Re: XLAT Question

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On Apr 13, 2026, at 4:59=E2=80=AFPM, [email protected] wrote:
> I read about the default / alternation syntax for string expansion, =
like %{%{Foo}:-bar}.
>=20
> But what I needed is this:=20
>   if (foo !=3D '' ) ? '[ %{foo} ]' : 'null'.
>=20
> This is for a JSON request string in a REST module configuration. The =
request property in question must be a JSON array (  [ .. ] ) or 'null'.
>=20
> I could use Unlang IF and declare the complete JSON request in =
different versions depending on foo. But I would prefer to do this with =
expansion inside the JSON string definition, if possible.

  You'll have to use 'if'.  There is a mods-available/json, and you can =
do:

	%{json_encode:&foo}

  Except that if "foo" doesn't exist, it returns an empty json object: =
"{}"

  Alan DeKok


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