Great, many thanks again for the information. I bet others will find
it pretty handy too!
On Mon, Jul 13, 2009 at 9:23 PM, Musachy Barroso<musa...@gmail.com> wrote:
> you can sue that notation anywhere. A tip that will save you a lot of
> time, always wrap the OGNl expressions with %{}, that's why the first
> hidden is not getting evaluated. The second one has an empty value
> because "goalToAchieve" is probably not pointing to anything.
>
> btw what #attr does is search for a value in all scopes (page,
> request, session , application)
>
> musahcy
>
> On Mon, Jul 13, 2009 at 5:57 PM, Dimitrios
> Christodoulakis<dimi....@gmail.com> wrote:
>> Thanks again for helping out Musachy,
>> I was wondering if there are any rules regarding when the notation you
>> suggested below can be used. it works perfectly for setting url
>> params.
>>
>> I was trying to use it (with struts2 tags) within a form (which is
>> within the display:column tag) to pass the value to an action:
>>
>> <display:column>
>> <s:form action="UpdateEntryForm">
>> <s:hidden name="mark" value="#attr.thisEntry.mark" />
>> <s:hiddenname="name" value="%{goalToAchieve.name}" />
>> <s:submit value="Edit"/>
>> </s:form>
>> </display:column>
>>
>> This creates an "Edit" button in each row for every object I iterate
>> over, and I hoped to use the s:hidden tag to populate the underlying
>> UpdateEntryForm action. I also try to test it by printing from the
>> execute method as listed below, but the console output is just the
>> literal for the mark and zero for the primitive:
>>
>> This id is: 0
>> This name is: #attr.thisEntry.mark
>>
>> My action class:
>>
>> public class UpdateEntryForm extends ActionSupport{
>> public String execute(){
>> System.out.println("This id is: "+ getId());
>> System.out.println("This name is: "+ getMark());
>> return SUCCESS;
>> }
>> private String name;
>> private long mark;
>> public String getName() {
>> return name;
>> }
>> public void setName(String name){
>> this.name = name;
>> }
>>
>> public String getMark() {
>> return mark;
>> }
>> public void setMark(String mark){
>> this.mark = mark;
>> }
>> }
>>
>> Is there something wrong with the code above? Thanks again!
>>
>> On Mon, Jul 13, 2009 at 2:03 PM, Musachy Barroso<musa...@gmail.com> wrote:
>>> The current row used by displaytag is pushed under the name set in
>>> uid, so you could do this:
>>>
>>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>>> <display:column>
>>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>>> <s:param name="date" value="#attr.thisGoal.mark" />
>>> </s:url>
>>> ">Remove</a>
>>> </display:column>
>>>
>>> musachy
>>>
>>> On Mon, Jul 13, 2009 at 11:17 AM, Dimitrios
>>> Christodoulakis<dimi....@gmail.com> wrote:
>>>> Thanks. So, if I wanted to access a particular property (say this
>>>> property is called mark) of an "entry" object which I am iterating
>>>> over, I would do something like the following:
>>>>
>>>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>>>> <display:column property="entry" />
>>>> <display:column property="date" sortable="true"
>>>> defaultorder="ascending" title="TimeStamp"/>
>>>> <display:column property="mark" />
>>>> <display:column>
>>>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>>>> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>> <s:param name="id" value="%{goalToAchieve.id}" />
>>>> <s:param name="date" value="#attr.entry.mark" />
>>>> </s:url>
>>>> ">Remove</a>
>>>> </display:column>
>>>>
>>>> So, I could pass mark as a url param via s:url within the display tag?
>>>>
>>>> Thanks for the information!
>>>>
>>>> On Mon, Jul 13, 2009 at 1:08 PM, Musachy Barroso<musa...@gmail.com> wrote:
>>>>> Assuming that each entry is named "entry" by displayTag, you can
>>>>> access it using "#attr.entry" (or "#attr['entry']") to access it from
>>>>> the S2 tags.
>>>>>
>>>>> musachy
>>>>>
>>>>> On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
>>>>> Christodoulakis<dimi....@gmail.com> wrote:
>>>>>> Yes, that is exactly the case, hmm.. Although, how is the
>>>>>> display:table tag finds the collection in the first place?
>>>>>>
>>>>>> Supposedly the display has some way of reaching the valuestack, it can
>>>>>> even resolve the deeper notation <display:table
>>>>>> name="goalToAchieve.entries"
>>>>>>
>>>>>> However, I will switch back to s:iterator to test if the syntax
>>>>>> suggested will work. I mainly used the display tag as a quick way to
>>>>>> sort the collection, but if I can't access the properties of the
>>>>>> objects I am iterating over, it isn't of much use in this case
>>>>>>
>>>>>> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<greg.lindh...@gmail.com>
>>>>>> wrote:
>>>>>>> OK, I see the problem now... you are not using <s:iterator> to go thru
>>>>>>> the
>>>>>>> entries, you are using <display:table>.
