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POHibernate does not delete orphans on OneToMany
 

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  1. POHibernate does not delete orphans on OneToMany
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    <p>I have the following pretty simple one to many relations:</p> <p>Team has a Set of players:</p> <pre><code>@Entity(name = "TEAM") @Access(AccessType.PROPERTY) public class Team{ private Integer id; private String name; private Set&lt;Player&gt; players ; @Id @Column(name = "id") public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @Column(name = "team_name") public String getName() { return name; } public void setName(String name) { this.name = name; } @OneToMany(cascade = {CascadeType.ALL},orphanRemoval=true) @JoinColumn(name = "TEAM_ID") public Set&lt;Player&gt; getPlayers() { return players; } public void setPlayers(Set&lt;Player&gt; players) { this.players = players; } } </code></pre> <p>And each player has a unique id &amp; name.</p> <pre><code>@Entity(name = "PLAYER") @Access(AccessType.PROPERTY) public class Player implements Serializable{ private int id; private String name; @Id @Column(name = "id") public int getId() { return id; } public void setId(int id) { this.id = id; } @Column(name = "player_name") public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public boolean equals(Object obj) { return id == ((Player)obj).id; } @Override public int hashCode() { return id; } } </code></pre> <p>I run a very simple code:</p> <pre><code>Team team = createTeam(3) // creates team with 3 players ids={1,2,3} session.saveOrUpdate(team); ... private Team createTeam(int players) { Team team = new Team(); team.setName("Bears"); team.setId(1); for(int i=1 ; i&lt;=players; ++ i){ Player player = new Player(); player.setId(i); player.setName("Player"+i); team.addPlayer(player); } return team; } </code></pre> <p>And I get the following as expected:</p> <ul> <li>Hibernate: select team_.id, team_.team_name as team2_0_ from TEAM team_ where team_.id=?</li> <li>Hibernate: select player_.id, player_.player_name as player2_1_ from PLAYER player_ where player_.id=?</li> <li>Hibernate: select player_.id, player_.player_name as player2_1_ from PLAYER player_ where player_.id=?</li> <li>Hibernate: select player_.id, player_.player_name as player2_1_ from PLAYER player_ where player_.id=?</li> <li>Hibernate: insert into TEAM (team_name, id) values (?, ?)</li> <li>Hibernate: insert into PLAYER (player_name, id) values (?, ?)</li> <li>Hibernate: insert into PLAYER (player_name, id) values (?, ?)</li> <li>Hibernate: insert into PLAYER (player_name, id) values (?, ?)</li> <li>Hibernate: update PLAYER set TEAM_ID=? where id=? Hibernate: update PLAYER set TEAM_ID=? where id=? Hibernate: update PLAYER set TEAM_ID=? where id=?</li> </ul> <p>Then later I do:</p> <pre><code>Team team = createTeam(2) // creates team with 2 player ids={1,2} session.saveOrUpdate(team); </code></pre> <p>And expect the orphan players to be deleted but I get:</p> <ul> <li>Hibernate: select team_.id, team_.team_name as team2_0_ from TEAM team_ where team_.id=?</li> <li>Hibernate: select player_.id, player_.player_name as player2_1_ from PLAYER player_ where player_.id=?</li> <li>Hibernate: select player_.id, player_.player_name as player2_1_ from PLAYER player_ where player_.id=?</li> <li>Hibernate: update PLAYER set TEAM_ID=null where TEAM_ID=?</li> <li>Hibernate: update PLAYER set TEAM_ID=? where id=?</li> <li>Hibernate: update PLAYER set TEAM_ID=? where id=?</li> </ul> <p>Which leaves the orphan player (id=3) disconnected but not deleted... Any ideas what I do wrong?</p>
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    1. COWhat is `createTeam()` method doing?
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    2. COcreates a team with players
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    3. COIt might be related or not but we test it on HSQL
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