thank you so much for your explaination, antony, i thought it was an
illegal operation in web2py work flow or programming logic. but some times
it's wise to decide it whether use redirect or return locals(), or is there
any other options to do this except using redirect or return locals()?
here is the example that can not use return locals(), because when the
condition is true, it will return an error:
def bill():
if not session.order:
session.flash=T("Order Now!!!")
redirect(URL('product'))
for k, v in session.order.items():
if v==0:
del session.order[k]
* redirect(URL('order')) # if use return locals() an error will
occur*
import datetime
import uuid
invoice_no=str(datetime.date.today())+'-'+str(uuid.uuid4())
grand_total=sum(db.product(id).unit_price*qty for id, qty in
session.order.items())
form=SQLFORM.factory(Field('note', 'text'))
if form.accepts(request,session):
for key, value in session.order.items():
db.sale.insert(invoice_no=invoice_no,
product_id=key,
quantity=value,
unit_price=db.product(key).unit_price,
total_price=db.product(key).unit_price*value,
grand_total=grand_total,
note=form.vars.note)
db(db.product.id==key).update(quantity=db.product.quantity -
value)
session.order.clear()
session.flash=T("Thank you for your Order")
redirect(URL('invoice', args=invoice_no))
return dict(order=session.order, form=form, grand_total=grand_total)
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