[FIX] purchase: access rights when validating a picking

When a warehouse user transfer an incoming shipment, the linked purchase order
is updated as well but the user may not have access to it.
Trigger the workflow as admin instead. opw 619775

addons/purchase/stock.py

@@ -19,6 +19,7 @@
 #
 ##############################################################################
 
+from openerp import SUPERUSER_ID
 from openerp.osv import fields, osv
 from openerp.tools.translate import _
 
@@ -39,10 +40,12 @@ class stock_move(osv.osv):
             for move in self.browse(cr, uid, ids, context=context):
                 if move.purchase_line_id and move.purchase_line_id.order_id:
                     order_id = move.purchase_line_id.order_id.id
+                    # update linked purchase order as superuser as the warehouse
+                    # user may not have rights to access purchase.order
                     if self.pool.get('purchase.order').test_moves_done(cr, uid, [order_id], context=context):
-                        workflow.trg_validate(uid, 'purchase.order', order_id, 'picking_done', cr)
+                        workflow.trg_validate(SUPERUSER_ID, 'purchase.order', order_id, 'picking_done', cr)
                     if self.pool.get('purchase.order').test_moves_except(cr, uid, [order_id], context=context):
-                        workflow.trg_validate(uid, 'purchase.order', order_id, 'picking_cancel', cr)
+                        workflow.trg_validate(SUPERUSER_ID, 'purchase.order', order_id, 'picking_cancel', cr)
         return res
 
     def copy(self, cr, uid, id, default=None, context=None):