the previous is not work, it's work first because it still store the 
previous session, after clean session, cache and error it's not work. 
something strange in here. 
e.g.
*controllers*
session.sale_order_net = session.sale_order_net or {}
#session.sale_order_net[0] = dict(discount = 0, delivery_fee = 0, 
packing_fee = 0, stamp_fee = 0, paid = 0)
session.sale_order_net[0] = 0, 0, 0, 0, 0

*modules*
if current.request.vars.action == 'adjust_total_net':
discount = int(current.request.vars['discount'] )
delivery_fee = int(current.request.vars['delivery_fee'] )
packing_fee = int(current.request.vars['packing_fee'] )
stamp_fee = int(current.request.vars['stamp_fee'] )
paid = int(current.request.vars['paid'] )

#current.session.sale_order_net[0] = dict(discount = discount, delivery_fee 
= delivery_fee, packing_fee = packing_fee, stamp_fee = stamp_fee, paid = 
paid) # not work

current.session.sale_order_net[0] = discount, delivery_fee, packing_fee, 
stamp_fee, paid # not work

whether i store the session as dict() or list it still not update, i'm not 
using the variable to represent the session in the module (explicit it the 
session name and place [0] ), n it still not update, no error traceback 
occured, but the result is not expected (check with response.toolbar() the 
value is still 0 )

i know i missed something but can't figure it out, any idea how to face 
this using web2py way?

