ContentDistributionTrigger after insert ContentDownloadUrl null

Question

I have a ContentDistributionTrigger trigger after insert & update which when fired has a null value for ContentDownloadUrl.

The ContentDistribution is created in a ContentDocumentLinkTrigger as such:

ContentDistribution cd = new ContentDistribution();
cd.Name = (String)link.LinkedEntityId + ' logo' ;
cd.ContentVersionId = // my id
cd.RelatedRecordId = link.LinkedEntityId;
cd.PreferencesAllowOriginalDownload = true;
cd.PreferencesPasswordRequired = false;
insert cd;

Then in my ContentDistributionTrigger:

trigger ContentDistributionTrigger on ContentDistribution ( after insert, after update ) {

    for (ContentDistribution cd : Trigger.new) {
        System.debug(cd.ContentDownloadUrl);
    }
}

debugs as "null"

Is the ContentDownloadUrl generated after the after insert trigger fires? If so, why don't I catch it in the "after update" run of this trigger?

Thank you,

Answer 1

You need to requery the object based on the trigger context with the fields you want in order to get their values.

List<ContentDistribution> contextList = [ select id, DistributionPublicUrl, ContentDownloadUrl, ContentDocumentId from ContentDistribution where id in :Trigger.new ];

And now you can work with contextList instead of Trigger.new.