[FIX] l10n_us: ABA/Routing number

Edit/create a bank account:
- Add a correct ABA number => nothing is displayed
- Add an incorrect number (e.g. with letters) => it crashes

Combining an `Integer` field with a `char` widget is just a bad idea...

opw-781069

addons/l10n_us/i18n/l10n_us.pot

 # Translation of Odoo Server.
 # This file contains the translation of the following modules:
+#	* l10n_us
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: Odoo Server 9.0\n"
+"Project-Id-Version: Odoo Server 11.0+e\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2015-09-07 14:56+0000\n"
-"PO-Revision-Date: 2015-09-07 14:56+0000\n"
+"POT-Creation-Date: 2017-11-07 09:32+0000\n"
+"PO-Revision-Date: 2017-11-07 09:32+0000\n"
 "Last-Translator: <>\n"
 "Language-Team: \n"
 "MIME-Version: 1.0\n"
@@ -14,3 +15,18 @@ msgstr ""
 "Content-Transfer-Encoding: \n"
 "Plural-Forms: \n"
 
+#. module: l10n_us
+#: model:ir.model.fields,field_description:l10n_us.field_res_partner_bank_aba_routing
+msgid "ABA/Routing"
+msgstr ""
+
+#. module: l10n_us
+#: code:addons/l10n_us/models/res_partner_bank.py:16
+#, python-format
+msgid "ABA/Routing should only contains numbers (maximum 9 digits)."
+msgstr ""
+
+#. module: l10n_us
+#: model:ir.model.fields,help:l10n_us.field_res_partner_bank_aba_routing
+msgid "American Bankers Association Routing Number"
+msgstr ""

addons/l10n_us/models/res_partner_bank.py

 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import fields, models
+import re
+from odoo import fields, models, api, _
+from odoo.exceptions import UserError
 
 
 class ResPartnerBank(models.Model):
     _inherit = 'res.partner.bank'
 
     aba_routing = fields.Integer(string="ABA/Routing", help="American Bankers Association Routing Number")
+
+    def _check_aba_routing(self, aba_routing):
+        if aba_routing and not re.match(r'^\d{1,9}$', aba_routing):
+            raise UserError(_('ABA/Routing should only contains numbers (maximum 9 digits).'))
+        return aba_routing
+
+    # ONLY FOR v11. DO NOT FORWARDPORT!
+    @api.model
+    def create(self, vals):
+        if vals.get('aba_routing'):
+            vals['aba_routing'] = int(self._check_aba_routing(vals['aba_routing']))
+        return super(ResPartnerBank, self).create(vals)
+
+    @api.multi
+    def write(self, vals):
+        if vals.get('aba_routing'):
+            vals['aba_routing'] = int(self._check_aba_routing(vals['aba_routing']))
+        return super(ResPartnerBank, self).write(vals)
+
+    @api.multi
+    def read(self, fields=None, load='_classic_read'):
+        result = super(ResPartnerBank, self).read(fields, load=load)
+        for record in result:
+            if record.get('aba_routing'):
+                record['aba_routing'] = str(record['aba_routing'])
+        return result