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<a href="https://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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EJB & PostgreSQL FK?
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created by <a href="https://community.jboss.org/people/underflyer">Dirk Robbes</a> in <i>EJB3</i> - <a href="https://community.jboss.org/message/745268#745268">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi everyone,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>im trying to deploy my EJB.jar on my new JBOSS 7.1.1. Well the deploy of the EJB-Container works like a charm. All Tables have been created, correctly. But I am unable to insert any Data in any Table where @ManyToOne Annotations are declared.</p><p>Example: Unidirectional ManyToOne</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">public class A
{
  private Integer id;
  @Id
  @GeneratedValue(stretegy=Generation.TYPE=Auto)
  public Integer getId(){ return id;}
  public void setId(Integer id){ this.id=id;}
}
public class B
{
  private Integer id;
  @Id
  @GeneratedValue(stretegy=Generation.TYPE=Auto)
  public Integer getId(){ return id;}
  public void setId(Integer id){ this.id=id;}
  private A a;
  @ManyToOne
  @JoinColumn(name="a_id", nullable=false)
  public A getA() {return a;}
  public void setA(A a){ this.a=a;}
}
</code></pre><p>this code, creates in PostgresSQL two Tables with (a, b)  with the corresponding Columns (a = id) (b = id, a_id)</p><p>Additional there are "two" (not one) ForeignKey Constraints defined, in Table "b":</p><p>- fk.... foreign key (a_id) references a (id)</p><p>- fk.... foreign key (id) references a(id)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>the second FK-Constraint makes trouble:</p><p>INSERT A (id=1)  = OK!</p><p>INSERT B (id=1, a_id=1) = OK!</p><p>INSERT B (id=2, a_id=1) = ERROR !!!!!!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">DETAIL key (id) = 2 is not present in table "a"
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>where is my fault? </p><p>Thanks for Advice</p></div>
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<p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/745268#745268">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in EJB3 at <a href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2029">Community</a></p>
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