Picking Status

for record in self:
  if record.delivery_count > 0:
    record['x_delivery_status'] = 'draft'
  else:
    global_done = False
    for picking in record.picking_ids.sorted(key=lambda r: r.id):
      local_done = False
      if picking.state in ['waiting','confirmed']:
        record['x_delivery_status'] = 'waiting'
      if picking.state in ['assigned']:
        record['x_delivery_status'] = 'ready'
      if picking.state in ['done']:
        record['x_delivery_status'] = 'partial'
        local_done = True
      if not global_done and local_done:
        global_done = True
      if global_done and not local_done:
        global_done = False
    if global_done:
      record['x_delivery_status'] = 'done'
      
      
      
      
      
      
      
      
      
      
      
      
#draft  	Not Confirmed
#waiting	Waiting
#ready	  Ready
#partial	Partially Delivered
#done	    Fully Delivered

#dependencies: 	picking_ids.state