[FIX] sale_purchase: adapt POL description

When confirming a sale order, if a purchase order is generated, the
descriptions of the PO's lines won't be adapted to the vendor

To reproduce the issue:
1. Create a vendor V
2. Create a product P:
    - Type: Service
    - In Purchase, add a line L01:
        - Vendor: V
        - Vendor Product Name: Name01
        - Vendor Product Code: C01
    - Purchase Automatically: True
3. Create and Confirm a SO with 1 x P
4. Open the generated PO

Error: The description is incorrect (it's the standard name of P instead
of "[C01] Name01")

OPW-2777702

closes odoo/odoo#86256

closes odoo/odoo#86679

X-original-commit: 77a2ad4b81c54fe6a91f2be242345c9d2af10dc0
Signed-off-by: Tiffany Chang <tic@odoo.com>
Signed-off-by: Adrien Widart <awt@odoo.com>

addons/sale_purchase/models/sale_order_line.py

@@ -6,6 +6,7 @@ from dateutil.relativedelta import relativedelta
 from odoo import api, fields, models, _
 from odoo.exceptions import UserError
 from odoo.tools import float_compare
+from odoo.tools.misc import get_lang
 
 
 class SaleOrderLine(models.Model):
@@ -163,14 +164,21 @@ class SaleOrderLine(models.Model):
 
         # compute unit price
         price_unit = 0.0
+        product_ctx = {
+            'lang': get_lang(self.env, purchase_order.partner_id.lang).code,
+            'company_id': purchase_order.company_id,
+        }
         if supplierinfo:
             price_unit = self.env['account.tax'].sudo()._fix_tax_included_price_company(
                 supplierinfo.price, supplier_taxes, taxes, self.company_id)
             if purchase_order.currency_id and supplierinfo.currency_id != purchase_order.currency_id:
                 price_unit = supplierinfo.currency_id._convert(price_unit, purchase_order.currency_id, purchase_order.company_id, fields.datetime.today())
+            product_ctx.update({'seller_id': supplierinfo.id})
+        else:
+            product_ctx.update({'partner_id': purchase_order.partner_id.id})
 
         return {
-            'name': '[%s] %s' % (self.product_id.default_code, self.name) if self.product_id.default_code else self.name,
+            'name': self.product_id.with_context(**product_ctx).display_name,
             'product_qty': purchase_qty_uom,
             'product_id': self.product_id.id,
             'product_uom': self.product_id.uom_po_id.id,

addons/sale_purchase/tests/test_sale_purchase.py

@@ -225,3 +225,33 @@ class TestSalePurchase(TestCommonSalePurchaseNoChart):
         self.assertEqual(len(purchase_order2.order_line), 1, "The 2nd PO has only one line")
         self.assertEqual(purchase_line2.sale_line_id, self.sol1_service_purchase_1, "The 2nd PO line came from the SO line sol1_service_purchase_1")
         self.assertEqual(purchase_line2.product_qty, delta, "The quantity of the new PO line is the quantity added on the Sale Line, after first PO confirmation")
+
+    def test_pol_description(self):
+        service = self.env['product.product'].create({
+            'name': 'Super Product',
+            'type': 'service',
+            'service_to_purchase': True,
+            'seller_ids': [(0, 0, {
+                'partner_id': self.partner_vendor_service.id,
+                'min_qty': 1,
+                'price': 10,
+                'product_code': 'C01',
+                'product_name': 'Name01',
+                'sequence': 1,
+            })]
+        })
+
+        so = self.env['sale.order'].create({
+            'partner_id': self.partner_a.id,
+            'order_line': [
+                (0, 0, {
+                    'name': service.name,
+                    'product_id': service.id,
+                    'product_uom_qty': 1,
+                })
+            ],
+        })
+        so.action_confirm()
+
+        po = self.env['purchase.order'].search([('partner_id', '=', self.partner_vendor_service.id)], order='id desc', limit=1)
+        self.assertEqual(po.order_line.name, "[C01] Name01")