[SalesForce] Show case emails related list on custom object page layout

I am trying to create a Visualforce page to be displayed inline on a custom object page layout (Project__c) so that I can display a list of case emails on the case for the case related to the project.

The metadata tells me that the relationship name is "EmailMessages", so I created the following Visualforce page:

<apex:page standardcontroller="Project__c" showHeader="false" sidebar="false">
    <apex:relatedList list="EmailMessages" subject="{!Project__c.Case__c}"/>
</apex:page>

However when I view the page I get:

   Content cannot be displayed: 'EmailMessages' is not a valid child relationship name for entity Case

Wondering if anyone else has run across this and knows of the correct relationship name or a workaround other than having to manually replicate this related list?

Best Answer

Oftentimes, this is caused by the user not being able to access this object or if this related list is not currently displayed on the page layouts. This type of syntax might help:

Also, if users have overridden the standard page layouts to remove a related list, this can cause an issue. Make sure to override all users' customizations for this related list.

Related Solutions

[SalesForce] CaseComment and CaseHistory relatedlist in visualforce page

I tried with this and works for me.

  <apex:pageBlock>
        <apex:pageBlockTable value="{!case.casecomments}"var="c">
            <apex:column value="{!c.commentbody}"/>
        </apex:pageBlockTable>
        <apex:pageBlockTable value="{!case.Histories}" var="c">
            <apex:column value="{!c.OldValue}"/>
            <apex:column value="{!c.NewValue}"/>
        </apex:pageBlockTable>
    </apex:pageBlock>

[SalesForce] Visualforce: Displaying A Custom Object’s Related List When the Custom Object Isn’t Directly “Related”

As you said your object has contact as Master-Detail relationship in that case it is bit tricky to display them on Account layout. Reason being Account is itself master on Contact object it means multiple contact can be child of Account so if you want to show childs of Contact object, you don't know which contact's child it is.

As an alternative option you can create Account lookup on your custom object and fill that field with Account id in that way you will get relationship name which you can use directly on your Account related list.

so for example if you have a custom object named Obj_Child__c which has Contact as Master after creating Account as lookup with named Account__c your relationship name will be

<apex:relatedList list="Contact_child__r"/>

Best Answer

Related Solutions

[SalesForce] CaseComment and CaseHistory relatedlist in visualforce page

[SalesForce] Visualforce: Displaying A Custom Object’s Related List When the Custom Object Isn’t Directly “Related”

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