How to delete realm objects with their child relations?

问题

I have a big object that has a lot of relationships with other objects and those objects have relationships with other objects as well. So when i delete the root object, i found out that only the parent object is being deleted while all its relationships are not, is there way to delete the whole tree in the same transaction ?

回答1:

Realm doesn't support cascading delete for now. You can vote for that feature there. In the current case, seems you need to do it manually, one by one.

realm.executeTransaction(new Realm.Transaction() {
    @Override
    public void execute(Realm realm) {
        RootObj root = realm.where(RootObj.class)
                            .equalTo(RootObjFields.ID, rootId)
                            .findFirst();
        if(root != null) {
            if(root.getChild() != null) {
               root.getChild().deleteFromRealm();
            }
            root.deleteFromRealm();
        }
    }
});

来源：https://stackoverflow.com/questions/40426414/how-to-delete-realm-objects-with-their-child-relations