[FIX] delivery: set carrier on all picking created by SO

When our warehouse is configured to work as 'pick -> pack -> ship'
only the last picking (ship) has the information of which carrier
is set for this delivery.

This is a problem, because we also need the information in the packing
zone, to put in a pack with the correct package type.

To fix this problem, instead of overriding the function 'action_confirm'
which put the 'carrier_id' only on the 'ship' location. We set the
'sale_order_id' on the procurement groups created from the sales
order, and propagate it to the picking through the stock moves
from the procurement group.

addons/delivery/models/stock_move.py

@@ -21,21 +21,7 @@ class StockMove(models.Model):
         for move in self.filtered(lambda moves: moves.product_id.weight > 0.00):
             move.weight = (move.product_qty * move.product_id.weight)
 
-    @api.multi
-    def action_confirm(self):
-        """
-            Pass the carrier to the picking from the sales order
-            (Should also work in case of Phantom BoMs when on explosion the original move is deleted)
-        """
-        procs_to_check = []
-        for move in self:
-            if move.procurement_id and move.procurement_id.sale_line_id and move.procurement_id.sale_line_id.order_id.carrier_id:
-                procs_to_check += [move.procurement_id]
-        res = super(StockMove, self).action_confirm()
-        for proc in procs_to_check:
-            pickings = (proc.move_ids.mapped('picking_id')).filtered(lambda record: not record.carrier_id)
-            if pickings:
-                pickings.write({
-                    'carrier_id': proc.sale_line_id.order_id.carrier_id.id,
-                })
-        return res
+    def _get_new_picking_values(self):
+        vals = super(StockMove, self)._get_new_picking_values()
+        vals['carrier_id'] = self.group_id.sale_order_id.carrier_id.id
+        return vals

addons/sale_stock/models/procurement.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import models
+from odoo import models, fields
 
 
 class ProcurementOrder(models.Model):
@@ -12,3 +12,7 @@ class ProcurementOrder(models.Model):
         if self.sale_line_id:
             vals.update({'sequence': self.sale_line_id.sequence})
         return vals
+
+class ProcurementGroup(models.Model):
+	_inherit = 'procurement.group'
+	sale_order_id = fields.Many2one('sale.order', string='Sale Order')

addons/sale_stock/models/sale_order.py

@@ -75,7 +75,7 @@ class SaleOrder(models.Model):
     @api.model
     def _prepare_procurement_group(self):
         res = super(SaleOrder, self)._prepare_procurement_group()
-        res.update({'move_type': self.picking_policy, 'partner_id': self.partner_shipping_id.id})
+        res.update({'move_type': self.picking_policy, 'partner_id': self.partner_shipping_id.id, 'sale_order_id': self.id})
         return res
 
     @api.model