>>>>>>>
>>>>>>> The syntax suggested will not work since <display:table> does not know
>>>>>>> anything about the value stack.The <s:param name="mark" value="%{mark}"
>>>>>>> />
>>>>>>> uses the value stack to resolve 'mark' which will not work here, you
>>>>>>> will
>>>>>>> need to replace %{mark} with the right syntax to work with
>>>>>>> <display:table>
>>>>>>> iterator.
>>>>>>>
>>>>>>> And I don't know anything about <display:table> so you will need to
>>>>>>> look up
>>>>>>> how to access the properties of the entities you are iterating over so
>>>>>>> as to
>>>>>>> build the URL.
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>>>>>>> dimi....@gmail.com> wrote:
>>>>>>>
>>>>>>>> I made the changes, but the view source indicates that the param
>>>>>>>> "mark" is not passed.
>>>>>>>>
>>>>>>>> The url linked is formed like this:
>>>>>>>>
>>>>>>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>>>>>>
>>>>>>>> The name and id params are fields of the parent object, the one
>>>>>>>> containing the collection.
>>>>>>>>
>>>>>>>> Actually, I tried with all fields taken from the collection object,
>>>>>>>> like entry, and date but none gets passed as a param. Only properties
>>>>>>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>>>>>>> able to point to a field within a collection object too?
>>>>>>>>
>>>>>>>> It looks like individual collection object properties can be viewed
>>>>>>>> using the iterator/display, but cannot be "captured" or passed as
>>>>>>>> parameters for any other uses... unless I am missing something, or
>>>>>>>> doing something wrong.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg
>>>>>>>> Lindholm<greg.lindh...@gmail.com>
>>>>>>>> wrote:
>>>>>>>> > Looks like you need to change entry.mark to just mark and remove the
>>>>>>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass
>>>>>>>> > both
>>>>>>>> > the name and id of the parent object.
>>>>>>>> >
>>>>>>>> > <a href="<s:url action='DeleteEntryForm' var="entry"
>>>>>>>> > escapeAmp="false">
>>>>>>>> > <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>>>> > <s:param name="mark" value="%{mark}" />
>>>>>>>> > </s:url>
>>>>>>>> > ">Remove</a>
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>>>>>>> > dimi....@gmail.com> wrote:
>>>>>>>> >
>>>>>>>> >> Thanks for letting me know. Alright, so:
>>>>>>>> >>
>>>>>>>> >> This is the parent class:
>>>>>>>> >>
>>>>>>>> >> @Entity
>>>>>>>> >> public class GoalToAchieve {
>>>>>>>> >> @Id @GeneratedValue
>>>>>>>> >> private Long id;
>>>>>>>> >>
>>>>>>>> >> @org.hibernate.annotations.CollectionOfElements
>>>>>>>> >> @JoinTable (name="GoalToAchieve_entry",
>>>>>>>> >> joincolum...@joincolumn(name="goalToAchieve_id"))
>>>>>>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>>>>>>> >>
>>>>>>>> >> public Set<JournalEntry> getEntries() {
>>>>>>>> >> return entries;
>>>>>>>> >> }
>>>>>>>> >> public void setEntries(SortedSet<JournalEntry> entries) {
>>>>>>>> >> this.entries = entries;
>>>>>>>> >> }
>>>>>>>> >>
>>>>>>>> >> public void addEntry(JournalEntry newEntry){
>>>>>>>> >> entries.add(newEntry);
>>>>>>>> >> }
>>>>>>>> >>
>>>>>>>> >> public void deleteEntry(JournalEntry entry){
>>>>>>>> >> entries.remove(entry);
>>>>>>>> >> }
>>>>>>>> >> ..plus some other standard fields with getters and setters
>>>>>>>> >>
>>>>>>>> >> This is the child-class:
>>>>>>>> >>
>>>>>>>> >> @Embeddable
>>>>>>>> >> public class JournalEntry {
>>>>>>>> >> @org.hibernate.annotations.Parent
>>>>>>>> >> private GoalToAchieve goalToAchieve;
>>>>>>>> >>
>>>>>>>> >> @Column
>>>>>>>> >> private Long mark;
>>>>>>>> >> public Long getMark() {
>>>>>>>> >> return mark;
>>>>>>>> >> }
>>>>>>>> >> public void setMark(long mark){
>>>>>>>> >> this.mark = mark;
>>>>>>>> >> }
>>>>>>>> >>
>>>>>>>> >> @Column(length = 255, nullable = false)
>>>>>>>> >> private String entry;
>>>>>>>> >>
>>>>>>>> >> @Temporal(TemporalType.TIMESTAMP)
>>>>>>>> >> @Column(nullable = false, updatable = false)
>>>>>>>> >> private Date insertDate = new Date();
>>>>>>>> >>
>>>>>>>> >> ..plus the rest getters and setters
>>>>>>>> >>
>>>>>>>> >> And this this the jsp part where I display the collection:
>>>>>>>> >>
>>>>>>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>>>>>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>>>>>>> uid="thisGoal">
>>>>>>>> >> <display:column property="entry" />
>>>>>>>> >> <display:column property="date" sortable="true"
