Flashing value to a <select> element in Play Framework - scala

Question

I'm aware that value of a 'select' element can't be set from the 'value' attribute but via putting a 'selected' attribute in 'option'.
I made a simple if-else block comparing the flash value to put a 'selected' attribute on the right 'option'.
But it didn't work and always went to the else block, even though the 'value' returned by the flash is correct (The 'value' of 'select' in the else block).
#if(flash.get("""value""") == "value3"){
<select>
<option value="value1">value1</option>
<option value="value2">value2</option>
<option value="value3" selected>value3</option>
</select>
}
#if(flash.get("""value""").equals("value2")){
<select>
<option value="value1">value1</option>
<option value="value2" selected>value2</option>
<option value="value3">value3</option>
</select>
} else{
<select value="#flash.get("""value""")">
<option value="value1" selected>value1</option>
<option value="value2">value2</option>
<option value="value3">value3</option>
</select>
}
Is there actually a way to set value with Play Framework flashing?
EDIT
So, I tried using the custom helper blesior written.
#myOwnOptionHelper(optionValue: String, optionLabel: String) = {
<option value = "#optionValue"
#if(flash.get("""flashValue""") != null && flash.get("""flashValue""") == optionValue) { selected = "selected" } >#optionLabel</option>
}
And the select element
<select>
#myOwnOptionHelper("value1", "value1")
#myOwnOptionHelper("value2", "value2")
#myOwnOptionHelper("value3", "value3")
</select>
The result is, after flashing none of the option gets selected.
I tried rewritting the if block and displayed the flashvalue for the sake of testing.
#myOwnOptionHelper(optionValue: String, optionLabel: String) = {
<option value = "#optionValue"
#if(flash.get("""flashValue""").isDefined && "value2" == optionValue) { selected = "selected" } >#flash.get("""flashValue""") + #optionLabel</option>
}
And it worked. After flashing "value2" is selected and displayed the correct flashValue (ex: "value1 + value2"). I changed the "!= null" to ".isDefined" for testing because the value2 gets selected even though there is no flashing happening.
EDIT 2
Apparently flash.get("flashValue") is an [Option]. And that explains why it didn't trigger the right if-else block on the first place, because it returns a Some(value). By adding a match-case block, the custom helper works perfectly. Thanks to #blesior
#myOwnOptionHelper(optionValue: String, optionLabel: String) = {
<option value = "#optionValue"
#if(flash.get("flashValue").isDefined && (flash.get("flashValue") match {
case Some(x:String) => x
case _ => ""
}) == optionValue) { selected = "selected" } >#optionLabel</option>
}

Answer 1

Hm, two mistakes:
you are performing two blocks here - first is checking value3, second is checking value2 or else. That means, that if your value will be 3 you'll get TWO select fields
Why do you repeat all options in all blocks?
Instead you can write custom helper for the option tag, which will generate it and check flashed value against the value of option, you can do this even in the same view, although it would be better if it was done in tag template (docs)...
#myOwnOptionHelper(optionValue: String, optionLabel: String)={
<option value="#optionValue"
#if(flash.get("myFlashedValue") != null && flash.get("myFlashedValue")==optionValue) { selected="selected"} >#optionLabel</option>
}
<select name="someSelect">
#myOwnOptionHelper("value1", "One")
#myOwnOptionHelper("value2", "Two")
#myOwnOptionHelper("value3", "Three")
#myOwnOptionHelper("value4", "Four")
<!-- ... -->
#myOwnOptionHelper("value1000000", "Million")
</select>
Of course the helper can get other params i.e. if you don't want to pass the set value by flash, but reading it from some other model, etc.