Fix task 025, command@bees follower of purchase order

beesdoo_purchase/models/purchase.py

@@ -8,7 +8,10 @@ class PurchaseOrder(models.Model):
     def create(self, vals):
         purchase_order = super(PurchaseOrder, self).create(vals)
         command_contact = self.env.ref('beesdoo_base.commande_beescoop', raise_if_not_found=False)
-        # We do not need to update sale_order.mail_followers_ids, the link is automatic ?!
+        types = self.env['mail.message.subtype'].search([('res_model','=','purchase.order')])
+        
         if command_contact:
-            self.env['mail.followers'].create({'res_model' : 'purchase.order', 'res_id' : purchase_order.id, 'partner_id' : command_contact.id}) 
+            self.message_subscribe(partner_ids=command_contact, subtype_ids=types)
+            # self.env['mail.followers'].create({'res_model' : 'purchase.order', 'res_id' : purchase_order.id, 'partner_id' : command_contact.id}) 
+            
         return purchase_order