EclipseLink - 非实体作为关系属性中的目标实体

Question

我使用的是Netbeans IDE 8.0.2和eclipselink 2.5.2.在打开连接时,这种情况发生在下面,问题是每次都不会发生这种情况.异常"Departmento"中描述的实体完全遵循其他类的模式,即我们的系统已经包含大约500个实体类,并且仅在新类中发生此异常.该实体是由Netbeans的"数据库实体类"选项生成的,并添加到持久化XML ...

引发者:javax.persistence.PersistenceException:异常[EclipseLink-28018](Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd):org.eclipse.persistence.exceptions.EntityManagerSetupException异常描述:PersistenceUnit [totemPU]的预部署失败.内部异常:异常[EclipseLink-7250](Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd):org.eclipse.persistence.exceptions.ValidationException异常描述:[class entidade.Item]使用非实体[class entidade. Departamento]作为关系属性[field departamento]中的目标实体.

实体Departamento

@Entity
@Table(name = "departamento")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "Departamento.findAll", query = "SELECT d FROM Departamento d"),
@NamedQuery(name = "Departamento.findById", query = "SELECT d FROM Departamento d WHERE   d.departamentoPK.id = :id"),
@NamedQuery(name = "Departamento.findByIdEmpresa", query = "SELECT d FROM Departamento d WHERE d.departamentoPK.idEmpresa = :idEmpresa"),
@NamedQuery(name = "Departamento.findByDescricao", query = "SELECT d FROM Departamento d WHERE d.descricao = :descricao"),
@NamedQuery(name = "Departamento.findByLixo", query = "SELECT d FROM Departamento d WHERE d.lixo = :lixo"),
@NamedQuery(name = "Departamento.findByIp", query = "SELECT d FROM Departamento d WHERE d.ip = :ip")})
public class Departamento implements Serializable {

private static final long serialVersionUID = 1L;
@EmbeddedId
protected DepartamentoPK departamentoPK;
@Basic(optional = false)
@Column(name = "descricao")
private String descricao;
...
Getters() and Setters()

实体项目

@Entity
@Table(name = "item")
public class Item implements Serializable {

@EmbeddedId
protected ItemPK itemPK;
@JoinColumns({
    @JoinColumn(name = "departamento_id", referencedColumnName = "id"),
    @JoinColumn(name = "departamento_id_empresa", referencedColumnName = "id_empresa")})
@ManyToOne(optional = true)
private Departamento departamento;
...
Getters() and Setters()

persistence.xml中

<persistence-unit name="totemPU" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>entidade.Departamento</class>
<class>entidade.item</class>
... More classes ...
<properties>
  <property name="javax.persistence.jdbc.url" value="jdbc:mysql://xxx"/>
  <property name="javax.persistence.jdbc.password" value="xxx"/>
  <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
  <property name="javax.persistence.jdbc.user" value="xxx"/>
  <property name="javax.persistence.jdbc.autoReconnect" value="true"/>
  <property name="eclipselink.logging.session" value="false"/>
  <property name="eclipselink.logging.level" value="OFF"/>
  <property name="eclipselink.weaving" value="static"/>
  <property name="eclipselink.query-results-cache" value="false"/>
</properties>

在相同的persistence.xml中,有三个持久性单元.

Answer 1

当我忘记在我的persistence.xml中添加另一个实体尝试使用的类时,我通常会看到此错误.确保您传入的用于创建EntityManagerFactory的持久性单元名称是您想要的名称(totemPU).它似乎可能使用包含entidade.item而不是entidade.Departamento的持久性单元.