a, thank you so much for your detail info, anthony. i've tried it but still not work (no error occured), but what i'm expected to clear the session data is not achieve. i'm not sure why this is happened.
*#controller : default.py* def order_callback(): id=int(request.vars.id) if request.vars.action=='add': session.order[id]=session.order.get(id, 0)+1 if request.vars.action=='subtract': session.order[id]=max(0,session.order.get(id, 0)-1) if request.vars.action=='remove': del session.order[id] redirect(URL('order')) if request.vars.action=='reset': session.order.clear() redirect(URL('product'), client_side=True) return str(session.order[id]) *#view : order.html* <table width="100%"> {{for id, qty in order.items():}} {{p=db.product(id)}} <tr> <td>{{=SPAN(p.product_name)}}</td> <td>{{=SPAN('Rp. %s' % p.unit_price)}}</td> <td>{{=SPAN(qty, _id='item_%s' % p.id)}}</td> <td>{{=SPAN(A('Add', callback=URL('order_callback', vars=dict(id=p.id, action='add')), target='item_%s' % p.id, _title='Add Quantity', _class='btn btn-navbar'))}} {{=SPAN(A('Subtract', callback=URL('order_callback', vars=dict(id=p.id, action='subtract')), target='item_%s' % p.id, _title='Substract Quantity', _class='btn btn-navbar'))}} {{=SPAN(A('Remove', callback=URL('order_callback', vars=dict(id=p.id, action='remove')), delete='tr', _title='Remove %s from Order' % p.product_name, _class='btn btn-navbar'))}} </td> </tr> {{pass}} </table> {{=SPAN(A('Empty', callback=URL('order_callback', vars=dict(id=p.id, action='empty')), target='item_%s' % p.id, _title='Empty Order', _class='btn btn-navbar'))}} -- --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.