No row with the given identifier exists

class A {

B b

}

class B {

String name

}

If you have an A has B relationship. If from the database end, A says has B and with B's id, but actually that B's id doesn't exist in B's table. Then it will complains: No row with the given identifier exists

A workaround of this is to use ignoreNoFound like below

class A {

B b

static mapping = {

b ignoreNotfound : true

}

}