Defining default sort-order in Grails/GORM

Question

Let\'s say I have definied a User object using GORM. Each user can have zero or more Login:s. Each Login has a timestamp. When retrieving user.logins I want the logins to be sor

Answer 1

Just make the Login Class implement the Comparable interface:

class Login implements Comparable {

    // ...

    Date date

    public int compareTo(def other) {
        return date <=> other?.date // <=> is the compareTo operator in groovy
    }

}

and declare the relation to be a SortedSet:

class User {
  ...
  def hasMany = [logins: Login]               
  SortedSet logins

  static fetchMode = [logins: "eager"]
}