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I retrieve a field 3 levels deep which is working currently. The field which I currenly retrieve is going to become a dynamic field retrieved from custom metadata. How do I cast this to an id? I currently have the following but this isnt working:

Id conId = (Id) duInv.Invoice__r.BillingAccount__r.(Mdt.AccountContactId__c);
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You would use the sObject.get method:

Id conId = (Id) duInv.Invoice__r.BillingAccount__r.get(Mdt.AccountContactId__c);

Assuming that Mdt is the custom metadata record, and AccountContactId__c is the lookup field.

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  • Thanks didn't think of that. – Thomas Mar 12 at 9:57

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