mysql 非实物_jpa – EclipseLink – 非实体作为关系属性中...

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 …

Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services – 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.EntityManagerSetupException

Exception Description: Predeployment of PersistenceUnit [totemPU] failed.

Internal Exception: Exception [EclipseLink-7250] (Eclipse Persistence Services – 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException

Exception Description: [class entidade.Item] uses a non-entity [class entidade.Departamento] as target entity in the relationship attribute [field departamento].

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

org.eclipse.persistence.jpa.PersistenceProvider

entidade.Departamento

entidade.item

... More classes ...

在相同的persistence.xml中,有三个持久性单元.