thanks and best regards,
stifan

On Thursday, January 14, 2016 at 7:03:43 AM UTC+7, 黄祥 wrote:
>
> thank you so much for detail explaination, anthony. i found another way 
> around that work fine, don't know is this best practice or not because it 
> hard code to reserve the place in session variable. 
> like describe in the previous post, i want this module function can be 
> used by another functions in another controllers, so to explicit the 
> session is fine and then i must copy and rename the module function and 
> rename it's session name.
> e.g.
> *controllers/sale.py*
> if 'sale_order' in request.function :
> # session sale_order
> session.sale_order = session.sale_order or {}
> #session.sale_order_net = session.sale_order_net or dict(discount = 0, 
> delivery_fee = 0, packing_fee = 0, stamp_fee = 0, paid = 0)
> #session.sale_order_net = session.sale_order_net or {'discount':0, 
> 'delivery_fee':0, 'packing_fee':0, 'stamp_fee':0, 'paid':0}
> *session.sale_order_net = session.sale_order_net or {}*
> * session.sale_order_net[0] = dict(discount = 0, delivery_fee = 0, 
> packing_fee = 0, stamp_fee = 0, paid = 0)*
> #sale_order
> session_sale_order = session.sale_order
> session_sale_order_net = session.sale_order_net
>
> def sale_order_callback():
> return transaction.callback_0(session_sale_order, session_sale_order_net)
> *modules/transaction.py*
> def callback_0(session_order, session_order_net):
> if current.request.vars.action == 'adjust_total_net':
> discount = int(current.request.vars['discount'] )
> delivery_fee = int(current.request.vars['delivery_fee'] )
> packing_fee = int(current.request.vars['packing_fee'] )
> stamp_fee = int(current.request.vars['stamp_fee'] )
> paid = int(current.request.vars['paid'] )
>
> *session_order_net[0] = dict(discount = discount, delivery_fee = 
> delivery_fee, packing_fee = packing_fee, stamp_fee = stamp_fee, paid = 
> paid)*
>
> thanks and best regards,
> stifan
>
> On Thursday, January 14, 2016 at 1:58:07 AM UTC+7, Anthony wrote:
>>
>> Presumably you are calling this function as follows:
>>
>> callback_0(session.order, session.sale_order_net)
>>
>> The problem is you later have:
>>
>>     session_order_net = dict(...)
>>
>> At that point, you are not modifying the session.sale_order_net object 
>> but simply assigning a new object to the local variable session_order_net. 
>> This is equivalent to doing:
>>
>>     session_order_net = current.session.sale_order_net
>>     session_order_net = dict(...)
>>
>> In the above case, you wouldn't expect the second line to have any effect 
>> on session.sale_order_net -- the second line simply makes the first line 
>> irrelevant (i.e., it simply overwrites the value of the session_order_net 
>> variable that is local to the function).
>>
>> The earlier line:
>>
>>     session_order[id] = ...
>>
>> works because in that case, you are not assigning a new object to the 
>> session_order variable but merely mutating the object to which 
>> session_order refers (i.e., session.order).
>>
>> If you want to completely replace the value of session.sale_order_net, 
>> then pass in the session object and do:
>>
>>     session.sale_order_net = ...
>>
>> Anthony
>>
>>
>>
>>
>>
>> On Wednesday, January 13, 2016 at 12:48:11 AM UTC-5, 黄祥 wrote:
>>>
>>> is it possible to update 2 sessions values using web2py module? i've 
>>> tested it only first session value work, the second session value work if 
>>> explicit define in the module (but the module is used by another 
>>> controller, so i want to create just 1 module for all controllers).
>>> e.g.
>>> *modules/transaction.py*
>>> def callback_0(session_order, session_order_net):
>>> if current.request.vars.action == 'adjust_total':
>>> id = int(current.request.vars.id)
>>> quantity = int(current.request.vars['quantity_%s' % id])
>>> price = int(current.request.vars['price_%s' % id])
>>> *session_order[id] = quantity, price # the first parameter work*
>>> total_price = quantity * price
>>> total_quantity = 0
>>> grand_total = 0
>>> for calculation_id, (calculation_quantity, calculation_price) in 
>>> session_order.items():
>>> calculation_total_price = calculation_quantity * calculation_price
>>> total_quantity += calculation_quantity
>>> grand_total += calculation_total_price
>>> return "jQuery('#total_price_%s').html('%s'); 
>>> jQuery('#total_quantity').html('%s'); jQuery('#grand_total').html('%s');" % 
>>> (id, 
>>>   format(total_price, ",d").replace(",", "."), format(total_quantity, 
>>> ",d").replace(",", "."), 
>>>   format(grand_total, ",d").replace(",", ".") )
>>> if current.request.vars.action == 'adjust_total_net':
>>> discount = int(current.request.vars['discount'] )
>>> delivery_fee = int(current.request.vars['delivery_fee'] )
>>> packing_fee = int(current.request.vars['packing_fee'] )
>>> stamp_fee = int(current.request.vars['stamp_fee'] )
>>> paid = int(current.request.vars['paid'] )
>>>
>>> * current.session.sale_order_net = dict(discount = discount, 
>>> delivery_fee = delivery_fee, packing_fee = packing_fee, stamp_fee = 
>>> stamp_fee, paid = paid) # this work when explicit tell the session name*
>>>
>>> * #session_order_net = dict(discount = discount, delivery_fee = 
>>> delivery_fee, packing_fee = packing_fee, stamp_fee = stamp_fee, paid = 
>>> paid)** # the second parameter not work, no error traceback occured but 
>>> the result is not expected (not updated value)*
>>>
>>> grand_total = sum(calculation_quantity * calculation_price for 
>>> calculation_id, (calculation_quantity, calculation_price) in 
>>> session_order.items() )
>>> grand_total_net = grand_total-discount+delivery_fee+packing_fee+stamp_fee
>>> paid_return = paid-grand_total_net
>>>
>>> return "jQuery('#grand_total_net').html('%s'); 
>>> jQuery('#paid_return').html('%s');" % (
>>>   format(grand_total_net, ",d").replace(",", "."), format(paid_return, 
>>> ",d").replace(",", ".") )
>>>
>>> as in the example code above the bold code is work if i explicit it and 
>>> if i use the second parameter (*session_order_net*) that been passed by 
>>> function in controller, it is not work, the funny things is the first 
>>> parameter work (*session_order*). no error traceback occured but the 
>>> result is not expected.
>>>
>>> any idea how to get it work in web2py way?
>>>
>>> thanks and best regards,
>>> stifan
>>>
>>

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