Apex Code Development You need to sign in to do that
Don't have an account?
wsthesis Render Related List(s) only if a related record in the list exists
I'm trying to use visualforce to perform the following:
A. Show related lists (and all headings) only if a related record exists.
B. If a related record does not exist, the particular section is not displayed.
I'm trying to use the apex:relatedList tag with the rendered attribute.
Is it possible to check if the list is empty as a boolean expression within visualforce without having to create a custom controller method? I have a working solution, but if I want to add this functionality for all related lists, it's a lot of extra controller code to write.
Thanks in advance.
VisualForce View Page
<apex:page standardController="Account" extensions="AccountHiddenListController">
<apex:detail relatedList="false">
<apex:relatedList list="Opportunities" rendered="{!relatedOpportunitiesExist}">
</apex:relatedList>
</apex:detail>
</apex:page>
<apex:detail relatedList="false">
<apex:relatedList list="Opportunities" rendered="{!relatedOpportunitiesExist}">
</apex:relatedList>
</apex:detail>
</apex:page>
Controller Code:
public class AccountHiddenListController
{
private final Account account;
private boolean relatedOpportunitiesExist;
public AccountHiddenListController (ApexPages.StandardController accountController)
{
this.account = (Account) accountController.getRecord();
}
public boolean getRelatedOpportunitiesExist()
{
if (this.relatedOpportunitiesExist != null)
{
return this.relatedOpportunitiesExist;
}
List<Opportunity> opp = this.getOpportunitiesList();
if (opp.size() > 0)
{
this.relatedOpportunitiesExist = true;
}
else
{
this.relatedOpportunitiesExist = false;
}
return this.relatedOpportunitiesExist;
}
public void setRelatedOpportunitiesExist()
{
}
public List<Opportunity> getOpportunitiesList()
{
if (this.account == null)
return null;
return [select o.id
from Opportunity o
where o.AccountId = :account.id];
}
}
{
private final Account account;
private boolean relatedOpportunitiesExist;
public AccountHiddenListController (ApexPages.StandardController accountController)
{
this.account = (Account) accountController.getRecord();
}
public boolean getRelatedOpportunitiesExist()
{
if (this.relatedOpportunitiesExist != null)
{
return this.relatedOpportunitiesExist;
}
List<Opportunity> opp = this.getOpportunitiesList();
if (opp.size() > 0)
{
this.relatedOpportunitiesExist = true;
}
else
{
this.relatedOpportunitiesExist = false;
}
return this.relatedOpportunitiesExist;
}
public void setRelatedOpportunitiesExist()
{
}
public List<Opportunity> getOpportunitiesList()
{
if (this.account == null)
return null;
return [select o.id
from Opportunity o
where o.AccountId = :account.id];
}
}
Anybody have an update on this one?
The VF Developers Guide has an example, but it does not seem to work.
The example:
<apex:pageBlockTable value="{!results}" var="l"rendered="{!NOT(ISNULL(results))}">
I tried the ISNULL funtion and it did not work.
This is a bit of a cobbled together soloution but it can all be done inside the visualforce page without using any kind of custom apex controller
<apex:page standardController="Account" > <apex:repeat value="{!Account.Related_object__r}" var="temp" rows="1"> <div class="row"> <apex:relatedList list="Related_object__r"/> </div> </apex:repeat> </apex:page>Since the repeater is only returning one row you are able to disply the related list once...
I know how annoying this is and I spent a good 4 hours on this ;)
Cheers!
--
Ofrag
How about <apex:relatedList list="Related_object__r" rendered="{!Related_object__r.size > 0}"/>
Hey ,
On the standard detail page , I need a button that takes me to the detail record page of the Child record. I figured I could do this with a VF page
But Also want to create a new Child record if the Master doesnot have any child record.
I have been struggling for the last 3 days but cannot figure out a solution.
Please help.
Thanks in advance