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POJPA Hibernate many-to-many cascading
 

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    <p>I am using JPA 2.0 and hibernate. I have a User class and a Group class as follows:</p> <pre><code>public class User implements Serializable { @Id @Column(name="USER_ID") private String userId; @ManyToMany @JoinTable(name = "USER_GROUP", joinColumns = { @JoinColumn(name = "GROUP_ID") }, inverseJoinColumns = { @JoinColumn(name = "USER_ID") } ) private Set&lt;Group&gt; groupList; //get set methods } public class Group { @Id @Column(name="GROUP_ID") private String groupId; @ManyToMany(mappedBy="groupList") private Set&lt;User&gt; memberList; //get set methods } </code></pre> <p>And then, I create a user and group and then assign the user to the group.</p> <p>What I want to have is when I delete the group, the group will be deleted (of course) and all the user-group relationship that the group has will be automatically deleted from the USER_GROUP join table but the user itself is not deleted from the USER table.</p> <p>With the code I have above, only the row in the GROUP table will be deleted when I delete a group and the user will still have an entry to the deleted group in the USER_GROUP join table.</p> <p>If I put cascade in the User class like this:</p> <pre><code>@ManyToMany(cascade=CascadeType.ALL) @JoinTable(name = "USER_GROUP", joinColumns = { @JoinColumn(name = "GROUP_ID") }, inverseJoinColumns = { @JoinColumn(name = "USER_ID") }) private Set&lt;Group&gt; groupList; </code></pre> <p>When I delete the group, the user will be deleted as well!</p> <p>Is there any way to achieve what I want?</p>
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