[FIX] sale: store triggers for related stored `company_id` sale orders

When changing the company of a sales order,
the change was not propagated to the related, stored, company field
of its sale order lines

These triggers makes that happen.

opw-694683

addons/sale/sale.py

@@ -910,6 +910,13 @@ class sale_order_line(osv.osv):
             res[line.id] = line.price_subtotal / line.product_uom_qty if line.product_uom_qty else 0.0
         return res
 
+    def _get_sale_order(self, cr, uid, ids, context=None):
+        result = set()
+        for order in self.pool['sale.order'].browse(cr, uid, ids, context=context):
+            for line in order.order_line:
+                result.add(line.id)
+        return list(result)
+
     _name = 'sale.order.line'
     _description = 'Sales Order Line'
     _columns = {
@@ -944,7 +951,9 @@ class sale_order_line(osv.osv):
                     \n* The \'Cancelled\' status is set when a user cancel the sales order related.'),
         'order_partner_id': fields.related('order_id', 'partner_id', type='many2one', relation='res.partner', store=True, string='Customer'),
         'salesman_id':fields.related('order_id', 'user_id', type='many2one', relation='res.users', store=True, string='Salesperson'),
-        'company_id': fields.related('order_id', 'company_id', type='many2one', relation='res.company', string='Company', store=True, readonly=True),
+        'company_id': fields.related('order_id', 'company_id', type='many2one', relation='res.company', string='Company', store={
+            'sale.order': (_get_sale_order, ['company_id'], 20),
+        }, readonly=True),
         'delay': fields.float('Delivery Lead Time', required=True, help="Number of days between the order confirmation and the shipping of the products to the customer", readonly=True, states={'draft': [('readonly', False)]}),
         'procurement_ids': fields.one2many('procurement.order', 'sale_line_id', 'Procurements'),
     }