CODEWITHSUNDEEP
javahibernatemany-to-many
NimChimpsky
NimChimpsky

Reputation: 47300

Many to many with Hibernate and annotations for self referencing

My brain is starting to hurt thinking about this, is it as simple as:

@ManyToMany(mappedBy = "following", cascade = CascadeType.ALL)
private Set<User> followers = new HashSet<User>();

@ManyToMany(mappedBy = "followers", cascade = CascadeType.ALL)
private Set<User> following = new HashSet<User>();

Upvotes: 16

Views: 9967

Answers (1)

jenson-button-event
jenson-button-event

Reputation: 18961

Something like:

@ManyToMany(mappedBy = "following", cascade = CascadeType.ALL)
@JoinTable(name="UserRel", 
                joinColumns={@JoinColumn(name="ParentId")}, 
                inverseJoinColumns={@JoinColumn(name="UserId")})
private Set<User> followers = new HashSet<User>();

@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name="UserRel", 
                joinColumns={@JoinColumn(name="UserId")}, 
                inverseJoinColumns={@JoinColumn(name="ParentId")})
private Set<User> following = new HashSet<User>();

Upvotes: 16

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