Display content only if one of two tags match for current tiddler

[Bastian]

Hi,

I enhanced the tiddler template where I added some content, that should only be displayed when the current tiddler has one of two tags.

The tags are either "project" or "task".

I have set up this list filter:

<$list filter="[is[current]tag[project] || is[current]tag[task]]"> 

 content for tiddlers with either project or task tag

</$list> 

but it just won't work.

I also tried different positions of the brackets but either the content is displayed for every tiddler or for none.

How can I make a filter for the current tiddler that only triggers if the current tiddler has one of two tags?

Best

Bastian 

[Mark S.]

The symbols || are not used for "or" in filter runs. There's a new symbol for "else". Try:

[is[current]tag[project]]~[is[current]tag[task]]

This will still run if a project happens to have both "project" and "task", if that's OK.

Good luck!

[Eric Shulman]

On Friday, February 28, 2020 at 11:49:18 AM UTC-8, Bastian wrote:

I enhanced the tiddler template where I added some content, that should only be displayed when the current tiddler has one of two tags.

The tags are either "project" or "task".  I have set up this list filter:

<$list filter="[is[current]tag[project] || is[current]tag[task]]"> 

 content for tiddlers with either project or task tag

</$list> 

but it just won't work. I also tried different positions of the brackets but either the content is displayed for every tiddler or for none.

Filter syntax doesn't use "||" to represent OR.

Instead, use two space-separated filter "runs", like this:

<$list filter="[is[current]tag[project]] [is[current]tag[task]]"> 

Note that each filter run is a complete filter syntax (including a set of matching outermost square brackets).

enjoy,

-e

[Bastian]

Dang! That works. Thanks a lot!

[TonyM]

All,

Untested idea;

The filter 

filter="[is[current]tag[project]] [is[current]tag[task]] +[count[]]" var=matches> 

Could wrap another

filter="[<matches>match[1]]" to only display when only one is true

Or perhaps (again untested)

"[is[current]tag[project]] [is[current]tag[task]] +[count[]] -[[2]]"

OR

"[is[current]tag[project]] [is[current]tag[task]] +[count[]]!match[2]]"

these are common patterns required I would like to find and publish some "best practice"

Regards

Tony