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POJPA Many to Many cascade problem
 

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    <p>If I create a Customer and Controller, then associate my Controller with a customer it saves fine.</p> <p>If I then remove my controller it doesn't remove the relationship between them. This causes an EntityNotFoundException when I load the Customer.</p> <pre><code>javax.persistence.EntityNotFoundException: Unable to find Controller with id 22 </code></pre> <p>I'd like to know how to map this so that when a Controller is deleted the relationship is also deleted.</p> <p>Database Tables</p> <ul> <li>customer </li> <li>controller</li> <li>customer_controllers - mapping table.</li> </ul> <p>The Controller's id is not getting removed from the customer_controllers mapping table.</p> <pre><code>@Entity public class Customer implements Serializable{ private Integer id; private Set&lt;Controller&gt; controllers; @Id @GeneratedValue public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @ManyToMany(cascade={CascadeType.ALL}) public Set&lt;Controller&gt; getControllers() { return controllers; } public void setControllers(Set&lt;Controller&gt; controllers) { this.controllers = controllers; } } @Entity public class Controller implements Serializable{ private Integer id; private String name; private String abbreviation; @Id @GeneratedValue public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAbbreviation() { return abbreviation; } public void setAbbreviation(String abbreviation) { this.abbreviation = abbreviation; } } </code></pre>
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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