grails - forcing select list values to be saved as date to oracle db

I'm working on an app to track sessions for a conference and want to allow the user to select dates from a drop down but have the dates stored as a date in the oracle database. I've tried using the date 开发者_如何学Cpicker but want to limit the options. Here is the code I am currently using.

<g:select name="sessionDate" from="${session_MasterInstance.constraints.sessionDate.inList}" value="${formatDate(format:'mm/dd/yyyy', date:session_MasterInstance?.sessionDate)}" noSelection="['null': '']" />

The values I want to display do display correctly but when I try to create a new record I receive Propery sessionDate must be a valid Date

I have sessionDate(nullable:true, inList:["11/21/2011","11/22/2011"]) in my domain class and sessionDate of Date format in my Oracle DB.

Please advise. I'm new to grails so this is probably very simple.

It might be this issue: GRAILS-6604 (there's a workaround there for pre-1.3.6).

What Grails version are you using?

I'm in doubt about inList that contains Strings for values. If this constraint produces errors, I'd try inList: [new Date(2011, 11, 21), new Date(2011, 11, 22)].