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grailsgsphtml-select

Single select <g:select> is producing more than one "selected" item by default

I have a <g:select> in one of my GSPs that looks like this:

<g:select id="location" name="criteria.location" from="${example.Location.list()}" optionKey="id" required="" value="1" class="many-to-one"/>

The expected result would be something like this, right?

Expected result:

<select id="location" name="criteria.location" required="" class="many-to-one" >
    <option value="1" selected="selected" >1st Location Name</option>
    <option value="2" >2nd Location Name</option>
    <option value="3" >3rd Location Name</option>
    <!-- entries omitted -->
    <option value="49" >49th Location Name</option>
    <option value="50" >50th Location Name</option>
</select>

But what do I get? I end up with two selected items. The 49th option gets selected as well, and I cannot begin to imagine why! There is absolutely no mention of the value "49" in my code...

Actual result:

<select id="location" name="criteria.location" required="" class="many-to-one" >
    <option value="1" selected="selected" >1st Location Name</option>
    <option value="2" >2nd Location Name</option>
    <option value="3" >3rd Location Name</option>
    <!-- entries omitted -->
    <option value="49" selected="selected" >49th Location Name</option>
    <option value="50" >50th Location Name</option>
</select>

If I change the value in my <g:select> to "3" for example, the 3rd option gets selected, but for whatever reason the 49th item still gets selected as well.

Edit: Even more bizarre, if I change the value property to a value greater than 49, the select works and only the nth option is selected!

Update: I posted an answer detailing how I got it working, but I still do not understand the original behaviour of the <g:select> tag.

Does anyone have any idea as to what is going on here?

Grails version: 2.2.0

Solution

  • Use value attribute for it 

    value="${location ?: 49}"

    e.g. 

    <g:select id="location" name="criteria.location" from="${example.Location.list()}" optionKey="id" required="" value="${location ?: 49}" class="many-to-one"/>