@Column(s) not allowed on a @ManyToOne property

Question

I have a JPA entity with a property set as

@ManyToOne
@Column(name=\"LicenseeFK\")
private Licensee licensee;

But when I deploy on JBoss 6

Answer 1

@Column

The JPA @Column annotation is for basic entity attributes, like String, Integer, Date.

So, if the entity attribute name differs than the underlying column name, then you need to use the @Column annotation to specify the column name explicitly, like this:

@Column(name="created_on")
private LocalDate createdOn;

@JoinColumn

The @JoinColumn annotation is used to customize a Foreign Key column name, and it can only be used with an entity association.

So, in your case, because you are using a @ManyToOne association, you need to use @JoinColumn:

@ManyToOne(fetch=FetchTYpe.LAZY)
@JoinColumn(name="LicenseeFK")
private Licensee licensee;

Notice that we set the fetch attribute to FetchType.LAZY because, by default, FetchType.EAGER is used, and that's a terrible strategy. For more details about why FetchType.LAZY is a much better default, check out this article.