So what is the outcome of this discussion? :P
Also, I think I'm going to add a helper object to the AC like so:
"#p.foo" - causes action.getFoo() to be called, and if the return value
is null (or default) then it will call request.getParameter("foo"). That
would solve Mike's 'abc' example if all the UI tags used that technique.
-Pat
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Jason Carreira
Sent: Friday, December 12, 2003 8:20 AM
To: [EMAIL PROTECTED]
Subject: RE: [OS-webwork] Empty string property now "" instead of null?
Well, fucked is a little strong... You can (and someone should, just not
me :-) ) create UI templates that will access the type conversion error
map to get the submitted values which could not be converted and
re-display them.
> -----Original Message-----
> From: Mike Cannon-Brookes [mailto:[EMAIL PROTECTED]
> Sent: Friday, December 12, 2003 5:30 AM
> To: [EMAIL PROTECTED]
> Subject: Re: [OS-webwork] Empty string property now ""
> instead of null?
>
>
> Well, that's why we almost always use Strings for critical
> data - data conversion (like ints has many problems).
>
> Chief among them IMHO is that if you have a textfield backed
> by a get/set int method, and someone submits 'abc' - you're
> fucked (regardless of whether it sets null, 0, -1 or any
> other value) :)
>
> (see Jason's mail a while ago about data conversion errors etc)
>
> M
>
> On 12/12/03 9:20 PM, "BOGAERT Mathias"
> ([EMAIL PROTECTED]) penned the
> words:
>
> > That is indeed a problem, but why would this be interesting
> to know? I
> > expect WebWork not to call any setters on my action (to set fields)
> > when the form field is not filled (empty).
> >
> > Also, if empty String resolves to "", why an empty Integer
> to null and
> > not new Integer(0)?
> >
> > Mathias
> >
> > -----Original Message-----
> > From: Mike Cannon-Brookes [mailto:[EMAIL PROTECTED]
> > Sent: vrijdag 12 december 2003 11:15
> > To: [EMAIL PROTECTED]
> > Subject: Re: [OS-webwork] Empty string property now "" instead of
> > null?
> >
> >
> > _exactly_ - you put it perfectly mate.
> >
> > So how do you tell the difference between a parameter, and not a
> > parameter? (ie the text field never existed on the form at all) :)
> >
> > Cheers,
> > Mike
> >
> > On 12/12/03 8:59 PM, "BOGAERT Mathias"
> ([EMAIL PROTECTED]) penned
> > the
> > words:
> >
> >> The problem here is that a HTML form ALWAYS submits parameters as
> >> empty strings, you cannot 'not' send a parameter in.
> >>
> >> Mathias
> >>
> >> -----Original Message-----
> >> From: Dick Zetterberg [mailto:[EMAIL PROTECTED]
> >> Sent: vrijdag 12 december 2003 10:45
> >> To: [EMAIL PROTECTED]
> >> Subject: Re: [OS-webwork] Empty string property now "" instead of
> >> null?
> >>
> >>
> >> In WW1.3 and 1.4 a string parameter that is empty will set
> the string
> >> property to the empty string. Not null. If your program choose to
> >> interpret this as null that is up to you. How can you
> otherwise see
> >> the difference between a parameter that is not sent in at
> all and one
> >> that is sent in but is empty?
> >>
> >> Cheers,
> >>
> >> Dick Zetterberg
> >> [EMAIL PROTECTED]
> >>
> >> ----- Original Message -----
> >> From: "Lars Fischer" <[EMAIL PROTECTED]>
> >> To: <[EMAIL PROTECTED]>
> >> Sent: Thursday, December 11, 2003 12:38 PM
> >> Subject: Re: [OS-webwork] Empty string property now "" instead of
> >> null?
> >>
> >>
> >>> IMO it is essential that is is NULL. This has been a
> problem with WW
> >>> 1.2. and has been fixed in 1.3. It's perfectly legal for
> a String to
> >>> be null.
> >>>
> >>> If WW2 handles this as an empty String, it's a bug.
> >>>
> >>>> Hi,
> >>>>
> >>>> When a form field (single textfield) is not filled, the request
> >>>> param is an empty string, which translates to an empty
> string array
> >>>> (ParametersInterceptor), but my property setter is
> called with an
> >>>> empty string. Should't that be null?
> >>>>
> >>>> Cheers,
> >>>> Mathias
> >>
> >>
> >>
> >> -------------------------------------------------------
> >> This SF.net email is sponsored by: SF.net Giveback Program. Does
> >> SourceForge.net help you be more productive? Does it help
> you create
> >> better code? SHARE THE LOVE, and help us help YOU! Click Here:
> >> http://sourceforge.net/donate/
> >> _______________________________________________
> >> Opensymphony-webwork mailing list
> >> [EMAIL PROTECTED]
> >> https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
> >>
> >>
> >> -------------------------------------------------------
> >> This SF.net email is sponsored by: SF.net Giveback Program. Does
> >> SourceForge.net help you be more productive? Does it help
> you create
> >> better code? SHARE THE LOVE, and help us help YOU! Click Here:
> >> http://sourceforge.net/donate/
> >> _______________________________________________
> >> Opensymphony-webwork mailing list
> >> [EMAIL PROTECTED]
> >> https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
> >
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: SF.net Giveback Program. Does
> > SourceForge.net help you be more productive? Does it help
> you create
> > better code? SHARE THE LOVE, and help us help YOU! Click Here:
> > http://sourceforge.net/donate/
> > _______________________________________________
> > Opensymphony-webwork mailing list
> > [EMAIL PROTECTED]
> > https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: SF.net Giveback Program. Does
> > SourceForge.net help you be more productive? Does it help
> you create
> > better code? SHARE THE LOVE, and help us help YOU! Click Here:
> > http://sourceforge.net/donate/
> > _______________________________________________
> > Opensymphony-webwork mailing list
> > [EMAIL PROTECTED]
> > https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: SF.net Giveback Program.
> Does SourceForge.net help you be more productive? Does it
> help you create better code? SHARE THE LOVE, and help us
> help YOU! Click Here: http://sourceforge.net/donate/
> _______________________________________________
> Opensymphony-webwork mailing list
> [EMAIL PROTECTED]
> https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
>
-------------------------------------------------------
This SF.net email is sponsored by: SF.net Giveback Program.
Does SourceForge.net help you be more productive? Does it
help you create better code? SHARE THE LOVE, and help us help
YOU! Click Here: http://sourceforge.net/donate/
_______________________________________________
Opensymphony-webwork mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
-------------------------------------------------------
This SF.net email is sponsored by: IBM Linux Tutorials.
Become an expert in LINUX or just sharpen your skills. Sign up for IBM's
Free Linux Tutorials. Learn everything from the bash shell to sys admin.
Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
_______________________________________________
Opensymphony-webwork mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
