[IMP] base_location: Include onchange for state

Incredibly not included in Odoo core.

base_location/__manifest__.py

@@ -1,9 +1,10 @@
 # Copyright 2016 Nicolas Bessi, Camptocamp SA
+# Copyright 2018 Tecnativa - Pedro M. Baeza
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 {
     'name': 'Location management (aka Better ZIP)',
-    'version': '11.0.1.0.0',
+    'version': '11.0.1.0.1',
     'depends': [
         'base_address_city'
     ],

base_location/models/company.py

@@ -1,4 +1,5 @@
 # Copyright 2016 Nicolas Bessi, Camptocamp SA
+# Copyright 2018 Tecnativa - Pedro M. Baeza
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from odoo import models, fields, api
@@ -62,3 +63,8 @@ class ResCompany(models.Model):
                 self.state_id = self.city_id.state_id
             else:
                 self.state_id = self.zip_id.state_id
+
+    @api.onchange('state_id')
+    def onchange_state_id(self):
+        if self.state_id.country_id:
+            self.country_id = self.state_id.country_id.id

base_location/models/partner.py

@@ -1,4 +1,5 @@
 # Copyright 2016 Nicolas Bessi, Camptocamp SA
+# Copyright 2018 Tecnativa - Pedro M. Baeza
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from odoo import api, fields, models, _
@@ -64,3 +65,8 @@ class ResPartner(models.Model):
                 raise ValidationError(_(
                     "The city of partner %s differs from that in "
                     "location %s") % (rec.name, rec.zip_id.name))
+
+    @api.onchange('state_id')
+    def onchange_state_id(self):
+        if self.state_id.country_id:
+            self.country_id = self.state_id.country_id.id