I'm having difficulties using the sameday operator to select tiddlers based
on a date+time field. For example, the following code results in the newly
created tiddler being listed under the next day's date (hard-coded into
this example) rather than today's date.
<$button>Make Tiddler with ~MyDateField=<<now "YYYY0MM0DD0hh0mm">>
<$action-sendmessage $message="tm-new-tiddler" title="Tiddler made now"
tags="Test" MyDateField=<<now "YYYY0MM0DD0hh0mm">>/>
</$button>
__Tiddlers with sameday in ~MyDateField as <<now "YYYY0MM0DD">>__<br>
<$list filter="[tag[Test]sameday:MyDateField<now>]" >
<$link><<currentTiddler>></$link> {{!!modified}} {{!!MyDateField}}
</$list>
__Tiddlers with sameday in ~MyDateField as 20170106__<br>
<$list filter="[tag[Test]sameday:MyDateField[20170106]]" >
<$link><<currentTiddler>></$link> {{!!modified}} {{!!MyDateField}}
</$list>
__Tiddlers with sameday in ~MyDateField as 20170107__<br>
<$list filter="[tag[Test]sameday:MyDateField[20170107]]" >
<$link><<currentTiddler>></$link> {{!!modified}} {{!!MyDateField}}
</$list>
I understand that there have been some issues around how UTC vs. local time
are used, such as those discussed in the "TW5 created/modifed info is
UTC/GMT? (odd results in Recent Tiddlers list)" thread. I'm not certain,
but I didn't notice this issue on TW version 5.0.9ish. For my immediate
purposes, it would be sufficient to just match the first eight characters
of a date+time field. I've tried to construct a regular expression filter
with the parameter coming from transclusion of another tiddler's field, but
am stumbling on the concatenation of the "^" anchor with the transclusion
of another tiddler's field. Is there some way to apply something like the
prefix operator to fields (such as my custom date+time) other than titles?
Thanks,
Kevin
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