Get rid of cache management

account_invoice_triple_discount/models/line_triple_discount.py

@@ -79,16 +79,13 @@ def triple_discount_preprocess(self):
         this method is called multiple times.
         Updating the cache provides consistency through recomputations."""
         prev_values = dict()
-        self.invalidate_cache(
-            fnames=['discount', 'discount2', 'discount3'],
-            ids=self.ids)
         for line in self:
             prev_values[line] = dict(
                 discount=line.discount,
                 discount2=line.discount2,
                 discount3=line.discount3,
             )
-            line._cache.update({
+            line.update({
                 'discount': line._get_final_discount(),
                 'discount2': 0.0,
                 'discount3': 0.0
@@ -99,8 +96,5 @@ def triple_discount_preprocess(self):
     def triple_discount_postprocess(self, prev_values):
         """Restore the discounts of the lines in the dictionary prev_values.
         Updating the cache provides consistency through recomputations."""
-        self.invalidate_cache(
-            fnames=['discount', 'discount2', 'discount3'],
-            ids=[l.id for l in list(prev_values.keys())])
         for line, prev_vals_dict in list(prev_values.items()):
-            line._cache.update(prev_vals_dict)
+            line.update(prev_vals_dict)