Fix union between recordset and parent recordset in base_exception

base_exception/__manifest__.py

@@ -4,7 +4,7 @@
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 {
     'name': 'Exception Rule',
-    'version': '12.0.2.0.2',
+    'version': '12.0.2.0.3',
     'category': 'Generic Modules',
     'summary': """
     This module provide an abstract model to manage customizable

base_exception/models/base_exception.py

@@ -61,6 +61,16 @@ class BaseExceptionMethod(models.AbstractModel):
     _name = 'base.exception.method'
     _description = 'Exception Rule Methods'
 
+    @api.multi
+    def _get_main_records(self):
+        """
+            Used in case we check exceptions on a record but write these
+            exceptions on a parent record. Typical example is with
+            sale.order.line. We check exceptions on some sale order lines but
+            write these exceptions on the sale order, so they are visible.
+        """
+        return self
+
     @api.multi
     def _reverse_field(self):
         raise NotImplementedError()
@@ -85,7 +95,8 @@ class BaseExceptionMethod(models.AbstractModel):
             records_with_exception = self._detect_exceptions(rule)
             reverse_field = self._reverse_field()
             if self:
-                commons = self & rule[reverse_field]
+                main_records = self._get_main_records()
+                commons = main_records & rule[reverse_field]
                 to_remove = commons - records_with_exception
                 to_add = records_with_exception - commons
                 to_remove_list = [(3, x.id, _) for x in to_remove]