Question

这里的问题很简单：我正在使用MySQL5Dialect在mySQL数据库上运行Spring Boot 2.2.5。直到我向引用用户实体的Slide实体添加@ManyToOne批注，一切都变了样-现在Hibernate无法创建表，因为它创建了users表，然后尝试更改尚未创建的slides表。我做错了什么？

用户：

@Entity
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@ToString
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private boolean enabled;
    private String token;
    private String username;
    private String password;
    private String role;
    private String name;
    private String surname;
    private String email;
    private boolean emailVisible;
    private String phone;
    private boolean phoneVisible;
    private int cohortNumber;
    private String company;
    private String position;
    private String linkedIn;
    private String function;
    private String bio;
    private String membership;
    private Date membershipSince;
    private Date membershipUntil;
}

幻灯片：

@Entity
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@ToString(exclude = "editor")
@Table(name = "slides")
public class Slide {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    private boolean visible;
    private int order;
    private Date edited;

    @ManyToOne
    @JoinColumn(name = "editor_id")
    private User editor;

    private String title;
    private String text;
    private String picture;
}

休眠配置细节：

spring.jpa.hibernate.ddl-auto = update
spring.datasource.initialization-mode=always
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

错误：

Hibernate: create table users (id integer not null auto_increment, bio varchar(255), cohort_number integer not null, company varchar(255), email varchar(255), email_visible bit not null, enabled bit not null, function varchar(255), linked_in varchar(255), membership varchar(255), membership_since datetime, membership_until datetime, name varchar(255), password varchar(255), phone varchar(255), phone_visible bit not null, position varchar(255), role varchar(255), surname varchar(255), token varchar(255), username varchar(255), primary key (id)) engine=MyISAM
Hibernate: alter table slides add constraint FKobqxptfxg36ls278o63ouq369 foreign key (editor_id) references users (id)
2020-08-11 14:27:48.201  WARN 8224 --- [  restartedMain] o.h.t.s.i.ExceptionHandlerLoggedImpl     : GenerationTarget encountered exception accepting command : Error executing DDL "alter table slides add constraint FKobqxptfxg36ls278o63ouq369 foreign key (editor_id) references users (id)" via JDBC Statement
...
Caused by: java.sql.SQLSyntaxErrorException: Table '32293814_alumnicemba.slides' doesn't exist

Answer 1

发现问题：

private int order;

“ order”在此处不允许作为字段名称，并且Hibernate在尝试创建幻灯片表但未记录该错误时遇到错误。我已将该字段重命名为“ sorting”，并且现在可以使用。

Hibernate在创建表之前尝试更改表

1 个答案: