sale_down_payment: add a hook that can be used for notifications

sale_down_payment/models/account_move_line.py

@@ -30,3 +30,8 @@ class AccountMoveLine(models.Model):
     def sale_advance_payement_account_id_change(self):
         if self.sale_id and self.account_id.user_type_id.type != 'receivable':
             self.sale_id = False
+
+    def _sale_down_payment_hook(self):
+        # can be used for notifications
+        self.ensure_one()
+

sale_down_payment/models/account_payment.py

@@ -25,6 +25,14 @@ class AccountPayment(models.Model):
             res['sale_id'] = self.sale_id.id
         return res
 
+    def _create_payment_entry(self, amount):
+        move = super()._create_payment_entry(amount)
+        if hasattr(self, 'sale_id') and self.sale_id:
+            for line in move.line_ids:
+                if line.sale_id and line.account_id.internal_type == 'receivable':
+                    line._sale_down_payment_hook()
+        return move
+
 
 class AccountAbstractPayment(models.AbstractModel):
     _inherit = "account.abstract.payment"

sale_down_payment/wizard/account_bank_statement_sale.py

@@ -64,7 +64,9 @@ class AccountBankStatementSale(models.TransientModel):
         self.ensure_one()
         for line in self.line_ids:
             if line.move_line_id.sale_id != line.sale_id:
-                line.move_line_id.sale_id = line.sale_id.id
+                line.move_line_id.write({'sale_id': line.sale_id.id or False})
+                if line.sale_id:
+                    line.move_line_id._sale_down_payment_hook()
 
 
 class AccountBankStatementSaleLine(models.TransientModel):