[FIX] sale_stock, stock_dropshipping: ordered qty

- Set a vendor on Product A
- Create a SO with 1 Unit of A, set the Drop Ship route
- Confirm the SO
  => a PO with 1 Unit is created
- Change the oredered quantity to 2

The PO is updated with a total quantity of 3 instead of 2.

Since the removal of procurements, the quantity is computed based on the
stock moves. However, in this case, no stock move has been created since
the PO is not yet confirmed.

In this specific case, we fall back on the PO line quantity. The logic
is similar to `_quantity_in_progress`.

opw-1879118

addons/sale_stock/models/sale_order.py

@@ -217,6 +217,13 @@ class SaleOrderLine(models.Model):
         })
         return values
 
+    def _get_qty_procurement(self):
+        self.ensure_one()
+        qty = 0.0
+        for move in self.move_ids.filtered(lambda r: r.state != 'cancel'):
+            qty += move.product_uom._compute_quantity(move.product_uom_qty, self.product_uom, rounding_method='HALF-UP')
+        return qty
+
     @api.multi
     def _action_launch_procurement_rule(self):
         """
@@ -229,9 +236,7 @@ class SaleOrderLine(models.Model):
         for line in self:
             if line.state != 'sale' or not line.product_id.type in ('consu','product'):
                 continue
-            qty = 0.0
-            for move in line.move_ids.filtered(lambda r: r.state != 'cancel'):
-                qty += move.product_uom._compute_quantity(move.product_uom_qty, line.product_uom, rounding_method='HALF-UP')
+            qty = line._get_qty_procurement()
             if float_compare(qty, line.product_uom_qty, precision_digits=precision) >= 0:
                 continue
 

addons/stock_dropshipping/models/__init__.py

 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from . import purchase
\ No newline at end of file
+from . import purchase
+from . import sale

addons/stock_dropshipping/models/sale.py

+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, models, fields
+
+
+class SaleOrderLine(models.Model):
+    _inherit = "sale.order.line"
+
+    purchase_line_ids = fields.One2many('purchase.order.line', 'sale_line_id')
+
+    @api.multi
+    def _get_qty_procurement(self):
+        if not self.move_ids.filtered(lambda r: r.state != 'cancel') and self.purchase_line_ids.filtered(lambda r: r.state != 'cancel'):
+            qty = 0.0
+            for po_line in self.purchase_line_ids.filtered(lambda r: r.state != 'cancel'):
+                qty += po_line.product_uom._compute_quantity(po_line.product_qty, self.product_uom, rounding_method='HALF-UP')
+            return qty
+        else:
+            return super(SaleOrderLine, self)._get_qty_procurement()
+

addons/stock_dropshipping/tests/__init__.py

 # -*- coding: utf-8 -*-
 
+from . import test_dropship
 from . import test_stockvaluation
-

addons/stock_dropshipping/tests/test_dropship.py

+from odoo.tests.common import TransactionCase
+
+
+class TestDropship(TransactionCase):
+    def test_change_qty(self):
+        # enable the dropship and MTO route on the product
+        prod = self.env.ref('product.product_product_8')
+        dropshipping_route = self.env.ref('stock_dropshipping.route_drop_shipping')
+        mto_route = self.env.ref('stock.route_warehouse0_mto')
+        prod.write({'route_ids': [(6, 0, [dropshipping_route.id, mto_route.id])]})
+
+        # add a vendor
+        vendor1 = self.env['res.partner'].create({'name': 'vendor1'})
+        seller1 = self.env['product.supplierinfo'].create({
+            'name': vendor1.id,
+            'price': 8,
+        })
+        prod.write({'seller_ids': [(6, 0, [seller1.id])]})
+
+        # sell one unit of this product
+        cust = self.env['res.partner'].create({'name': 'customer1'})
+        so = self.env['sale.order'].create({
+            'partner_id': cust.id,
+            'partner_invoice_id': cust.id,
+            'partner_shipping_id': cust.id,
+            'order_line': [(0, 0, {
+                'name': prod.name,
+                'product_id': prod.id,
+                'product_uom_qty': 1.00,
+                'product_uom': prod.uom_id.id,
+                'price_unit': 12,
+            })],
+            'pricelist_id': self.env.ref('product.list0').id,
+            'picking_policy': 'direct',
+        })
+        so.action_confirm()
+        po = self.env['purchase.order'].search([('group_id', '=', so.procurement_group_id.id)])
+        po_line = po.order_line
+
+        # Check the qty on the P0
+        self.assertAlmostEqual(po_line.product_qty, 1.00)
+
+        # Update qty on SO and check PO
+        so.order_line.product_uom_qty = 2.00
+        self.assertAlmostEqual(po_line.product_qty, 2.00)