PlayFramework 2.x Ebean query match manytomany property from a collection

Question

I have a model object that looks like this:

@SuppressWarnings("serial")
@Entity
@Table(name = "selections")
public class Selection extends Model {

    ....

    @ManyToMany
    private Set<Market> markets;

    ....
}

Where Selection and Market both have id properties and static Finder<Long, *> find() methods.

And i'm trying to find all the Selection objects which contain a Market that's within a Set.

@Override @Transactional(readOnly = true) public List<Selection> findSelections(Set<Market> markets) {

    // Query?
    return Selection.find().where()...findList();
}

I know i can do something like:

return Selection.find().where().eq("markets.id", market.id).findList();

to find a single market object - but what about finding those objects from the Set? Without iterating over the Set?

Answer 1

return Selection.find().where().in("markets",markets).findList();

Answer 2

I have been struggling with the same problem, and after reading another SO question and the Ebean's Interface Query documentation I came out with this:

// Prepare the OQL query string
String oql = "find selection " +
    "where markets.id in (:marketList) " +
    "group by id " +
    "having count(distinct markets.id) = :marketCount";

// Create the query
Query<Selection> query = Selection.find.setQuery(oql);

// Set the list of market IDs
List<Long> marketIds = Arrays.asList(1, 30, 9, 15, 6);

// Set query parameters (list of market IDs and how many they are)
query.setParameter("marketList", marketIds);
query.setParameter("marketCount", marketIds.size());

// Get the matching results
List<Selection> selections = query.findList();

I am using Play 2.4.2 with sbt-play-ebean plugin version 2.0.0 , wich provides avaje-ebeanorm version 6.8.1 .

For some extra functionality you might be interested in reading this question .