[FIX] product, purchase: seller in multi-company

- Create 2 companies A & B
- For a product P, create a supplier info for each company using the
  same partner, with a different price and delay.
- Order the supplier so that the one for A has a higher priority than
  the one for B.
- Create a reordering rule for P in company B.
- Run the scheduler as admin (e.g. thanks to the cron).

The price taken is the price for company A instead of B.

`_select_seller` is not company-aware, therefore the first matching
supplier is chosen.

opw-1959263

closes odoo/odoo#32328

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/product/models/product.py

@@ -516,7 +516,10 @@ class ProductProduct(models.Model):
         if date is None:
             date = fields.Date.today()
         res = self.env['product.supplierinfo']
-        for seller in self.seller_ids:
+        sellers = self.seller_ids
+        if self.env.context.get('force_company'):
+            sellers = sellers.filtered(lambda s: not s.company_id or s.company_id.id == self.env.context['force_company'])
+        for seller in sellers:
             # Set quantity in UoM of seller
             quantity_uom_seller = quantity
             if quantity_uom_seller and uom_id and uom_id != seller.product_uom:

addons/purchase/models/purchase.py

@@ -958,7 +958,11 @@ class ProcurementOrder(models.Model):
         """Return the datetime value to use as Order Date (``date_order``) for the
            Purchase Order created to satisfy the given procurement. """
         self.ensure_one()
-        seller_delay = int(self.product_id._select_seller(quantity=self.product_qty, uom_id=self.product_uom).delay)
+        seller_delay = int(
+            self.product_id.with_context(force_company=self.company_id.id)._select_seller(
+                quantity=self.product_qty, uom_id=self.product_uom
+            ).delay
+        )
         return schedule_date - relativedelta(days=seller_delay)
 
     @api.multi
@@ -966,7 +970,7 @@ class ProcurementOrder(models.Model):
         self.ensure_one()
 
         procurement_uom_po_qty = self.product_uom._compute_quantity(self.product_qty, self.product_id.uom_po_id)
-        seller = self.product_id._select_seller(
+        seller = self.product_id.with_context(force_company=self.company_id.id)._select_seller(
             partner_id=supplier.name,
             quantity=procurement_uom_po_qty,
             date=po.date_order and po.date_order[:10],