Yes, you can have multiple return statements in different logic branches of
a function.
Anthony
On Friday, February 15, 2013 11:44:02 AM UTC-5, 黄祥 wrote:
>
> thank you so much for your detail explaination about the differnce logic,
> anthony.
> according to your explaination about return so that i've modified into :
>
> *#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 locals()*
> return str(session.order[id])
>
> is the logic above is correct? i mean there is two return types in 1
> definition, is it allowed? i've already tested it, it can work same like
> using redirect, if it not correct or not allowed, should i create into the
> different definition like :
>
> *#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])
>
> def order_remove():
> id=int(request.vars.id)
> del session.order[id]
> return locals()
>
> *#**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_remove', vars=dict(id=p.id)), delete='tr',
> _title='Remove Product', _class='btn btn-navbar'))}}*</td>
> </tr>
> {{pass}}
> </table>
>
> both are work, i've already test it.
>
> thank you
>
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