Realm. Get subset of inner element based on outer one - realm

Question

There is a structure:
{ "groups": [
{ "gid" : 1,
"elements" : [
{ "eid" : 1 },
{ "eid" : 2 }
]
},
{ "gid" : 2,
"elements" : [
{ "eid" : 11 },
{ "eid" : 22 }
]
}
{ "gid" : 3,
"elements" : [
{ "eid" : 21 },
{ "eid" : 32 }
]
}
]
}
I understand how to get all groups:
RealmResults<Group> all = realm.where(Group.class).findAll();
Also I could get all elements or all elements in a group.
But how could I query all element from groups that have id > 1?
RealmResults<Group> allFilteredGroups = realm.where(Group.class).greaterThan("gid", 1).findAll();
Is it possible to retrive all elements from all allFilteredGroups by one query, smth like
realm.where(Element.class).equalsTo(???, allFilteredGroups).findall() ?

Answer 1

I'm not quite sure what you mean by "to retrieve all elements". allFilteredGroups has all the Group objects. As they are linked to the Elements objects, you can easily iterate through them:
for(Group group : allFilteredGroups) {
for(Element element : group.getElement()) {
Log.d("TEST", "eid = " + element.eid);
}
}
There is currently no easy way to flatten the last and have all the Element objects in a single RealmResults.