Thank you for the information. That ofnl expression actually worked.
The textfield is populated with the value taken from the URL
parameter.
But something strange happens when I try to put more parameters on the request:
<s:url action="edit" var="editURL">
<s:param name="id" value="%{id}" />
<s:param name="firstName" value="%{firstName}" />
<s:param name="lastName" value="%{lastName}" />
</s:url>
So the link forms like this:
http://localhost/MyApp/edit.action?id=38&firstName=john&lastName=doe
Next, on the update page, I try to retrieve not only the id, but the
first name and last name too from the URL (in order to pre-fill the
textfields):
<s:form action="save">
<s:textfield name="person.firstName"
value="%{#parameters.firstName}" label="First Name"/>
<s:textfield name="person.lastName"
value="%{#parameters.lastName}" label="Last Name"/>
<s:hidden name="person.id" value="%{#parameters.id}"
label="Primary Key" />
<s:submit/>
</s:form>
Although ognl correctly picks up the first parameter (id), takes its
value and populates the hidden field, I get 2 ognl warnings: one for
the first name and one for the last name:
WARN OgnlValueStack:49 - Error setting value
ognl.ExpressionSyntaxException: Malformed OGNL expression:
amp;firstName [ognl.TokenMgrError: Lexical error at line 1, column 4.
Encountered: ";" (59), after : ""]
WARN OgnlValueStack:49 - Error setting value
ognl.ExpressionSyntaxException: Malformed OGNL expression:
amp;lastName [ognl.TokenMgrError: Lexical error at line 1, column 4.
Encountered: ";" (59), after : ""]
A look at how the URL forms confirms this: Instead of adding the
parameters in URL using just a "&", parameters are separated by this:
"&"
--Is that some sort of bug when evaluating multiple struts2 param tags
with ognl, or do I have something wrong in the jsp code?
The actual action ode works ok, I believe the issue is within that jsp only.
Again, I appreciate any further advice on this.
Regards to everyone.
On Fri, Jun 5, 2009 at 9:32 PM, Dave Newton<newton.d...@yahoo.com> wrote:
> Dimitrios Christodoulakis wrote:
>>
>> <s:hidden name="person.id" value="#attr.id" label="Primary Key" />
>
> I told you #attr.id on javaranch; I meant #parameters. This information is
> readily available via the S2 docs. [1, 2]
>
> IIRC the "value" attribute expects a literal; I'd wrap it in the OGNL
> escape, %{#parameters.id}, to make sure it's evaluated. Correct rendering
> is, of course, trivially verifiable by viewing the rendered source.
>
> The fact remains that if person.id isn't being filled correctly by your Java
> code something is still wrong with it.
>
>> I have also tried unsuccessfully to retrieve the parameter value
>> from the action code, but always get null.
>
> If I'm understanding what you're saying there then something is doubly wrong
> with either your config or your assumptions: there are several ways to
> retrieve URL parameters, and AFAIK they all work.
>
> Note that the result named "SUCCESS" will never be used if you're using the
> ActionSupport convenience result constants.
>
> Dave
>
> [1] OGNL
> http://struts.apache.org/2.x/docs/ognl.html
>
> [2] OGNL Basics
> http://struts.apache.org/2.x/docs/ognl-basics.html
>
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