QueryDSL / JPQL : how to build a join query?

Question

I\'ve tried to read through the QueryDSL docs but I am still very confused. I\'m accustomed to writing a lot of SQL, but this is my first real crack at using QueryDSL w/ JPQL (

Answer 1

This should work

public Contact getContact(long providerId, long contactId) {
    QProvider provider = QProvider.provider;
    QContact contact = QContact.contact;
    return new JPAQuery(em).from(provider)
        .innerJoin(provider.contact, contact)
        .where(provider.id.eq(providerId), contact.id.eq(contactId))
        .singleResult(contact);
}