Add dunning_procedure property on Move Line

This will ease the customization of the dunning procedure to use per line.

issue4630
review7981004

CHANGELOG

@@ -1,4 +1,6 @@
+* Add dunning_procedure property on Move Line
 * Add support for PyPy
+
 Version 3.4.0 - 2014-10-20
 * Bug fixes (see mercurial logs for details)
 
@@ -6,4 +8,4 @@ Version 3.2.0 - 2014-04-21
 * Bug fixes (see mercurial logs for details)
 
 Version 3.0.0 - 2013-10-21
-* Initial release
+* Initial release

account.py

@@ -55,3 +55,8 @@ class MoveLine:
     __name__ = 'account.move.line'
 
     dunnings = fields.One2Many('account.dunning', 'line', 'Dunnings')
+
+    @property
+    def dunning_procedure(self):
+        if self.party:
+            return self.party.dunning_procedure

dunning.py

@@ -224,7 +224,7 @@ class Dunning(ModelSQL, ModelView):
 
     @classmethod
     def _get_dunning(cls, line, date):
-        procedure = line.party.dunning_procedure
+        procedure = line.dunning_procedure
         if not procedure:
             return
         for level in procedure.levels: