To assist future visitors

The opposite, has field with any valueis simply [is[current]has[fieldname]]
But an older example given to me was something like this

<<list-links "[is[current]has[created]sort[created]] 
[is[current]!has[created]]">> 


But I am not so clear on this.


Regards

Tony


On Thursday, July 26, 2018 at 11:54:01 AM UTC+10, TonyM wrote:
>
> I have answered my own question;
>
> The filter will be
>
> [has:field[fieldname]]+[!has[fieldname]]
>
> It works on the basis that [has:field[fieldname]] returns all tiddlers 
> with fieldname blank or otherwise
> and that [!has[fieldname]] only returns tiddlers without fieldname having 
> a value or even having the fieldname.
> To satisfy both conditions the fieldname must exist but be empty.
>
> Rergards
> Tony
>
> On Thursday, July 26, 2018 at 11:30:30 AM UTC+10, TonyM wrote:
>>
>> Folks,
>>
>> As documented here https://tiddlywiki.com/#field%20Operator the "has" 
>> operator does not seem to have a way to filter that returns tiddlers with a 
>> field, that is empty.
>>
>> We can force it to return fields that are empty along with those that are 
>> not empty, 
>> but to get a list of tiddlers that have a field but are also empty seems 
>> impossible without a nested list and testing the contents of a field using 
>> the get operator.
>>
>> *Does anyone have a tricky way of using a single filter to list such 
>> tiddlers?*
>>
>> I think this may be an issue to raise in the GitHub issues.
>>
>> Regards
>> Tony
>>
>

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