Hi there

I have a parent object (such as Applicant).

There are several related lists regarding the Applicant.  Such as Application History, Training History, Employment History, Education History, etc.  Applicant is the master and these 4 other things are the children to the Applicant custom object.

The use case is that when the client is looking at an applicant's application (there can be many applications, but let's say the client is viewing one of those applications, and the client wants to see the applicant's training history.

The client would like to have a custom link on the application record that says "Training History", and when clicked, a window will pop up that will display the applicant's training history.

At first I thought I would simply have a VF page that shows the training history of the applicant via <apex:relatedList>, and the page would use the applicant object as the standard controller.  I thought that would be really easy!

<apex:page standardController="Applicant__c">
  <apex:relatedList list="TrainingHistories__r"/>
</apex:page>

But then because I'm using the standard controller of the Applicant object, I will not be able to create it as a custom link on an "Application" page layout.

So at the end I have to use a custom controller instead and use the ApexPages.getParameters() to pass the ID of the applicant.

I am able to do that, but then I wonder is there really no way to implement this requirement without Apex?

I was trying to think of another method.  Is it possible for me to display the Training History related list of an applicant in the applicant's Application view?

Which is the title of my post, how do I display a parent's child's related list from the parent's another child's page layout?

Thanks
king