Question

I’ve got a grails domain class I have to persist in Redis, something like this:

class A {
    String one
    Integer two

    B three

    E four

    mapWith = "redis"
}

class B {
    String name
}

enum E {
   VALUE1, VALUE2
}

When I persist an instance of class A with the GORM .save() method, Redis saves it correctly except for the enum field “four”.

As you can see the fact is known and reported here: http://jira.grails.org/browse/GPREDIS-3

Is there a good workaround to save Enum or something similar?
We’re thinking about an array of String objects, what do you think?

Answer 1

I’ve got this mostly implemented but it doesn’t work for Gemfire and I’m waiting until it’s fixed for all the supported nosql providers before pushing the fix. As a workaround you can use the inList constraint with a combination of a persistent String property and a non-persistent get/set pair with the name of your current property, e.g.

class A {
   String one
   Integer two

   B three

   String fourString

   void setFour(E e) {
      fourString = e?.name()
   }
   E getFour() {
      fourString ? E.valueOf(fourString) : null
   }

   static constraints = {
      fourString inList: E.values()*.name()
   }

   static transients = ['fourString']

   static mapWith = "redis"
}