Hibernate尝试在创建表之前修改它

Question

简单的问题：我正在使用MySQL5Dialect数据库在Spring Boot 2.2.5上运行。一切都很好，直到我在Slide实体中添加了@ManyToOne注释引用User实体 - 现在Hibernate无法创建表，因为它创建了users表，然后尝试修改还未创建的slides表。我做错了什么？

@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;
}

Hibernate配置的细节：

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

还有错误信息：

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

- PaulJK

---

我在你的“错误”中没有看到任何错误。 - Stultuske

抱歉，核心错误是java.sql.SQLSyntaxErrorException: 表 '32293814_alumnicemba.slides' 不存在。 - PaulJK

只需再次尝试运行应用程序，它就会正常工作。确保您拥有一个名为SlideRepository的接口。 - DEV

不，它不会正常工作。问题在于每次运行时都会出现：Hibernate试图修改尚未创建的表。是的，我当然有存储库接口。拜托了。 - PaulJK

Answer 1

找到了问题：

private int order;

"order"在这里不被允许作为字段名称，Hibernate在尝试创建幻灯片表时遇到错误，但未记录该错误。我将字段重命名为"sorting"，现在可以正常工作。

- PaulJK