Enum in Grails Domain - grails

Question

I'm trying to use an enum in a Grails 2.1 domain class. I'm generating the controller and views via the grails generate-all <domain class> command, and when I access the view I get the error shown below. What am I missing here?
Error
Failed to convert property value of type java.lang.String to required type
com.domain.ActionEnum for property action; nested exception is
java.lang.IllegalStateException: Cannot convert value of type
[java.lang.String] to required type [com.domain.ActionEnum] for property action:
no matching editors or conversion strategy found
Enum (in /src/groovy)
package com.domain
enum ActionEnum {
PRE_REGISTER(0), PURCHASE(2)
private final int val
public ActionEnum(int val) {
this.val = val
}
int value() { return value }
}
Domain
package com.domain
class Stat {
ActionEnum action
static mapping = {
version false
}
}
View
<g:select name="action"
from="${com.domain.ActionEnum?.values()}"
keys="${com.domain.ActionEnum.values()*.name()}" required=""
value="${xyzInstance?.action?.name()}"/>
EDIT
Now getting error Property action must be a valid number after changing the following.
View
<g:select optionKey='id' name="action"
from="${com.domain.ActionEnum?.values()}"
required=""
value="${xyzInstance?.action}"/> // I tried simply putting a number here
Enum
package com.domain
enum ActionEnum {
PRE_REGISTER(0), PURCHASE(2)
final int id
public ActionEnum(int id) {
this.id = id
}
int value() { return value }
static ActionEnum byId(int id) {
values().find { it.id == id }
}
}
Domain
package com.domain.site
class Stat {
static belongsTo = Game;
Game game
Integer action
static mapping = {
version false
}
static constraints = {
action inList: ActionEnum.values()*.id
}
String toString() {
return "${action}"
}
}

Answer 1

Take a look here ...
Grails Enum Mapping
Grails GORM & Enums
Also you may be hitting this as well. From the docs:
1) Enum types are now mapped using their String value rather than the ordinal value. You can revert to the old behavior by changing your mapping as follows:
static mapping = {
someEnum enumType:"ordinal"
}