Hibernate query inner join on unmapped table (unidirectional)

Question

I do have a problem query problem with spring and hibernate.

I've got a class called Car which maps ManyToMany to my class Inventory. Inventory btw holds no references to the Car class. This causes spring and hibernate to create the mapping table car_loading with a fk to the car and a fk to the inventory table.

I now want to query the inventory for a special car:

String squery = "SELECT i from Inventory i, car_loading loads WHERE i.id = loads.loading AND car = ?";

But I am getting the exception

org.hibernate.hql.ast.QuerySyntaxException: car_loading is not mapped

FYI: Hibernate doesn't support the JOIN ON xa = yb leading me to do it that way...

Thanks inn advance for any help!

EDIT - My Mapping

public class Car {

    @OneToOne
    private Driver driver;

    @ManyToMany(cascade=CascadeType.ALL)
    private List<Inventory> loading = new ArrayList<Inventory>();   

    @Temporal(TemporalType.TIMESTAMP)
    @DateTimeFormat(pattern="dd:MM:yyy HH:mm")
    private Date lastModified;
    //...
}

public class Inventory {

    private Integer shouldAmount;

    private Integer minAmount;

    private Integer isAmount;

    @Temporal(TemporalType.TIMESTAMP)
    @DateTimeFormat(pattern="dd:MM:yyy HH:mm")
    private Date lastModified;
    //..
}

Answer 1

I saw this question and wanted to updated it. I did it the wrong way around. I could simply query the car and return all inventorys within this car. Because there is a relation from car to inventory, but not the other way around. So query a specific car and simply return the inventory list attribute did it for me...

Answer 2

You should never use the mapping table explicitly, hibernate adds it automatically when you use entity's properties. For your situation the query should look like:

"select c.loading from Car c where c = ?"

or just get a car object Car car = session.get(Car.class, id) , then use getter as ususal Collection<Inventory> loading = car.getLoading();