I made a mistake in placing a foreign key.

but I don't really get what's wrong. Can I place @JoinColumn and @ManyToOne together?

I have followed what shown on the book

Could somebody help me out? giving me some hint on fixing it. thanks!

the error stall the deployment and do a rollback.

2 entities and part of the stack trace posted.

package com.h2o;

import javax.persistence.*;

@Entity

public class ImageBase {

    @Id @GeneratedValue(strategy=GenerationType.SEQUENCE)

    private Long id;

    @Column(unique=true)

    private String imgFile;

    @Column(nullable=true)

    private String imgOriginalFile;

    @ManyToOne

    @JoinColumn

    private h2oUser user;

    //setters and getters

}

package com.h2o;

import javax.persistence.*;

import java.util.*;

@Entity

@IdClass(h2oUserId.class)

@NamedQuery(name="findAllUsers", query="SELECT h FROM h2oUser h")

public class h2oUser {

    @Id @GeneratedValue(strategy=GenerationType.SEQUENCE) @Column(name="H2O_ID")

    private Long id;

    @Id

    @Column ( nullable = false)

    private String email;

    @Column ( nullable = false)

    private String nickName;

    @Column ( nullable = false)

    private String password;

    private String basePath;

    private String avatorPath;

    private boolean activated;

    @Temporal(TemporalType.DATE)

    private Date createDate;

    @Transient

    private static final String LARGE = "original";

    @Transient

    private static final String SMALL = "thumbernail";

    @OneToMany(mappedBy="h2oUser")

    private Collection<ImageBase> images;

    //getters and setters

}

Caused by: org.hibernate.MappingException: Could not determine type for: com.h2o.h2oUser, at table: ImageBase, for columns: [org.hibernate.mapping.Column(user)]

    at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:304)

    at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:288)

    at org.hibernate.mapping.Property.isValid(Property.java:216)

    at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:467)

    at org.hibernate.mapping.RootClass.validate(RootClass.java:268)

    at org.hibernate.cfg.Configuration.validate(Configuration.java:1287)

    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1729)

    at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:84)

    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)

    ... 9 more