Question

这是我的EmployeeDetailEntity.java课程。其中我使用@OnetoOne注释与名为GenderEntity的其他实体建立关系。以下是我的EmployeeDetailEntity

@OneToOne
@JoinColumn(name="GenderEntity",referencedColumnName="id")
private GenderEntity gen;

这是我的GenderEntity.java课程，其中我列出了与EmployeedetailEntity.java（ReferencedById="id"）的关系，其中id是主键。

@OneToOne(mappedBy="gen",cascade=CascadeType.ALL)
private EmployeeDetailEntity empdtl;

从实体生成表时我收到错误（生成失败请参阅控制台以获取更多信息），我的控制台如下：

Exception [EclipseLink-93] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The table [GENDERENTITY] is not present in this descriptor.
Descriptor: RelationalDescriptor(entities.PatientTypeEntity --> [DatabaseTable(PATIENTTYPEENTITY)])

Exception [EclipseLink-93] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The table [SHOPPROFILEENTITY] is not present in this descriptor.
Descriptor: RelationalDescriptor(entities.EmployeeDetailEntity --> [DatabaseTable(EMPLOYEEDETAILENTITY)])

Exception [EclipseLink-41] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: A non-read-only mapping must be defined for the sequence number field.
Descriptor: RelationalDescriptor(entities.PatientTypeEntity --> [DatabaseTable(PATIENTTYPEENTITY)])

Exception [EclipseLink-41] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: A non-read-only mapping must be defined for the sequence number field.
Descriptor: RelationalDescriptor(entities.EmployeeDetailEntity --> [DatabaseTable(EMPLOYEEDETAILENTITY)])

描述符例外：

Local Exception Stack: 
Exception [EclipseLink-93] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The table [GENDERENTITY] is not present in this descriptor.
Descriptor: RelationalDescriptor(entities.PatientTypeEntity --> [DatabaseTable(PATIENTTYPEENTITY)])

Answer 1

问题出在下面一行：

@JoinColumn(name="GenderEntity",referencedColumnName="id")

执行以下操作：

有趣的部分是@JoinColumn注释，它指定作为外键（EMPLOYEE_DETAIL_ID）的本地列以及它对应的外表的哪一列（EMPLOYEE_ID）

所以我假设您在GENDER表中有EMPLOYEE_DETAIL_ID，这是一个重写EMPLOYEE_DETAIL表主键的外键，而EMPLOYEE_ID是EMPLOYEE_DETAIL中的列表。因此，您的最终映射将如下所示：

@JoinColumn(name="EMPLOYEE_DETAIL_ID",referencedColumnName="EMPLOYEE_ID ")

并确保“gen”是EmployeeDetailEntity.java中的属性，如下所示：

GenderEntity gen;

它使用jpa生成实体时显示错误

1 个答案: