I currently have a situation where I have two entities, Movie and Actor, that are linked together in a many-to-many relationship.
Here is the definition of the Movie entity:
public class Movie {
@Id
private String imdbId;
@ManyToMany(cascade = CascadeType.ALL,fetch = FetchType.EAGER, targetEntity = Actor.class)
private Set<Actor> actor;
}
And this is how the Actor entity is defined:
public class Actor {
@Id
private String actorId;
}
In my RESTful API, I am posting JSON data to my MovieController. The structure of the JSON data is as follows:
{
"imdbId": "tt2395424",
"actor" : [{"actorId" : "0001"}, {"actorId" : "0002"}]
}
This functionality works perfectly fine and the actors are populated automatically. However, when I try to insert a new movie with the same actorId, it throws an error saying that the actor already exists. I am quite confused because according to my understanding, Hibernate should compare the id before insertion and only insert if it's not present. Can you please help me understand where I might be going wrong?