automatically update field

[mohamed maghrabi]

Hi,

is it possible to have one field change value based on another value entered in another field

so i am thinking similar to excell you can say if cell x = 1  then current cell =y

sorry if i sound naive:)

[Mohammad Rahmani]

• YES

Example i

tiddler A has field fdx and fdy and you like fdy gets the value from fdx dynamically 

then put this in field fdy:  {{!!fdx}}

  Example i  

tiddler A has field fdx and tiddler B has fdy and you like fdy gets the value from fdx dynamically 

then put this in field fdy of tiddler B:  {{A!!fdx}}

Best wishes

Mohammad

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[Soren Bjornstad]

Just to be clear, this doesn't actually set the value of the field B to the value of field A…it sets the value of field B to a reference to the value of field A. This is exactly how it works in a spreadsheet too, so that's probably what you're looking for. There are also ways to create an action that will permanently set the value of field B instead if that's more useful.

And one proviso, because this does a transclusion, you won't be able to use the field B as the value of an attribute and have it work as expected. Like suppose field A contained a list of tiddlers and you wanted to display them; you might try:

<$list filter={{!!fieldB}}>...</$list>

If you do that the filter will just get set to the literal text "{{A!!fdx}}" and you won't see anything. (There are ways to get around this, but I've probably said more than you need already.)

[PMario]

Hi,

If you need spreadsheet-like calculations you may have a closer look at: https://chronicles.wiki/TiddlyWikiFormula  Especially the "Spreadsheet Prototype" tiddler

-mario

[paulgilbert2000]

Hi Soren,

.

ok .all i am really after , is to have a field automatically populate a value "urgent"  once a  previously entered date value  in field B  is 3 days away.

so i am trying to flag task tiddlers that are due, hope this makes sense

[Joshua Fontany]

You could setup your UI as 2 lists, one list to filter the Urgent ones first (with different CSS styling), then another list for non-Urgent tiddlers. You cannot change data in fields automatically, data updates require user interaction (a button with actions, a drag-and-drop, etc).

Best,
Joshua Fontany

[Soren Bjornstad]

Is there any particular reason you need it to change a field, specifically? As Joshua pointed out, the normal way to do this in TiddlyWiki is to use a filter at the time you want to display whether the task is urgent. Can you explain how you use these task tiddlers? For example, are they in a list, and the items should have an "urgent" marker next to them if urgent?

[paulgilbert2000]

Hi,

Ok what i really wanted is to have a field populate a value automatically via action set field , which now i understand cant be done, however i did find a solution, as the timers /alarms widget was just updated to have action widgets triggered once an alarm reached its due date, which is exactly what i needed

checkout https://groups.google.com/g/tiddlywiki/c/YRx2ZdPHOU0