Question

我已经在我的数据库中重命名了列（从configuration_SYSTEM_ID到SYSTEM_ID），并将AttributeOverride注释添加到了我的AbstractSubConfiguration类。但是hibernate会忽略此批注并继续使用旧列名生成查询（configuration_SYSTEM_ID而不是SYSTEM_ID）。

我的课程如下：

AbstractSubConfiguration.java

       @MappedSuperclass
        @IdClass(Configuration.class)
        public class AbstractSubConfiguration implements Dto, Serializable {
            private static final long serialVersionUID = -6271877313478924753L;

            @Id
            @OneToOne(fetch = FetchType.LAZY)
    @AttributeOverride(name = "systemId", column = @Column(name = "SYSTEM_ID"))
            private Configuration configuration;

            public AbstractSubConfiguration() {
                super();
            }

            public AbstractSubConfiguration(final Configuration configuration) {
                super();
                this.configuration = configuration;
            }

            @XmlTransient
            public final Configuration getConfiguration() {
                return configuration;
            }

            public final void setConfiguration(final Configuration configuration) {
                this.configuration = configuration;
            }

        }

Configuration.java

    Entity(name = "CONFIGURATION")
    public class Configuration implements Dto, Serializable {
        private static final long serialVersionUID = 6601197795258837065L;

        @EmbeddedId
        private ConfigurationId configurationId;

        @Column(name = "CONFIGURATION_NAME")
        private String configurationName;

        @OneToOne(cascade = CascadeType.PERSIST, mappedBy = "configuration", fetch = FetchType.EAGER)
        private BasicConfiguration basicConfiguration;
        @OneToOne(cascade = CascadeType.PERSIST, mappedBy = "configuration", fetch = FetchType.EAGER)
        private AdvancedConfiguration advancedConfiguration;

.....


...
}

ConfigurationId.java

@Embeddable
public class ConfigurationId implements Serializable {
    private static final long serialVersionUID = -5123943430808049180L;

    private SystemId systemId;
    @Column(name = "CONFIGURATION_ID")
    private int configurationId;

    public ConfigurationId(final SystemId systemId, final int configurationId) {
        super();
        this.systemId = systemId;
        this.configurationId = configurationId;
    }
    ....

    ....
}

结果我有一个错误2695 [main] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - 未知列＆＃39; tes0_.configuration_SYSTEM_ID＆＃39;在＆＃39;字段列表＆＃39;

Answer 1

来自doc @AttributeOverride

java.lang.String名称（必需）如果正在使用基于属性的访问，则覆盖其映射的属性的名称，或者名称字段，如果使用基于字段的访问。

在您的地图中，我看不到systemId属性，而是看到configurationId属性

修改

根据@AttributeOverride中的修改名称，应为configuration.systemId

请参阅java doc的带有zipcode的示例：

@Embeddable public class Address { protected String street; protected String city; protected String state; @Embedded protected Zipcode zipcode; } @Embeddable public class Zipcode { protected String zip; protected String plusFour; } @Entity public class Customer { @Id protected Integer id; protected String name; @AttributeOverrides({ @AttributeOverride(name="state", column=@Column(name="ADDR_STATE")), @AttributeOverride(name="zipcode.zip", column=@Column(name="ADDR_ZIP")) }) @Embedded protected Address address; ... }

Answer 2

以这种方式解决了这个问题：

       @MappedSuperclass
        @IdClass(Configuration.class)
        public class AbstractSubConfiguration implements Dto, Serializable {
            private static final long serialVersionUID = -6271877313478924753L;

            @Id
            @OneToOne(fetch = FetchType.LAZY)
    @JoinColumns({
        @JoinColumn(name = "SYSTEM_ID", referencedColumnName = "SYSTEM_ID"),
        @JoinColumn(name = "configuration_CONFIGURATION_ID", referencedColumnName = "CONFIGURATION_ID")})            
private Configuration configuration;


...


....
}

Hibernate在列重命名后生成旧查询

2 个答案: