java - '...jdoDetachedState' gwt 项目中的未知列 'field list'

Question

我有奇怪的问题。当我在没有 gwt 的情况下运行我的项目时，只是 hibernate - 一切正常，但是当我在 gwt 中插入代码时，这个异常就出现了。

PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1054, SQLState: 42S22
PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: Unknown column 'employee0_.jdoDetachedState' in 'field list'

这是我做的

List<Employee> list = session.createQuery("FROM Employee").list();

我的查询看起来像:

 Hibernate: 
    select
    employee0_.id as id1_1_,
    employee0_.born as born2_1_,
    employee0_.department as departme3_1_,
    employee0_.first_name as first_na4_1_,
    employee0_.jdoDetachedState as jdoDetac5_1_,
    employee0_.post as post8_1_,
    employee0_.salary as salary6_1_,
    employee0_.second_name as second_n7_1_ 
    from
    employee employee0_

还有我类(class)的样子

@Entity
@Table(name="employee")
public class Employee implements Serializable{

    @Id
    public Integer id;

    @Column(nullable=false)
    public String first_name;

    @Column(nullable=false)
    public String second_name;

    @OneToOne
    @JoinColumn(name = "post")
    public Position post;

    @Column(nullable=false)
    public String born;

    @Column(nullable=false)
    public Integer salary;

    public String department;

    public Employee(){}

    ... public getters and setters
}

其他查询有效，但这个不行。我找到了 https://stackoverflow.com/questions/16319853/unexpected-jdodetachedstate-column-when-using-hibernate-in-gwt-project但无法理解它如何提供帮助。

Answer 1

我遇到了同样的问题，我在 this web-site 找到了解决方案添加这些行:

@Transient 
protected Object[] jdoDetachedState; 

这对我很有帮助。也许，这对任何人都有帮助。