mybatisplus code generator generator pits

Since the first use mybatisplus and new learning java to do the project, I do not understand these things.

The easiest serviceImpl of getById have found out something really embarrassing.

Read a few answers online. Statistics about:

1. The data table has changed, but the entity does not make changes https://blog.csdn.net/Tomwildboar/article/details/89530083

2. is the primary key of the wrong type https://blog.csdn.net/BennyShi1998/article/details/85218936

Feel it is quite tricky, the results of the investigation a bit, are not these problems!

Suddenly a eureka moment, this entity primary key seems to really not quite right.

@Data
@EqualsAndHashCode(callSuper = true)
@Accessors(chain = true)
public class Role extends BaseEntity {

    @TableField(exist = false)
    private static final long serialVersionUID=1L;
private String name;

    private Integer sort;

    private String description;


}

 

Which is what serialVersionUID = 1L Ghosts, I obviously id of the database!

This is a serialized version of id, regardless of him. Coupled with their own id

    @TableId(type = IdType.AUTO)
    private Long id;

Compiler has passed, getById it took to the entity, comfortable