Should the set operator update index values and convert Dates to ISO strings?

[kjohnstonadept]

I noticed that when using set, if I set a value that is referenced in a GSI using the set operator, it doesn't update the GSI field. Is that working as designed? If I just update the object values directly, the GSI keys are updated.

Say I have a gsi field like so:

          sk1: { type: String, value: 'renew#${renewDate}' },
          renewDate: { type: Date }

This updates sk1 and also converts renewDate to an ISO string:

      subscriptionRenewalModel.update({
            id: subId,
            renewDate: renewDate
       });

But this does not:

      subscriptionRenewalModel.update({
              id: subId 
            },
            { set: {  renewDate: renewDate } }
       );

I also noticed that the renewDate does not get converted to an ISO string when using the set operator, but does when I just call update.

[mobsense]

That is working as implemented. We should note that in the docs. The issue is a set expression is evaluated by DynamoDB if you give a compound expression, so we cannot convert types or expand the value templates that may use that value (sk1).

[kjohnstonadept]

OK thanks!