Delete One-to-One DataObject android

General
1

I want to delete child Object which has one to one relation with parent object

Ex::
I am updating Parent Object which has relation(one-to-one) with child1 and child 2 object,
So before Update I get parent Object and load its related data child1 and 2.
but now while making update request I want to delete child 1 object (which has relation with ParentObject) ,
So I just set Parent.setChild1 = null; and make update request with updated Parent object. but what I see is that object is still there. Please help me.

2

You can not delete objects by updating relation, in this way you can only break relation.

To delete object you have to call

Backendless.Persistence.of( SomeObject.class ).remove(  someObjectInstance );
3

This is not efficient I have to make Two Call first to break link and then to remove object

4

Bye the way using my method It doest even break the relation I still get Object on Retrival

5

just remove object, link will be breaked

6

I dont have list I have single object relation so I cant just remove Object In java I guess

I am passing null but its not working