What is the equivalent of the has operator for Indexes

[TonyM]

Folks,

It seems easy to test for the existence of a field with the has operator, 

and even if it exists at all !has:field<fieldname> 

• I have buttons to add something to a json data tiddler and give it a value Yes
• I can reverse this with a button give it a value No

Can any one tell me how I can detect the index is not present at all?

Eg !has:index[indexname]

Thanks in advance

Regards

Tony

[Joshua Fontany]

I could be wrong, but I don't think there actually is an equivalent that would retain the context of the previous filter output.

You could `...indexes[]match<testVar>]` but that would output the field name, not the name of the tiddler the field exists in.

I don't think it would be hard to add a `has:index[]` suffix to the Has Operator.

Best,
Joshua Fontany

[TonyM]

Joshua

A surprise gap. I will try and solve it with a workaround and share back. I suspect emptyMessage or the else may be the answer

Regards
Tony