[FIX] purchase: Error when updating dropship order

Steps to reproduce the issue:

- change the demo user settings -> use Sales: User: All Documents only
- create a stockable product with dropship feature on and a supplier
- connect as the demo user
- create a sales order with this product
- confirm the order
- as the admin user, confirm the purchase order generated through dropship
- connect as the demo user
- open the confirmed SO
- add a line with this product
- save the SO

Bug:

An access rights error was raised.

opw:1866015

addons/purchase/models/purchase.py

@@ -138,8 +138,8 @@ class PurchaseOrder(models.Model):
         ('invoiced', 'No Bill to Receive'),
         ], string='Billing Status', compute='_get_invoiced', store=True, readonly=True, copy=False, default='no')
 
-    picking_count = fields.Integer(compute='_compute_picking', string='Receptions', default=0, store=True)
-    picking_ids = fields.Many2many('stock.picking', compute='_compute_picking', string='Receptions', copy=False, store=True)
+    picking_count = fields.Integer(compute='_compute_picking', string='Receptions', default=0, store=True, compute_sudo=True)
+    picking_ids = fields.Many2many('stock.picking', compute='_compute_picking', string='Receptions', copy=False, store=True, compute_sudo=True)
 
     # There is no inverse function on purpose since the date may be different on each line
     date_planned = fields.Datetime(string='Scheduled Date', compute='_compute_date_planned', store=True, index=True)
@@ -636,7 +636,7 @@ class PurchaseOrderLine(models.Model):
 
     # Replace by invoiced Qty
     qty_invoiced = fields.Float(compute='_compute_qty_invoiced', string="Billed Qty", digits=dp.get_precision('Product Unit of Measure'), store=True)
-    qty_received = fields.Float(compute='_compute_qty_received', string="Received Qty", digits=dp.get_precision('Product Unit of Measure'), store=True)
+    qty_received = fields.Float(compute='_compute_qty_received', string="Received Qty", digits=dp.get_precision('Product Unit of Measure'), store=True, compute_sudo=True)
 
     partner_id = fields.Many2one('res.partner', related='order_id.partner_id', string='Partner', readonly=True, store=True)
     currency_id = fields.Many2one(related='order_id.currency_id', store=True, string='Currency', readonly=True)

addons/purchase_mrp/models/purchase_mrp.py

@@ -8,7 +8,7 @@ from odoo.tools import float_compare
 class PurchaseOrderLine(models.Model):
     _inherit = 'purchase.order.line'
 
-    qty_received = fields.Float(compute='_compute_qty_received', string="Received Qty", store=True)
+    qty_received = fields.Float(compute='_compute_qty_received', string="Received Qty", store=True, compute_sudo=True)
 
     def _compute_qty_received(self):
         super(PurchaseOrderLine, self)._compute_qty_received()