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Senior Pomidor
Asked:2020-01-13 17:04:15 +0000 UTC2020-01-13 17:04:15 +0000 UTC

应使用 insert="false" update="false" 映射 hibernate MappingException 列

  • 772

有一个实体

public class RealEstateType {
private long customer_id;
private String name;
private Customer customerByCustomerId;

@Id
@Column(name = "customer_id", insertable = false, updatable = false)
public long getCustomerId() {
    return customer_id;
}

public void setCustomerId(long id) {
    this.customer_id = id;
}

描述了表

CREATE TABLE db.real_estate_type (
  customer_id BIGINT NOT NULL,
  name CHARACTER VARYING(255),
  FOREIGN KEY (customer_id) REFERENCES db.customer (id)
  MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION
);

哪个customer_id是FOREIGN KEY

@Column(name = "customer_id")Hibernate 在, @Column(name = "customer_id", insertable = false, updatable = false),上抛出异常@Column(name = "customer_id", insertable = true, updatable = false)

amework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [spring.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: Repeated column in mapping for entity: hibernate.model.df.RealEstateType column: customer_id (should be mapped with insert="false" update="false")
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:756)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)

但是，如果您删除customer_id并制作 PK @Id @Column(name = "name")，那么一切正常。

如果我们离开customer_id并进行 PK @Id @Column(name = "name")，我们会得到同样的错误。

向我解释这种行为的原因以及如何解决它？

java

1 个回答

  1. Best Answer

    在这种情况下，注释@Id与其无关，根据异常的文本，看起来第二个字段实际上引用了相同的“customer_id”列。完整显示问题中的实体类，吸气剂上是否有机会private Customer customerByCustomerId;没有带有指向同一列的链接的注释（例如@OneToOne）？如果是这样，则必须将两个字段之一标记为insert="false", update="false"

    • 4

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