Array of Primitives: Support queries

Split from https://github.com/realm/realm-java/pull/5031

We need to add support for arrays of values to RealmQuery. Based on API discussions we don’t want to add a ton of extra methods, so instead we are going to use the empty field name "" when querying arrays of primitives.

E.g

public class Person extends RealmObject {
  public RealmList<String> names;
}

// Query list in object
RealmResults<Person> results =  realm.where(Person.class).equalTo("names", "John").findAll();

This also include support for RealmList.min()/max()/average()/sum()/minDate()/maxDate() which depends on the query system

Out of scope for now

// Query list directly
Person p = getPerson();
RealmResults<String> results = p.names.where().like("", "Jo*").findAll();

[aritrobanerjee93]

Hi, Any update on this much needed feature? It’s 2019 and I don’t think using a wrapper seems agreeable anymore. If anyone has a workaround apart from flatlists, I would love to learn!

[Zhuinden]

@mgohin another option of course is to map the list into a single string field with some convention like |value1|value2|value3| and then contains("flatList", "|${searchValue}|")

But that’s lame that we still have to do that, i agree