dymanically create datatable and column

[guiltyxsin]

Hi all,

I want to dymanically create tables and within each table I also dymanically create columns.

I am not sure if I am implementing it the correct way.
The following is my html code:

<a4j:repeat value="#{testlist}" var="tlist">

<rich:dataTable value="#{tlist}" var="t" border="1" width="450"
onRowMouseOver="this.style.backgroundColor='#F1F1F1'"
onRowMouseOut="this.style.backgroundColor='#{a4jSkin.tableBackgroundColor}'">

 <f:facet name="header">
 <h:outputText value="#{tlist.name}" /> </f:facet>

 <rich:column>
 <f:facet name="header">
 <h:outputText value="Date" /> </f:facet>
 </rich:column>

 <a4j:repeat value="#{tlist.params}" var="p">
 <rich:column>
 <f:facet name="header">
 <h:outputText value="p.paramname" /> </f:facet>
 </rich:column>
 </a4j:repeat>

</rich:dataTable>

</a4j:repeat>

The testlist is a list of test:

public class Test {

 private String name;
 private List<ParamColumn> params;

 public String getName() {return name;}
 public void setName(String name) { this.name = name; }

 public List<ParamColumn> getParams() {return params;}
 public void setParams(List<ParamColumn> params) {this.params=params;}
}

And for the ParamColumn :

public class ParamColumn {
 String paramname;

 public String getParamName() { return paramname; }
 public void setParamName(String param) { this.paramname=param; }
}

The result is a list of tables with correct header but only one column "Date" and didn't create any other columns with paramname as header.

Is it possible to do it?
Thanks for any suggestions in advance!!

Regards,
Andy

[guiltyxsin]

Any suggestions on how to accomplish this?

The repeater for the columns didn't work and I have no idea if there's any other way to dynamically create columns with the table.

Regards,
Andy

[ilya_shaikovsky]

use rich:columns component or just dataTable binding.

[guiltyxsin]

Thanks for the suggestion.

I can't use rich:column because I want to dynamically create columns so if I add one more parameter in the database I don't need to change the html page.

Can this be achieved through dataTable binding? How should I do it?

Regards,
Andy

[raog0000]

Ilya Shaikovsky is suggesting rich:columns; not rich:column. We have been using it very successfully for creating datatables with dynamic columns. Here is the richfaces demo link http://livedemo.exadel.com/richfaces-demo/richfaces/columns.jsf?c=columns
.

[shadowcreeper]

For some reason rich:columns does not work when nested inside an a4j:repeat or a ui:repeat.

Is there a known workaround other than using c:forEach?

[vlad.kamensky]

"shadowcreeper" wrote:
For some reason rich:columns does not work when nested inside an a4j:repeat or a ui:repeat.

Is there a known workaround other than using c:forEach?

Why do you need to repeat "rich:columns" whose purpose is to build columns dynamically ? Please note, that "rich:columns" builds dynamically multiple "rich:column" elements.

[shadowcreeper]

Sorry for not being specific enough on my previous post.

Why do you need to repeat "rich:columns" whose purpose is to build columns dynamically ? Please note, that "rich:columns" builds dynamically multiple "rich:column" elements.

Because they are inside a repeated dataTable:

<a4j:repeat>
 <rich:dataTable>
 <rich:columns/>
 </rich:dataTable>
</a4j:repeat>

However, if you had a list of lists which you didn't want to merge for whatever reason, then you might want to repeat them in the same rich:dataTable (I just don't need this here).

[vlad.kamensky]

"shadowcreeper" wrote:

However, if you had a list of lists which you didn't want to merge for whatever reason, then you might want to repeat them in the same rich:dataTable (I just don't need this here).

OK, got it. You said that c:forEach works for your case, right ? Now you need to feel the difference between forEach and ui:repeat/a4j:repeat :
http://www.ilikespam.com/blog/c:foreach-vs-ui:repeat-in-facelets

As I understand, the c:forEach is an appropriate solution but it might not work in some cases (see a link). As for ui:repeat, it probably does not correlate well with rich:dataTable life cycle, though I have no exact answer why it is not working.