java - Hibernate @ManyToMany 与复合键的映射

Question

我正在尝试映射两个表之间的多对多关系，两个表都有复合主键

LSFOCTB which primary key is composed of : LSFOC_CODSOC,LSFOC_CODLSC,LSFOC_CODFOC

LSFORTB which primary key is composed of : LSFOR_CODSOC,LSFOR_CODLSC,LSFOC_CODFOR

The table in charge of the ManyToMany relationship is :

LSFCFTB, with : LSFCF_CODSOC,LSFCF_CODLSC,LSFCF_CODFOC,LSFCF_CODFOR

所以，在hibernate模型映射LSFOCTB中，我尝试了:

@ManyToMany(targetEntity = package.LSFOCTB.class, cascade = { CascadeType.PERSIST,
            CascadeType.MERGE })
    @JoinTable(name = "LSFCFTB", joinColumns = {
            @JoinColumn(name = "LSFCF_CODLSC", referencedColumnName = "LSFOC_CODLSC"),
            @JoinColumn(name = "LSFCF_CODFOC", referencedColumnName = "LSFOC_CODFOC"),
            @JoinColumn(name = "LSFCF_CODSOC", referencedColumnName = "LSFOC_CODSOC") }, 
    inverseJoinColumns = { @JoinColumn(name = "LSFCF_CODLSC", referencedColumnName = "LSFOR_CODLSC"),
            @JoinColumn(name = "LSFCF_CODFOR", referencedColumnName = "LSFOR_CODFOR"),
            @JoinColumn(name = "LSFCF_CODSOC", referencedColumnName = "LSFOR_CODSOC") })

在 setter/getter 之前。 但这不会起作用... 尝试访问远程集合时出现的错误是:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [beans-dao.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: Repeated column in mapping for collection: package.LSFOCTB.distantCollection column: LSFCF_CODLSC

是否已经设法使 hibernate 映射适用于多对多关系？ 如果是这样，我的映射有什么问题？ 感谢您的帮助!

Answer 1

问题似乎是您正在创建一个包含 6 列的联接表，并且您的列有重复的名称。您实际上正在创建 2 个名为 LSFCF_CODLSC 的列、2 个名为 LSFCF_CODFOR 的列和 2 个名为 LSFCF_CODSOC 的列。

我建议你尝试一下:

@JoinTable(name = "LSFCFTB", joinColumns = {
                    @JoinColumn(name = "LSFOC_LSFCF_CODLSC", referencedColumnName = "LSFOC_CODLSC"),
                    @JoinColumn(name = "LSFOC_LSFCF_CODFOC", referencedColumnName = "LSFOC_CODFOC"),
                    @JoinColumn(name = "LSFOC_LSFCF_CODSOC", referencedColumnName = "LSFOC_CODSOC") }, 
        inverseJoinColumns = { @JoinColumn(name = "LSFOR_LSFCF_CODLSC", referencedColumnName = "LSFOR_CODLSC"),
                    @JoinColumn(name = "LSFOR_LSFCF_CODFOR", referencedColumnName = "LSFOR_CODFOR"),
                    @JoinColumn(name = "LSFOR_LSFCF_CODSOC", referencedColumnName = "LSFOR_CODSOC") })

或类似的东西(根据您的命名约定)为每列提供唯一的名称。