HasorDB 寫入策略

有如下表

create table `test_user` (
    `id`          int(11),
    `name`        varchar(255),
    `age`         int,
    `create_time` datetime,
    primary key (`id`)
);

列不允許更新?

如若 ?test_user ?表的 ?create_time ?列不允許被更新，那么需要配置 ?@??Column ???注解 ?update = false? 表示該列不參與更新。

@Table(name = "test_user", autoMapping = false)
public class TestUser {
    @Column(name = "id", primary = true)
    private Integer id;
    @Column("name")
    private String  name;
    @Column("age")
    private Integer age;
    @Column(name = "create_time", update = false) // 列不參與更新
    private Date    createTime;

    // getters and setters omitted
}

Insert 忽略該列

對于某些列新增時想使用數(shù)據(jù)庫的默認(rèn)值忽略來自應(yīng)用的設(shè)置則可采用 insert 屬性

@Table(name = "test_user", autoMapping = false)
public class TestUser {
    @Column(name = "id", primary = true)
    private Integer id;
    @Column("name")
    private String  name;
    @Column("age")
    private Integer age;
    @Column(name = "create_time", insert = false) // 列不參與新增
    private Date    createTime;

    // getters and setters omitted
}