Is there a trick to show a value in the select widget that is not in the opitons?

#1

If the value of the select widegt is not within the options choice seems to be empty, even if a value is set.
Is there a workaround for this?

#2

Well, after thinking five minutes:
The workaround is adding the fieldvalue to the options by means of a filter…

#3

Try this:

CHOSEN: <$edit-text field="chosen"/><br>
<$set name="items" filter="[tag[HelloThere]]">
<$let chosen={{!!chosen}}>
<$select field="chosen">
   <$list filter="[enlist<items>]"><option><<currentTiddler>></option></$list>
   <$list filter="[enlist<items>match<chosen>count[]match[0]then<chosen>!match[]]">
      <option><<chosen>></option>
   </$list>
</$select>

Notes:

  • Line 1 lets you enter an arbitrary value into the “chosen” field
  • Line 2 gets a list of possible values (in this example, a list of all tiddlers tagged with “HelloThere”)
  • Line 3 gets the current chosen field value as a variable
  • Line 4 starts the $select widget to set the “chosen” field
  • Line 5 creates option choices for all list items
  • Line 6 is a conditional that says “if the current value is not in the list of items, and is also not a blank value”
  • Line 7 adds the option for the chosen value
  • Line 8 ends the conditional
  • Line 9 ends the $select list

enjoy,
-e

3 Likes
#4

And just to fill out @EricShulman’s comprehencive answer I often find a reason to provide a reset option

<option value="">(clear)</option>
  • Inside the select widget but outside one of the list widgets use in erics solution.
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