[Zope] Validating data entry (dates)

[Stuart 'Zen' Bishop]

On Thu, 9 Dec 1999, Henny van der Linde wrote:

> I have a date field. I want to check, before submitting the form, if the
> date entered is valid.
> Is there someting like a function as: Date.IsValid (I haven a Delphi
> background). What I don't want is a Zope generated standard error screen. I
> want a custom designed error message/page.

There are two options really:
    1) Write nifty JavaScript to validate at the client before submitting
       to the server. This code doesn't exist in a general Zope form,
       but lots of us would like it :-)

    2) Use <dtml-try> <dtml-except> clauses in the DTML method that
       accepts your form input, so if an exception is thrown converting
       a submitted string to a date, for instance, you can display a nice
       error message.

-- 
 ___
   //     Zen (alias Stuart Bishop)     Work: zen@cs.rmit.edu.au
  // E N  Senior Systems Alchemist      Play: zen@shangri-la.dropbear.id.au
 //__     Computer Science, RMIT 	 WWW: http://www.cs.rmit.edu.au/~zen