Dynamic reference to a property in an email template

Question

In an email template it is possible to reference attributes by doing...

"{!relatedTo.opportunity__r.CloseDate}"

However, if the attribute must be in your model. If you did,

"{!relatedTo.opportunity__r.CloseDate_blah_blah__c}"

The save would not be allowed. You might think fair enough it is not in the model it is catching an error. But what if you are writing an email template which uses attributes that are going to come from another package? Is there anything like dynamic soql which allows the check to made at runtime?

Thanks.

Answer 1

If the field is in a managed package you'll need it installed in the org your developing it. It'll validate the field exists at compile time just like you'd expect with unmanaged fields. Only difference is the managed package field will have a namespace. For example

{!relatedTo.opportunity__r.namespace__managed_package_field__c}

If you're trying to build an email that has configurable fields you'll want to look at using field sets.