[12.0][MIG] account_tax_balance

account_tax_balance/models/account_tax.py

@@ -2,7 +2,7 @@
 # © 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from openerp import models, fields, api, _
+from odoo import _, api, fields, models
 
 
 class AccountTax(models.Model):
@@ -80,9 +80,13 @@ class AccountTax(models.Model):
         for tax in self:
             tax.has_moves = tax.id in ids_with_moves
 
+    @api.model
+    def _is_unsupported_search_operator(self, operator):
+        return operator != '='
+
     @api.model
     def _search_has_moves(self, operator, value):
-        if operator != '=' or not value:
+        if self._is_unsupported_search_operator(operator) or not value:
             raise ValueError(_("Unsupported search operator"))
         ids_with_moves = self._account_tax_ids_with_moves()
         return [('id', 'in', ids_with_moves)]