[FIX] stock: empty warehouse when company is not set.

When the user do not set a company on a route and check warehouse selectable
then it's impossible to select a warehouse. It happens due to the
check_company domain ['|', ('company_id', '=', company_id)('company_id','=',False)]

closes odoo/odoo#37404

Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com>

addons/stock/models/stock_location.py

@@ -187,9 +187,21 @@ class Route(models.Model):
         'product.template', 'stock_route_product', 'route_id', 'product_id',
         'Products', copy=False, check_company=True)
     categ_ids = fields.Many2many('product.category', 'stock_location_route_categ', 'route_id', 'categ_id', 'Product Categories', copy=False)
+    warehouse_domain_ids = fields.One2many('stock.warehouse', compute='_compute_warehouses')
     warehouse_ids = fields.Many2many(
         'stock.warehouse', 'stock_route_warehouse', 'route_id', 'warehouse_id',
-        'Warehouses', copy=False, check_company=True)
+        'Warehouses', copy=False, domain="[('id', 'in', warehouse_domain_ids)]")
+
+    @api.depends('company_id')
+    def _compute_warehouses(self):
+        for loc in self:
+            domain = [('company_id', '=', loc.company_id.id)] if loc.company_id else []
+            loc.warehouse_domain_ids = self.env['stock.warehouse'].search(domain)
+
+    @api.onchange('company_id')
+    def _onchange_company(self):
+        if self.company_id:
+            self.warehouse_ids = self.warehouse_ids.filtered(lambda w: w.company_id == self.company_id)
 
     @api.onchange('warehouse_selectable')
     def _onchange_warehouse_selectable(self):

addons/stock/views/stock_location_views.xml

@@ -184,6 +184,7 @@
                         </group>
                         <group>
                             <field name="warehouse_selectable" string="Warehouses"/>
+                            <field name="warehouse_domain_ids" invisible="1"/>
                             <field name="warehouse_ids"  widget="many2many_tags" nolabel="1"
                                    attrs="{'invisible': [('warehouse_selectable', '=', False)]}"/>
                         </group>