Struggling with a set command

#1

I have this command (variable pp represents parentplace):

<$set name=trclass filter="[is[current]contains:place<pp>then[]else[highlight-row]]">

This is setting a variable named trclass (as in a table row class name. This commands works. However, I also want it to work if variable “pp” is not defined. So, my rules are:

if pp is not defined: trclass should be blank/empty string.
if pp is defined and contains in place field of the current tiddler then return blank/empty string.
if pp is defined and not contains in place field of the current tiddler then return “highlight-row”.

CoPilot came up with this:

<$set name=trclass
      filter="[<pp>match[]then[]else[
                 [is[current]contains:place<pp>]
                 [is[current]!contains:place<pp>then[highlight-row]else[]]
              ]]">

…which I have not been able to get to work.

Thanks, any help would appreciated.

Craig

#2

The Copilot code doesn’t work because it’s trying to use entire filter runs as the parameter of a filter operator, which isn’t valid filter syntax.

I’d try something like this instead:

filter="[<pp>!match[]] :map[<..currentTiddler>!contains:place<pp>then[highlight-row]]"

If you filter for the one instance in which you want a non-blank result (i.e. <<pp>> is non-blank and !!place does not contain <<pp>>) you shouldn’t have to specify a fallback else[], as all other cases will produce an empty result by default.

1 Like
#3

@etardiff Thank you. This is about the 5th time the correct solution was with the use of :map.for complex filters.

1 Like
#4

This should also work (without using :map)…

filter="[<pp>!match[]then<currentTiddler>!contains:place<pp>then[highlight-row]]"

-e