hibernate - Grails Domain - Child with multiple parent cascade behavior -

i have following domain classes

class child {     static belongsto = [parent1: parent1, parent2: parent2]      static constraints = {         parent1(nullable: true)         parent2(nullable: true)     } }  class parent1 {     child singlechild }  class parent2 {     static hasmany = [children: child]     static mappedby = [children: 'parent2']     static mapping = {         children cascade: "all, all-delete-orphan"     } }    

child belongs parent1 and/or parent2.

parent1 has onetoone relation child , parent2 has onetomany relation child.

problem: if delete parent1, see child belongs both parent1 , parent2 gets deleted.

question: there way not automatically delete child if belongs parent2?

i able overcome issue doing following:

for cascade save , update

1) remove [parent1: parent] belongsto in child class

2) add cascade: "save-update" parent1 class.

this modified child , parent class. no change parent2

class child {     static belongsto = [parent2: parent2]      static constraints = {         parent2(nullable: true)     } }  class parent1 {     child singlechild     static mapping = {         singlechild cascade: "save-update"     } } 

when parent1 deleted, check if singlechild has parent2. if not, delete singlechild. here code

if(parent1.singlechild.parent2 ==  null) {     parent1.singlechild.delete() }