[FIX] mrp_subcontracting_dropshipping: use a sub-location

When using a sub-location of "Subcontracing Location" and a dropshipped
component, the purchase order doesn't have any dropship address.

To reproduce the issue:
(Enable debug mode)
1. In Settings, enable "Multi-Step Routes"
2. Create a new location L:
    - Parent: Physical Locations/Subcontracting Location
    - Type: Internal Location
3. In Rules, duplicate the rules of route "Dropship Subcontractor on
Order" and replace "Physical Locations/Subcontracting Location" with L
4. Create two products:
    - P_finished:
        - Type: Storable
        - Vendor: V_subcontractor
    - P_compo:
        - Type: Consumable
        - Vendor: V_compo
        - Routes: Dropship Subcontractor on Order
5. Edit V_subcontractor:
    - Subcontractor Location: L
6. Create a bill of materials:
    - Product: P_finished
    - Type: Subcontracting
    - Subcontractor: V_subcontractor
    - Components: 1 x P_compo
7. Create and confirm a purchase order:
    - Vendor: V_subcontractor
    - Products: 1 x P_finished
8. Open the purchase order linked with P_compo

Error: the Dropship Address is not defined

This address is defined thanks to the value of `partner_id`:
https://github.com/odoo/odoo/blob/aec7fcdb693729f432ae2341c00ef317b65fbcbc/addons/purchase_stock/models/stock_rule.py#L300
However, this key is missing

OPW-2721474

closes odoo/odoo#92249

X-original-commit: 587d8cd0ecb956a5c1b1a32a7abadea3019f848e
Signed-off-by: William Henrotin (whe) <whe@odoo.com>
Signed-off-by: Adrien Widart <awt@odoo.com>

addons/mrp_subcontracting_dropshipping/models/stock_rule.py

@@ -8,6 +8,6 @@ class StockRule(models.Model):
     _inherit = 'stock.rule'
 
     def _prepare_purchase_order(self, company_id, origins, values):
-        if 'partner_id' not in values[0] and self.location_dest_id.id == company_id.subcontracting_location_id.id:
+        if 'partner_id' not in values[0] and company_id.subcontracting_location_id.parent_path in self.location_dest_id.parent_path:
             values[0]['partner_id'] = values[0]['group_id'].partner_id.id
         return super()._prepare_purchase_order(company_id, origins, values)

addons/mrp_subcontracting_dropshipping/tests/test_purchase_subcontracting.py

@@ -134,3 +134,60 @@ class TestSubcontractingDropshippingFlows(TestMrpSubcontractingCommon):
         self.assertEqual(move1.product_uom_qty, 1)
         self.assertEqual(move2.product_id, self.comp1)
         self.assertEqual(move2.product_uom_qty, 1)
+
+    def test_dropshipped_component_and_sub_location(self):
+        """
+        Suppose:
+            - a subcontracted product and a component dropshipped to the subcontractor
+            - the location of the subcontractor is a sub-location of the main subcontrating location
+        This test ensures that the PO that brings the component to the subcontractor has a correct
+        destination address
+        """
+        subcontract_location = self.env.company.subcontracting_location_id
+        sub_location = self.env['stock.location'].create({
+            'name': 'Super Location',
+            'location_id': subcontract_location.id,
+        })
+
+        dropship_subcontractor_route = self.env['stock.route'].search([('name', '=', 'Dropship Subcontractor on Order')])
+        dropship_subcontractor_route.rule_ids.filtered(lambda rule: rule.location_dest_id == subcontract_location).copy(default={'location_dest_id': sub_location.id})
+        dropship_subcontractor_route.rule_ids.filtered(lambda rule: rule.location_src_id == subcontract_location).copy(default={'location_src_id': sub_location.id})
+
+        subcontractor, vendor = self.env['res.partner'].create([
+            {'name': 'SuperSubcontractor', 'property_stock_subcontractor': sub_location.id},
+            {'name': 'SuperVendor'},
+        ])
+
+        p_finished, p_compo = self.env['product.product'].create([{
+            'name': 'Finished Product',
+            'type': 'product',
+            'seller_ids': [(0, 0, {'partner_id': subcontractor.id})],
+        }, {
+            'name': 'Component',
+            'type': 'consu',
+            'seller_ids': [(0, 0, {'partner_id': vendor.id})],
+            'route_ids': [(6, 0, dropship_subcontractor_route.ids)]
+        }])
+
+        self.env['mrp.bom'].create({
+            'product_tmpl_id': p_finished.product_tmpl_id.id,
+            'product_qty': 1,
+            'type': 'subcontract',
+            'subcontractor_ids': [(6, 0, subcontractor.ids)],
+            'bom_line_ids': [
+                (0, 0, {'product_id': p_compo.id, 'product_qty': 1}),
+            ],
+        })
+
+        subcontract_po = self.env['purchase.order'].create({
+            "partner_id": subcontractor.id,
+            "order_line": [(0, 0, {
+                'product_id': p_finished.id,
+                'name': p_finished.name,
+                'product_qty': 1.0,
+            })],
+        })
+        subcontract_po.button_confirm()
+
+        dropship_po = self.env['purchase.order'].search([('partner_id', '=', vendor.id)])
+        self.assertEqual(dropship_po.dest_address_id, subcontractor)