Maintaining both sides of self-referential many-to-many relationship in Grails domain object
- by Ali G
I'm having some problems getting a many-to-many relationship working in grails. Is there anything obviously wrong with the following:
class Person {
static hasMany = [friends: Person]
static mappedBy = [friends: 'friends']
String name
List friends = []
String toString() {
return this.name
}
}
class BootStrap {
def init = { servletContext ->
Person bob = new Person(name: 'bob').save()
Person jaq = new Person(name: 'jaq').save()
jaq.friends << bob
println "Bob's friends: ${bob.friends}"
println "Jaq's friends: ${jaq.friends}"
}
}
I'd expect Bob to be friends with Jaq and vice-versa, but I get the following output at startup:
Running Grails application..
Bob's friends: []
Jaq's friends: [Bob]
(I'm using Grails 1.2.0)
