On Thursday, December 1, 2011 10:37:20 AM UTC-5, lyn2py wrote:
>
> Reply below
>
> On Dec 1, 11:15 pm, Anthony <[email protected]> wrote:
> > When the form is submitted, your function first checks if the user is
> > logged in -- if not, it never gets to the code that creates or processes
> > the form, so of course it can't execute your onvalidation function. Also,
>
> I think you just hit the nail. How can I intercept the process?
>
You could check for login after creating the form but before processing it,
and if not logged in, still return the form, with the flash message.
> > 'onvalidation' should be a function, not a call to a function (i.e., just
> > validate_session, not validate_session()).
>
> I used validate_session initially and it gave me an error...
> >> TypeError: validate_session() takes no arguments (1 given)
> so I added the (), no error. *puzzled*
>
An onvalidation function takes the form itself as an argument, so you have
to define a function that takes a form as an argument.
> > Also, note that adding an "_onsubmit" attribute to SQLFORM will end up
> > adding an "onsubmit" attribute to the HTML <form> tag, so the value of
> that
> > attribute should be a Javascript string to be executed on the client
> side,
> > not a Python function. In that case, it should trigger an Ajax callback
> to
> > check login status, and the resulting behavior will have to be handled
> > client side (either flashing the message or proceeding with submitting
> the
> > form).
>
> I used a simple Javascript function for this:
> <script type="text/javascript">
> <!--
> function validate_session(){
> return false
> }
> //-->
> </script>
>
> It works when the user is logged in (nothing is submitted)
> But it fails when the user session expires
>
But the above will never let the form submit because it doesn't actually
check if the user is logged in -- it just stops the submission in every
case. Instead, the function would have to make an Ajax call to the server
to check for login, and depending on the returned result, it would either
submit the form or prevent submission and flash a message.
Anthony
