Thanks, this works very well
________________________
Rodolfo Garc�a Esteban
Canal Isabel II
Divisi�n de Aplicaciones T�cnicas
C/ Santa Engracia, 125
Edificio 8
Tel. 91 545 10 00 - Ext. 2128
Fax. 91 545 14 41
_______________________
Erik Weber <[EMAIL PROTECTED]>
25/04/2005 09:33
Por favor, responda a "Struts Users Mailing List"
Para: Struts Users Mailing List <[email protected]>
cc: (cco: Rodolfo Garc�a Esteban/CYII)
Asunto: Re: How to Known if there error for a property
Rodolfo, I attached two posts from Joe, which you can see are from last
November. I am making some assumptions about your question (perhaps you
want to display the error message right on top of the input field in
addition to/rather than in a bulleted list at the top of the page), so I
apologize if I am on the wrong track.
If I recall, Niall has done a bunch of work in this area since that
time. Sorry but I haven't kept up with it very well. I think you should
wait for a post from Niall or Joe on this matter for a definitive answer
then. But this works. This subject comes up a lot, and I also am
interested in a nice solution. Right now I have a lot of JSPs with
logical switches for every field that include the line of code below or
something similar.
Hope this helps,
Erik
Rodolfo Garc�a Esteban/CYII wrote:
>Hi,
>
>I�m using struts 1.2.4, after validate a form. I need to know if there is
>a message for a property before print, how can I do?
>
>Thanks in advance,
>
>Rodolfo
>
>
>
At 3:49 PM -0600 11/8/04, Struts User wrote:
> Hello,
>
> Currently, I am using struts validator to validate the fields in my
> ActionForm.
>
> Before I updated to struts 1.2.4, I could add an error this way -
> errors.add(
> "username", new ActionError("error.username.required"));
>
> If the validation failed, the error message for username will be
> displayed right beside the user name text field if I use <P>Username:
> <html:text property="username"/></P>.
>
> Can someone tell me how to display error message beside an input field
> using struts validator?
I've never seen any automatic message placement. You can access
messages like this:
<html:messages property="username" id="msg"></html:messages>
html:messages is effectively a combination logic/iterator tag. If there
are any "username" messages in the ActionMessages object saved as the
"errors" messages, the body of html:messages will be evaluated once for
each, with a scripting variable of type String defined with the name
specified in the "id" attribute. You can use c:out or bean:write to
display this value, wrapped with span, div, or other tags which format
your messages correctly.
I kind of think someone talked on the list once about making something
which rendered an HTML "label" tag and which was also "smart" about the
presence of errors. I like the idea of something like that in general,
but wonder if you'd be able to specify something suitably general for
inclusion in Struts. Seems like it might be better left for local
development.
Joe
. . .
At 5:10 PM -0500 11/8/04, Erik Weber wrote:
> Here is a way to do it that works with 1.1:
>
> <logic:messagesPresent name="org.apache.struts.action.ERROR"
> property="username">
> <bean:message key="error.username.required"/>
> </logic:messagesPresent>
> <p>Username: <html:text property="username"/></p>
Omitting the "name" attribute in this would have the same effect as
including it - it's the default. It's suggested that if you are storing
messages in your actions using "saveErrors" or "saveMessages" (or
dealing with validation errors, which are stored as if using
"saveErrors") then you shouldn't specify "name" literally; instead, you
can either rely on the default (to get errors) or use the "message"
attribute with a value of "true" (to get saveMessages messages) or
"false" (to get errors -- that is, the default behavior). This helps to
"encapsulate" the logic of how Struts handles those messages, and makes
your JSP a bit less verbose also.
Additionally, your code above assumes that the nature of the error
message is such that you know that the user should be shown the
"error.username.required" message -- it's probably more flexible to let
the validation/error handling framework create an ActionMessage object
with that key itself, and then you would use the messages object; this
way if any other error should come up (say you add a max-length
restriction, or forbidden characters), then you don't have to change
your JSP.
In another response I demonstrated how html:messages can be used to
achieve the same result you had above, plus this added flexibility I
mention.
Some people still like to use "html:errors", which predates
html:messages and which has a slightly different syntax for providing
any HTML which might "wrap" your messages. Personally, I prefer
html:messages.
None of this changed from Struts 1.1 to Struts 1.2.
Hope this helps,
Joe
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