I actually tried to solve the problem by using OGNL.
<s:iterator value="myGroups">
Group name: <s:property value="name"/>
Size: <s:property value='members.size()'/> members
</s:iterator>
In my second attempt, I called a non-property method:
In JSP:
...
Size: <s:property value='membersSize()'/> members
...
In POJO:
@Transient
public int getMembersSize() {
return members.size();
}
In both cases I ended up with a LazyInitializationException.
[seepo] ERROR [btpool0-1] LazyInitializationException.<init>(19) | failed to
lazily initialize a collection of role: org.seepo.model.Group.members, no
session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a
collection of role: org.seepo.model.Group.members, no session or session was
closed
Any idea? Your link to the page which describes JSTL functions says that
these functions are for String manipulations. I did not try it, but I guess,
they won't work with collections, will they?
Martin
mraible wrote:
>
> You should be able to get members.size() if you use OGNL and a
> <s:property> tag. You can also use JSTL functions and the "length"
> function.
>
> http://java.sun.com/j2ee/1.4/docs/tutorial-update2/doc/JSTL8.html
>
> Matt
>
> On Mon, Apr 28, 2008 at 9:16 AM, Martin Homik <[EMAIL PROTECTED]> wrote:
>>
>> Problem:
>> * I have a "Group" POJO which keeps a list of its "members" (ManyToMany
>> relation).
>> * The GroupAction class stores a list of my current groups and it has a
>> group field for
>> accessing information of a single group. In principle, the stucture
>> is
>> very similar to the
>> PersonAction of the online tutorial.
>>
>> Question: In the JSP, I iterate through the groups and print some group
>> information. For each group, I'd like to print the number of members.
>> How do
>> I get it? Can I access somehow members.size() in the JSP? Or am I on a
>> completely wrong path?
>>
>> Note: I tried a few things by try-and-error and sometimes I ended up
>> with a
>> Hibernate LazyInitializationException. Now, I just don't know at what
>> end to
>> continue? Is it something that
>> i) can be solved simply via JSP and some expression, or
>> ii) do I have to do something in the Action class, or
>> iii) does it go further down into the persistence layer?
>>
>> Hope, my mail is not too short and you understand my problem.
>> --
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>>
>>
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