self):
         leadership = self.impl_get_leadership()
         if leadership is None:
-            return leadership
-        return self.impl_get_leadership().is_leader(self)
+            return False
+        return leadership.is_leader(self)
 
     def impl_is_follower(self):
         leadership = self.impl_get_leadership()
         if leadership is None:
-            return leadership
+            return False
         return not leadership.is_leader(self)
 
     def impl_get_leadership(self):

tiramisu/setting.py

@@ -523,6 +523,10 @@ class Settings(object):
                     is_indexed = False
                     if option.impl_is_follower():
                         idx = option_bag.index
+                        if idx is None:
+                            continue
+                    elif option.impl_is_leader() and option_bag.index is None:
+                        continue
                     elif option.impl_is_multi() and option_bag.index is not None:
                         is_indexed = True
                     config_bag = option_bag.config_bag.copy()