I'm using realm java in android, i have a parent class and a child class, here is my code, the problem is that every time this code is called, a new child object is created instead of update the Parent, so if I call this five times, i have 1 Parent and 5 Child objects, i just need 1 Parent and 1 Child, there is a way to achieve this
class Parent extends RealmObject {
@PrimaryKey
private String someKey;
Child child;
}
class Child extends RealmObject {
private int someValue;
}
final Parent parent = realm.where(parent.class).equalTo("somekey", key)
.findFirst();
realm.executeTransaction(new Realm.Transaction() {
@Override
public void execute(Realm realm) {
Child child = realm.createObject(Child
.class);
child.setSomeValue(value);
parent.setChild(child);
}
});
I'm not entirely sure why you are creating a Child object each time you update the Parent, but if the idea is that the parent should always have a child, then you can do this:
realm.executeTransaction(new Realm.Transaction() {
@Override
public void execute(Realm realm) {
if (parent.getChild() == null) { // Only create a child if it is missing.
Child child = realm.createObject(Child.class);
parent.setChild(child);
}
parent.getChild().setSomeValue(value);
parent.setNotificationConstants(notificationConstants);
}
});
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