A how to: protecting my code from my continous tiddler title changes

[Charlie Veniot]

G'day,

This is just one of my practices to fully take advantage of relink to protect my code from me and my continuous tweaking of tiddler titles.

Some sample code:

<$vars DataTid={{{ [<currentTiddler>addsuffix[ Data]] }}}

           EditorName={{Sheet Designer!!title}}>

<$vars selectedSheet={{{ [<DataTid>getindex[selected_sheet]] [<currentTiddler>!match<EditorName>] +[last[]] }}}

           bViewOnly={{{[<currentTiddler>!match<EditorName>then[yes]else[no]]}}}>

About that sample code:

In the "TiddlySheets" project I've got going on, my "Sheet Designer"  (or "Sheet Editor"; I am on the fence) is the tiddler in charge of creating and editing sheets (like "TreeSheets", not like spreadsheets).  The tiddler also serves a second function: as a transclusion template, so that if I want to "publish" a sheet in some tiddler,  I transclude the sheet (a data tiddler) using the "Sheet Designer" as transclusion template.

The code above says:  hey, if this code (or "TiddlyWiki scripting") is happening for current tiddler = "Sheet Designer", then behave for that context (i.e. allow editng of the sheet); if this code is happening for current tiddler = something other than "Sheet Designer" then behave for that context (i.e. show the view-only sheet.)

Back to discussion:

Originally, my code was as follows:

<$vars DataTid={{{ [<currentTiddler>addsuffix[ Data]] }}}>

<$vars selectedSheet={{{ [<DataTid>getindex[selected_sheet]] [<currentTiddler>!match[SheetEditor]] +[last[]] }}}

           bViewOnly={{{[<currentTiddler>!match[SheetEditor]then[yes]else[no]]}}}>

Then I changed the tiddler's name from "SheetEditor" to "SheetDesigner".

And then my tiddler stopped working correctly.  And it took me a while to realize:  the Relink plugin could not catch the "hard-coded" reference to "Sheet Editor" inside my code's filter.

Once bitten, twice shy.  I changed my code as per way above.

Pretty much wherever I refer to a tiddler, instead of referring to that tiddler by title, I refer to the tiddler by transclusion of the title, which the Relnk plugin never misses.

So "{{ThisTiddler!!title}}" instead of "ThisTiddler".

I am a tweaker by nature, and that will never change.

So I code as per my nature.  Or I quickly refactor my code when I momentarily forget about my nature.

Anyways, all of that in case any other tweakers out there want to max out the benefits of relink.

[PMario]

Hi,

You may be interested in https://flibbles.github.io/tw5-relink/#Inline%20Declarations:%5B%5BInline%20Declarations%5D%5D%20Documentation

-m

[Charlie Veniot]

G'day g'day,

Thanks for the reference!  That documentation is quite awesome.

Although not my cup of tea, I think the majority of folk will find pragmas and whitelisting are cherries on top of the sweet goodness that is relink.

[Flibbles]

Yeah, the *match* operator isn't in the operator whitelist by default since match isn't exclusively used for tiddler titles. You can add it, but then if you're using *match* elsewhere, it may result in unexpected relinks. What you're doing probably is the best practice.

However, if you decide to make this code reusable by plugging it all into a macro, then EditorName could be a macro param, and using the *\relink* in that case would be most clear.

Glad to hear Relink is helping out.

-Flibbles

[Charlie Veniot]

Helping out?

Oh heck, for the way my sponge works:  Relink truly is a godsend.

Uh, well, you would be the godsend?

The Relink angel?

The Relink fairy?

Well, let's say I gusheth with heaps of praise.

[Flibbles]

Glad to hear it!

Also, one small thing: you could have your filter be [<currentTiddler>!match{Sheet Designer!!title}then[yes]else[no]] if you wanted to get around making a variable.

[Charlie Veniot]

I was not awares I could slap a transclusion in a filter.

That is quite awesome.  Thanks !