>>>>>>>> >> defaultorder="ascending" title="TimeStamp"/>
>>>>>>>> >> <display:column property="mark" />
>>>>>>>> >> <display:column>
>>>>>>>> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>>>> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}"
>>>>>>>> >> />
>>>>>>>> >> <s:param name="mark" value="#mark" />
>>>>>>>> >> </s:url>
>>>>>>>> >> ">Edit</a>
>>>>>>>> >> </display:column>
>>>>>>>> >> <display:column>
>>>>>>>> >> <a href="<s:url action='DeleteEntryForm' var="entry"
>>>>>>>> >> escapeAmp="false">
>>>>>>>> >> <s:param name="name"
>>>>>>>> >> value="%{goalToAchieve.owner.fullName}" />
>>>>>>>> >> <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>>>> >> <s:param name="mark" value="entry.mark" />
>>>>>>>> >> <s:property value="%{entry}"/>
>>>>>>>> >> </s:url>
>>>>>>>> >> ">Remove</a>
>>>>>>>> >> </display:column>
>>>>>>>> >> </display:table>
>>>>>>>> >> </s:if>
>>>>>>>> >>
>>>>>>>> >> ..and the delete action, which should take an entry reference and
>>>>>>>> >> remove it from the collections looks like this:
>>>>>>>> >>
>>>>>>>> >> public class DeleteEntry extends ActionSupport{
>>>>>>>> >> public String execute(){
>>>>>>>> >> goalToAchieve.deleteEntry(entry);
>>>>>>>> >>
>>>>>>>> >> return SUCCESS;
>>>>>>>> >> }
>>>>>>>> >>
>>>>>>>> >> private JournalEntry entry;
>>>>>>>> >> private GoalToAchieve goalToAchieve;
>>>>>>>> >> private long id;
>>>>>>>> >>
>>>>>>>> >> ... + getters and setters
>>>>>>>> >>
>>>>>>>> >> I guess right now, my problem has become how to pass a parameter
>>>>>>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>>>>>>> >> would do a lookup within the action to find the entry object and
>>>>>>>> >> remove it from the parent object collection, by calling
>>>>>>>> >> deleteEntry(JournalEntry entry)
>>>>>>>> >>
>>>>>>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg
>>>>>>>> >> Lindholm<greg.lindh...@gmail.com>
>>>>>>>> >> wrote:
>>>>>>>> >> > You are not providing enough information for anyone to help you.
>>>>>>>> >> > Since
>>>>>>>> >> you
>>>>>>>> >> > have changed your object and the jsp you had better include them
>>>>>>>> >> > with
>>>>>>>> any
>>>>>>>> >> > request.
>>>>>>>> >> >
>>>>>>>> >> >
>>>>>>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>>>>>>> >> > dimi....@gmail.com> wrote:
>>>>>>>> >> >
>>>>>>>> >> >> Yes, that is a great suggestion actually. What I did was to add
>>>>>>>> >> >> a new
>>>>>>>> >> >> field based
>>>>>>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>>>>>>> >> >> parameter.
>>>>>>>> >> >>
>>>>>>>> >> >> For example, I am trying to add it as a url parameter below:
>>>>>>>> >> >>
>>>>>>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>>>> >> >> <s:param name="mark" value="%{mark}" />
>>>>>>>> >> >> </s:url>
>>>>>>>> >> >> ">Edit</a>
>>>>>>>> >> >>
>>>>>>>> >> >> But, the only param passed is the fullName. The mark is not
>>>>>>>> >> >> added to
>>>>>>>> >> >> the url string. I think this is because the only object
>>>>>>>> >> >> available on
>>>>>>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>>>>>>> >> >> reference as deep as the "entries" collection. But not to fields
>>>>>>>> >> >> of
>>>>>>>> >> >> each entry object. In other words, the display or iterator help
>>>>>>>> >> >> me
>>>>>>>> >> >> view the collection objects, but not extract and use any of their
>>>>>>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>>>>>>> >> >> something wrong.
>>>>>>>> >> >>
>>>>>>>> >> >
>>>>>>>> >>
>>>>>>>> >> ---------------------------------------------------------------------
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>>>>>>>> >> For additional commands, e-mail: user-h...@struts.apache.org
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> >
>>>>>>>>
>>>>>>>> ---------------------------------------------------------------------
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>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
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>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>>>>
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>>>>>
>>>>>
>>>>
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>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>>
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>>>
>>
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>>
>
>
>
> --
> "Hey you! Would you help me to carry the stone?" Pink Floyd
>
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