Variable inside a filter

[Steven Schneider]

I'm trying to, well, here's the code:

A > I define a macro fpnl (eventually, first previous next last) that accepts a tiddler (usually, <<currentTiddler>> and a field that has a value

B > I am trying to generate a link to the first & last & next & previous tiddler that shares the value on the specified field with the currentTiddler

C > right now, I can not get the list filter to work with the field and value variables. Obviously, my mistake is in the filter line (between 3 & 4 below).  I've tried:

[field:$field$<fieldvalue>]

[field:$field$[<fieldvalue>]]

[field:$field$[<<fieldvalue>>]]

Any suggestions?

\define fpnl(tiddler field)

1 tiddler: <<currentTiddler>><br>

2 field: $field$<br>

<$set name="fieldname" value=$field$>

<$set name="fieldvalue" value="<$view field=$field$/>">

3 value of $field$: <<fieldvalue>><br>

<$list filter="[field:$field$[<fieldvalue>]]">

4 <<currentTiddler>><br>

</$list>

</$set></$set>

\end

<$macrocall $name="fpnl" tiddler=<<currentTiddler>> field="season"/>

``(with current tiddler having field season=winter)

``

Thanks,

//steve.

[Mark S.]

There's at least 2 mistakes in your code. But it's easy to make mistakes in the quasi-documented world of TW macros, parameters, transclusions ...

This:

<$set name="fieldvalue" value="<$view field=$field$/>">



isn't doing what you think it's doing. It's not assigning the value of the view to fieldvalue. It's assigning a string that gets passed on as "<$view field=$field$/>" which in turn gets processed on #3 and LOOKS like it's doing what you want. But what you want is (or probably is):

<$set name="fieldvalue" value={{!!$field$}}>

In the filter operator, this:



<$list filter="[field:$field$[<fieldvalue>]]">



should be



<$list filter="[field:$field$<fieldvalue>]">



Notice that the angle brackets replace one set of square brackets.

Good luck!
Mark