Checking Record Type Id of object

Question

I have a requirement to check the record type of a custom object being iterated over in a for loop (ContentDocumentLink) as part of an after insert trigger.

I have tried the following, assign Id variable to hold record type Id

Id RTId = Schema.SObjectType.Custom_Object__c.getRecordTypeInfosByName().get('Record Type Name').getRecordTypeId();

However, I am confused as to how to access the record type Id of the object instance in the for loop for when I do a conditional check in an if statement:

  if( //Some Condition && **cd.LinkedEntityId.getRecordTypeId() !== RTId**)
        {
            PAIds.add(cd.LinkedEntityId);
            documentIds.add(cd.Id);

        }

I keep getting various compile errors depending on what I try, most recently "Method does not exist or incorrect signature: void getRecordTypeId() from the type Id" I'm sure it's some simple ignorance on my part of how to access from for loop object 'cd'.

Answer 1

Since the system won't allow you traverse the LinkedEntityId relationship, you have to take several steps to do what you want.

You must loop through the ContentDocumentLink records to collect the LinkedEntityId values, do a query on the custom object filtering on the record type ID, and put those object IDs into a second collection. Then in your ContentDocumentLink loop, you can compare the LinkedEntity ID to your second collection because those are of the the desired record type.