find tiddlers with field name using regex?

[Dave Parker]

Hi,

I'm trying to list tiddler with a date as a field name.  In the following 3 lists, the first and the third work, but not the 2nd (which is the one I need to work)

<<list-links "[has[2020-04-29]]">>

----

<$set name="digit-pattern" value="[20][1-9][0-9]-[0-2][0-9]-[0-3][0-9]">

<<list-links "[regexp:has<digit-pattern>]">>

</$set>

----

<$set name="digit-pattern" value="[20][1-9][0-9]-[0-2][0-9]-[0-3][0-9]">

<<list-links "[regexp:title<digit-pattern>]">>

</$set>

The first finds tiddlers with "2020-04-29" as the field name, the third finds tiddlers with the title of the regex pattern, but I need to find tiddlers with field names by that pattern.

Why does the 2nd not work (and how do I fix it?)

Thanks,

- Dave

p.s., I also tried this which didn't work:

<$set name="digit-pattern" value="[20][1-9][0-9]-[0-2][0-9]-[0-3][0-9]">

<<list-links "[regexp:field<digit-pattern>]">>

</$set>

[Mark S.]

Unless you've created a field "has", regexp:has won't mean anything.

I'm not convinced that #1 and #3 are doing what you think they're doing. [20] is a character class, not a match. I think they should be plain old "20" without the square braces. But I could be wrong.

[Dave Parker]

oh yeah, that makes sense

tried this:

<$set name="digit-pattern" value="20[1-9][0-9]-[0-2][0-9]-[0-3][0-9]">

<<list-links "[regexp:has<digit-pattern>]">>

</$set>

but although it works in the 3rd one, the above still doesn't work.

Regarding the "has" argument, doesn't that mean in a filter you're looking for tiddlers that "have" a certain named field?  For example in the filter box on advanced search if I put in [has[2020-04-29]] it does return the correct tiddlers

[Mark S.]

"Has" by itself is a filter operator. "Has" after a colon (:) is a suffix indicating a field. So regexp:has means to look in field "has" using a regular expression for comparison . It would probably be a bad thing to call a field "has", BTW IMO.

I'm not sure what you are trying to do in #2 that is different from #3. You're just checking to see if the title matches the pattern, right?

[Dave Parker]

I'm trying to find field names that are named in a date format, .e.g.

Find tiddler "Howard" that has a field named "2020-04-28” or any date after this January 1, in fact every tiddler with a field so named.

[tony]

Hi 

I'm learning too and found Eric Shulman's http://tiddlytools.com/filtergenerators.html is helping to learn all about this filtering business

This filter expression in filter search

[all[tiddlers]search:*:regexp[\d\d\d\d-\d\d-\d\d]sort[title]]

found a test tiddler 

Title: Howard
Field name: 2020-04-29
Field value: foo

Not sure why the field name would be named as a key, but you can try playing with different values in the PowerSearch  and copypasta the resulting query into the AdvancedSearch filter tab field

Best,

tony

[Dave Parker]

Oh cool! I'll give that a try. I'm wondering if it would also find dates in titles and tags also though. I'll look there in the morning and see if I can restrict it to fields only.

Thanks!
- Dave

[Dave Parker]

You all convinced me it was dumb to use a field *name* alone as a variable, so I used the info above to switch to keeping the dates in a field called dates like this:

\define subj2(tag day)

''Current complaints''

<$set name="digit-pattern" value="$day$">

<$list filter="[regexp:dates<digit-pattern>]">

<div>

{{||clist.temp.mynow}}

</div>

</$list>

</$set>

Previous Complaints

<$set name="today1" value="$day$">

<$set name="digit-pattern" value="[\d\d\d\d-\d\d-\d\d]" >

<$list filter="[regexp:dates<digit-pattern>!regexp:dates<today1>]"><div>

{{||clist.temp.mynow}}

</div>

</$list>

</$set>

</$set>

\end

\define subj()

<$macrocall $name=subj2 tag=Subjective day={{my-now}} />

\end

<table>

<tr>

<td><<subj>></td>

<td> {{newSubjective}} </td>

</tr>

</table>