Question

我能够成功地将数据插入到mysql数据库中，现在我将我的数据库切换到postgresql并且我正在接受这个挑战

org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [admin_pkey]; nested exception is org.hibernate.exception.ConstraintViolationException: 
could not execute statement

我已经为我的id列确保了generation_auto注释，但仍然存在错误，这是我的类映射

@Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "id")
    private Integer id;

    @Column(unique = true, nullable = false)
    private String name;

    @Column(unique = true, nullable = false)
    private String email;

    @Column(unique = false, nullable = false)
    private String password;

    @Column(unique = false, nullable = false)
    private Date date;

    public Integer getId() {
        return id;
    }

Answer 1

如果要更改数据库，则应相应地更改hibernate配置XML 这是hibernate.cfg.xml：

<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
        <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
        <property name="hibernate.connection.username">postgres</property>
        <property name="hibernate.connection.password">password</property>
        <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/hibernatedb</property>

        <property name="connection_pool_size">1</property>

        <property name="hbm2ddl.auto">create</property>

        <property name="show_sql">true</property>

       <mapping class="org.sample"/>

    </session-factory>
</hibernate-configuration>

org.springframework.dao.DataIntegrityViolationException：无法执行语句; SQL [不适用];约束[admin_pkey];

1 个答案: