In the second and third cases, you delete session.order[id] but then try to
return it, which will generate an error (so the response to the Ajax call
will be a 500 error). This doesn't happen in the first case because the
redirect happens before the return.
Anthony
On Thursday, February 14, 2013 10:36:24 PM UTC-5, 黄祥 wrote:
>
> hi,
>
> i'm trying to delete session using del session, and found strange
> behaviour
>
> for example
> *#**views/default/order.html*
> <table width="100%">
> {{for id, qty in order.items():}}
> {{p=db.product(id)}}
> <tr>
> <td>{{=p.product_name}}</td>
> <td>Rp. {{=p.unit_price}}</td>
> <td><span id="{{='item%s'%p.id}}">{{=qty}}</span>
> {{=SPAN(A('+', callback=URL('order_callback', vars=dict(id=p.id,
> action='add')), target='item%s'%p.id, _title='Add Product', _class='btn
> btn-navbar'))}} {{=SPAN(A('-', callback=URL('order_callback', vars=dict(id=
> p.id, action='subtract')), target='item%s'%p.id, _title='Substract
> Product', _class='btn btn-navbar'))}} *{{=SPAN(A('X',
> callback=URL('order_callback', vars=dict(id=p.id, action='remove')),
> delete='tr', _title='Remove Product', _class='btn btn-navbar'))}}*</td>
> </tr>
> {{pass}}
> </table>
> *
> work*
> *#controllers/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('product'))*
> return str(session.order[id])
> *
> not work*
> *#controllers/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]*
> * session.flash=T("Order Deleted!!!")*
> return str(session.order[id])
> *
> not work*
> *#controllers/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]*
> return str(session.order[id])
>
> my question is it normal, or there is something error or lack in my code?
>
> thank you so much before
>
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