multiselect bug when clearing selection with initial values

[alexmnyc]

Guys,

I keep running into the same issue with the multiselect control. The test is the following:

If multiselect is initialized with selected values, clearing multiselect clientside (nothing i selected) and submitting the form yields initial values that were set rather than an empty List(). Does anyone know how to overcome clearing of the selected values in multiselect?

Thank you,

Alex

[alexmnyc]

a simple example is 

    lazy val features = Feature.findAll(OrderBy(Features.name, Ascending))

    

val mS = multiselect("Features",

    userVar.is.features.all,

    features){

    feature:Feature => feature.label

  }

in finish() ....  mS equals initially set userVar.is.features.all if all options are cleared in the form

[alexmnyc]

Forgot to mention this with lift 3.0-M1, Scala 2.10.4

[Richard Dallaway]

Yup, that's been noted: https://github.com/lift/framework/issues/1139

There's a work-aound in the Discussion section of this:

http://chimera.labs.oreilly.com/books/1234000000030/ch03.html#_solution_31

Richard

On Thu, 26 Mar 2015 at 02:52 alexmnyc <a.mik...@gmail.com> wrote:

Forgot to mention this with lift 3.0-M1, Scala 2.10.4

--
--
Lift, the simply functional web framework: http://liftweb.net
Code: http://github.com/lift
Discussion: http://groups.google.com/group/liftweb
Stuck? Help us help you: https://www.assembla.com/wiki/show/liftweb/Posting_example_code

---
You received this message because you are subscribed to the Google Groups "Lift" group.
To unsubscribe from this group and stop receiving emails from it, send an email to liftweb+u...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[alexmnyc]

Richard, thank you.

Since this was in liftscreen, I had to do the following which is working as expected.

override def multiselect[T](name: => String, default: => Seq[T], choices: => Seq[T], stuff: FilterOrValidate[Seq[T]]*)
                            (implicit f: SHtml.PairStringPromoter[T]): Field {type ValueType = Seq[T]; type OtherValueType = Seq[T]}
= {
  val eAttr = grabParams(stuff)

  makeField[Seq[T], Seq[T]](name, default,
    field =>
      Full(SHtml.hidden( () => field.set(Nil))++
      SHtml.multiSelectElem(field.otherValue,
        field.is, eAttr: _*)(field.set(_))),
    OtherValueInitializerImpl[Seq[T]](() => choices),
    stuff: _*)
}