How to separate Realm Object into two and get them into one variable? - realm

Question

My goal to divide Realm.Object, so we can reuse specific object in different place. To reduce storage use.
The practical use would be:
call realm.objects("ChatList") to get the lastMessage value, without the need to get all of Message objects.
e.g reusing User Object. A User Object can be used in Message Object and ChatList Object.
User Object
const UserSchema: Realm.Object = {
name: "User",
properties: {
user: "string",
displayName: "string",
}
}
Message Object
const MessageObject: Realm.Object = {
name: "Message",
properties: {
user: "User",
message: "string",
}
}
ChatList Object
const ChatListSchema: Realm.Object = {
name: "ChatList",
properties: {
name: "string",
lastMessage: "Message",
}
}
What I've did:
I have read about Realm Data Model > Relationsihp. It requires to explicitly define it in the properties
e.g.
const User: Realm.Object = {
name: "User",
properties: {
name: "string",
tasks: "Task[]",
}
};
const Tasks: realm.Object = {
name: "Task",
properties: {
text: "string",
}
}
However, I am not sure how to link Task to other object. e.g if I use it like this
const write = () => {
realm.write(() => {
realm.create("User", {
name: "Jack",
tasks: [
{
text: "Say 1",
},
],
});
});
}