[jboss-user] [JBoss Seam] - Re: seam s:link fetchs list multiple times. big error !

[bulloncito]

Didn't wanted to bloat the post, but it happens with every dataTable I have, wheter they use query objects, my own custom beans, or even bean.property of type list, they all get queryed again for every s:link in every row (of a h:dataTable).

Here's a quick sample, the COMPLETE page list-regions.xhtml:


  | <!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  | <ui:composition xmlns="http://www.w3.org/1999/xhtml"
  | 	xmlns:c="http://java.sun.com/jstl/core"
  | 	xmlns:ui="http://java.sun.com/jsf/facelets"
  | 	xmlns:h="http://java.sun.com/jsf/html"
  | 	xmlns:f="http://java.sun.com/jsf/core"
  | 	xmlns:s="http://jboss.com/products/seam/taglib"
  | 	xmlns:a="https://ajax4jsf.dev.java.net/ajax"
  | 	template="/template.xhtml">
  | 
  | <!-- content -->
  | <ui:define name="content">
  | 
  | <div class="section">
  |     <span class="errors">
  |        <h:messages globalOnly="true"/>
  |     </span>
  | 	<h1>#{messages.list_regions_label}</h1>
  | </div>
  | 
  |   <div class="section">
  | 	<h:dataTable id="regions" value="#{regions.resultList}" var="region" rowClasses="row0,row1" >
  | 		<h:column rendered="#{s:hasRole('Debug')}">
  | 			<f:facet name="header">id</f:facet>
  | 			#{region.id}
  | 		</h:column>
  | 		<h:column>
  | 			<f:facet name="header">#{messages.region_name_label}</f:facet>
  | 			#{region.name}
  | 		</h:column>
  | 		<h:column>
  | 			<f:facet name="header">#{messages.region_options_label}</f:facet>
  | 			
  | 			<s:link propagation="none" view="/register/register-region.xhtml" style="text-decoration: none">
  | 				<h:graphicImage url="/img/status_bullet/pencil_blue.gif" onmouseover="return escape('#{messages.region_edit_label}');" styleClass="icon" />
  | 				<f:param name="selectedRegionId" value="#{region.id}" />
  | 			</s:link>
  | 		
  | 			<s:link propagation="join" view="/list/list-employees.xhtml" >
  | 				<h:graphicImage url="/img/status_bullet/avatars_blue.gif" onmouseover="return escape('#{messages.view_region_employees}');" styleClass="icon" />
  | 				<f:param name="selectedRegionId" value="#{region.id}" />
  | 			</s:link>
  | 			
  | 			<s:link propagation="join" view="/list/list-complexes.xhtml" >
  | 				<h:graphicImage url="/img/status_bullet/house_blue.gif" onmouseover="return escape('#{messages.view_region_complexes}');" styleClass="icon" />
  | 				<f:param name="selectedRegionId" value="#{region.id}" />
  | 			</s:link>
  | 			
  | 		</h:column>
  | 	</h:dataTable>
  |   </div>
  | 
  | </ui:define>
  | 
  | <!-- sidebar -->
  | <ui:define name="sidebar">
  | 	<ui:include src="/menu-simple.xhtml" />
  | </ui:define>
  | 
  | </ui:composition>
  | 

and the actual full entityQuery that does the work (it is the COMPLETE source, that's all):


  | @Name("regions")
  | public class RegionList extends EntityQuery {
  | 
  | 	@Logger Log log ;
  | 	
  |     @Override
  |     public String getEjbql() {
  | 		return "SELECT r FROM Region AS r WHERE r.active > 0 ORDER BY r.name " ;
  |     }
  |     
  |     @Override
  |     public List getResultList() {
  |     	log.debug("fetchin' list") ;
  |     	return super.getResultList() ;
  |     }
  | }
  | 

there are 16 entries on the database, it prints in the logs:

  | DEBUG [RegionList] fetchin' list
  | X 49
  | 
exactly 49 times, one for the table, one for each s:link (16*3+1), if I remove 1, 2, or the 3 s:links, then it prints 33 (16*2+1), 17 (16+1) and 1 (1 :P) times respectively. So, it's fetching again for each s:link on the table.

... this HAS to be an error. 

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