@Test
public void one_to_many_join() {
Record joined =
RecordJoins.join(authors)
.on(id)
.to(authorId)
.oneToMany(books, authored)
.filter(authorName.is("Alan Goodyear"))
.findFirst()
.get();
assertThat(authored.extract(joined), hasItems(cromulenceOfTruths, amorousEncounters));
}
@Test
public void three_way_join() {
List<Record> joined =
RecordJoins.join(RecordJoins.join(books).on(authorId).to(id).manyToOne(authors))
.on(publisherId)
.to(id)
.manyToOne(publishers)
.map(r -> r.select(publisherName, authorName, bookName))
.filter(authorName.is("Alan Goodyear"))
.collect(Collectors.toList());
assertThat(
joined,
CoreMatchers.hasItems(
$$(
bookName.of("Amorous Encounters"),
authorName.of("Alan Goodyear"),
publisherName.of("Bills And Moon")),
$$(
bookName.of("The Cromulence Of Truths"),
authorName.of("Alan Goodyear"),
publisherName.of("Servo"))));
}