[FIX] sale: onchange on sale order line to set customer lead time

This would lead delivery orders not to be too late by default
and a correct scheduled date on the procurement

addons/sale/sale.py

@@ -498,6 +498,11 @@ class SaleOrderLine(models.Model):
         for line in self:
             line.price_reduce = line.price_subtotal / line.product_uom_qty if line.product_uom_qty else 0.0
 
+    @api.onchange('product_id')
+    def _onchange_product_id(self):
+        for line in self:
+            line.customer_lead = line.product_id and line.product_id.sale_delay or 0.0
+
     @api.multi
     @api.onchange('order_id', 'product_id')
     def _compute_tax_id(self):

addons/sale/sale_view.xml

@@ -259,6 +259,7 @@
                                     <field name="qty_delivered_updateable" invisible="1"/>
                                     <field name="state" invisible="1"/>
                                     <field name="invoice_status" invisible="1"/>
+                                    <field name="customer_lead" invisible="1"/>
                                 </tree>
                                 <kanban class="o_kanban_mobile">
                                     <field name="product_id"/>