mORMot Open Source

dka1

Member

From: Greece

Registered: 2017-07-25

Posts: 28

docvariant Return value For Unknown Property

Hello,
I need a way to check missing properties so I will use "Exists",
but can I implement an option to return "undefined"
(as javascript return for unknown property) ?

TDocVariantOption has dvoReturnNullForUnknownProperty option
that return null for unknown property else raise an EDocVariant.

igors233

Member

Registered: 2012-09-10

Posts: 241

Re: docvariant Return value For Unknown Property

You can request value and check if it's null, undefined.
If you're using TDocVariantData then, GetValueOrNull or GetValueOrEmpty.