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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T10:42:29+00:00 2026-05-13T10:42:29+00:00

In my Grails domain I have something like the following class A { String

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In my Grails domain I have something like the following

class A {
    String name
    static hasMany = [ b : B ]
    SortedSet b
    static fetchMode = [ b:"eager" ]
}

class B implements Comparable{
    A a
    ... compareTo method defined ....
}

What I’m trying to do is to retrieve an instance of class A, and at the same time have its collection (b) populated.

So I do A.get(1), expecting b to be populated,

but b.each(){
println it
}

tells me that I’m calling each on a null object

I fear that I am fundamentally missing the point here, but I can’t see what I’m doing wrong.

I’m running this as as integration test, against a MySql database. The database appears to be populated with data that would allow the association between A and B.

Any help greatly appreciated.

Dave

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  1. Editorial Team
    Editorial Team
    2026-05-13T10:42:29+00:00Added an answer on May 13, 2026 at 10:42 am

    Maybe you need

    static mapping = {
    b lazy:false }
    
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