Given the following test:
// setup
OClass driver = getDatabase().getMetadata().getSchema().createClass(DRIVER);
OClass car = getDatabase().getMetadata().getSchema().createClass(CAR);
car.createProperty(DRIVERS, OType.EMBEDDEDLIST, driver);
OClass team = getDatabase().getMetadata().getSchema().createClass(TEAM);
team.createProperty(CARS, OType.EMBEDDEDSET, car);
// exercise
ODocument alonso = new ODocument(DRIVER).field("name", "Fernando Alonso").field("nationality", "Spanish")
.field("yearOfBirth", 1981);
ODocument button = new ODocument(DRIVER).field("name", "Jenson Button").field("nationality", "british")
.field("yearOfBirth", 1980);
ODocument mp30 = new ODocument(CAR).field(DRIVERS, Arrays.asList(new ODocument[] { alonso, button }));
Set<ODocument> cars = new HashSet<>();
cars.add(mp30);
ODocument mclarenF1Team = new ODocument(TEAM).field(CARS, cars);
mclarenF1Team.save();
// verify
assertEquals(1, getDatabase().countClass(TEAM));
assertEquals(1, getDatabase().countClass(CAR));
assertEquals(2, getDatabase().countClass(DRIVER));
The second assertion fails:
java.lang.AssertionError: expected:<1> but was:<0> at org.junit.Assert.fail(Assert.java:88) at org.junit.Assert.failNotEquals(Assert.java:834) at org.junit.Assert.assertEquals(Assert.java:645) at org.junit.Assert.assertEquals(Assert.java:631) at foo.orientdb.dataaccessapi.StoreJSonIT.testSchemaFull(StoreJSonIT.java:68)
Why does it fail?
The properties CAR and DRIVER are created as embedded list and embedded set, shouldn't a single save in mclarenF1Team do a cascade save for the embedded documents?
Embedded List/Set means that the documents you create will be embedded (Saved) in the parent document and not in his own class/cluster.
IF you want to achieve that behaviour you should use links
See here