“spring boot not creating all tables – Spring Boot, MySQL, jpa”

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英文:

spring boot not creating all tables - Spring Boot, MySQL, jpa

问题

我已经映射了4个类，然后启动了控制台答案：

.   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.4.RELEASE)

2020-10-27 11:34:29.432  INFO 6612 --- [           main] b.c.n.i.IndividualProjectApplication     : Starting IndividualProjectApplication on Othon-NoteAMD with PID 6612 (D:\programacao\Qualiti\individualProject\target\classes started by othon in D:\programacao\Qualiti\individualProject)
2020-10-27 11:34:29.435  INFO 6612 --- [           main] b.c.n.i.IndividualProjectApplication     : No active profile set, falling back to default profiles: default
2020-10-27 11:34:30.197  INFO 6612 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2020-10-27 11:34:30.232  INFO 6612 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 20ms. Found 0 JPA repository interfaces.
2020-10-27 11:34:31.420  INFO 6612 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-10-27 11:34:31.437  INFO 6612 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
...

然后我逐个注释了其他类并逐个启动，

创建了以下内容：

package br.com.negromonte.individualProject.model;

import java.sql.Date;
import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

@Entity
@Table(name = "client")
public class Client {
    
    @Id
    @Column(name = "cpf", unique = true, nullable = false, length = 20)
    private String cpf;
    
    @Column(name = "name", nullable = false, length = 100)
    private String name;
    
    @Column(name = "email", nullable = false, length = 100)
    private String email;
    
    @Column(name = "password",nullable = false, length = 64)
    private String password;

    @Column(name = "phone",nullable = false, length = 20)
    private String phone;
    
    @Column(name = "birth_day", nullable = false, columnDefinition = "DATE")
    private Date birthday;
    
    @Column(nullable = false)
    private boolean fidelity;
    
    // @OneToMany(fetch = FetchType.LAZY, mappedBy = "Client")
    // private List<Reservation> reservations;
    
    public Client() {
        super();
    }

    // 其他 getter 和 setter 方法...
}

// 同样的格式，省略了其他类的内容

但是这个类：

package br.com.negromonte.individualProject.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name = "prices")
public class Prices {
    
    @Column(nullable = false)
    private double weekday;
    
    @Column(nullable = false)
    private double weekend;
    
    @Column(name = "weekday_fidelity", nullable = false)
    private double weekdayFidelity;
    
    @Column(name = "weekend_fidelity",nullable = false)
    private double weekendFidelity;
    
    // @ManyToOne(fetch = FetchType.EAGER, optional = false)
    // private Hotel hotels;
    
    public Prices() {
        super();
    }

    // 其他 getter 和 setter 方法...
}

// 同样的格式，省略了其他类的内容

以及这个类：

package br.com.negromonte.individualProject.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import java.sql.Timestamp;

@Entity
@Table(name = "reservation")
public class Reservation {
    
    @Column(nullable = false, columnDefinition = "DATETIME")
    private Timestamp checkin;
    
    @Column(nullable = false, columnDefinition = "DATETIME")
    private Timestamp checkout;
    
    @Column(name = "dailys_weekday", nullable = false)
    private int dailysWeekday;
    
    @Column(name = "dailys_weekend", nullable = false)
    private int dailysWeekend;
    
    @Column(name = "total_payed", nullable = false)
    private double totalPayed;
    
    @Column(name = "was_fidelity", nullable = false)
    private boolean wasFidelity;
    
    // @ManyToOne(fetch = FetchType.EAGER, optional = false)
    // private Client client;
    
    // @ManyToOne(fetch = FetchType.EAGER, optional = false)
    // private Hotel hotel;
    
    public Reservation() {
        super();
    }

    // 其他 getter 和 setter 方法...
}

没有被创建。当这两个类被取消注释时，没有任何表被创建。有关模型的问题吗？是否有错误的注解？

英文:

I've mapped 4 classes then started up with this console answer:

  .   ____          _            __ _ _
 /\\ / ___&#39;_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | &#39;_ | &#39;_| | &#39;_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  &#39;  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.4.RELEASE)

2020-10-27 11:34:29.432  INFO 6612 --- [           main] b.c.n.i.IndividualProjectApplication     : Starting IndividualProjectApplication on Othon-NoteAMD with PID 6612 (D:\programacao\Qualiti\individualProject\target\classes started by othon in D:\programacao\Qualiti\individualProject)
2020-10-27 11:34:29.435  INFO 6612 --- [           main] b.c.n.i.IndividualProjectApplication     : No active profile set, falling back to default profiles: default
2020-10-27 11:34:30.197  INFO 6612 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2020-10-27 11:34:30.232  INFO 6612 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 20ms. Found 0 JPA repository interfaces.
2020-10-27 11:34:31.420  INFO 6612 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-10-27 11:34:31.437  INFO 6612 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-10-27 11:34:31.437  INFO 6612 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.38]
2020-10-27 11:34:31.604  INFO 6612 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-10-27 11:34:31.604  INFO 6612 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2110 ms
2020-10-27 11:34:31.908  INFO 6612 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService &#39;applicationTaskExecutor&#39;
2020-10-27 11:34:31.922  INFO 6612 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2020-10-27 11:34:32.942  INFO 6612 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2020-10-27 11:34:32.997  INFO 6612 --- [         task-1] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-10-27 11:34:33.026  WARN 6612 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-10-27 11:34:33.118  INFO 6612 --- [         task-1] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.4.21.Final
2020-10-27 11:34:33.412  INFO 6612 --- [         task-1] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-10-27 11:34:33.606  INFO 6612 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path &#39;&#39;
2020-10-27 11:34:33.610  INFO 6612 --- [           main] DeferredRepositoryInitializationListener : Triggering deferred initialization of Spring Data repositories…
2020-10-27 11:34:33.611  INFO 6612 --- [           main] DeferredRepositoryInitializationListener : Spring Data repositories initialized!
2020-10-27 11:34:33.627  INFO 6612 --- [           main] b.c.n.i.IndividualProjectApplication     : Started IndividualProjectApplication in 4.645 seconds (JVM running for 5.232)
2020-10-27 11:34:33.670  INFO 6612 --- [         task-1] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect

Then I've commented all others classes and started one-by-one,

this was created:

package br.com.negromonte.individualProject.model;

import java.sql.Date;
import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

@Entity
@Table(name = &quot;client&quot;)
public class Client {
	
	@Id
	@Column(name = &quot;cpf&quot;, unique = true, nullable = false, length = 20)
	private String cpf;
	
	@Column(name = &quot;name&quot;, nullable = false, length = 100)
	private String name;
	
	@Column(name = &quot;email&quot;, nullable = false, length = 100)
	private String email;
	
	@Column(name = &quot;password&quot;,nullable = false, length = 64)
	private String password;

	@Column(name = &quot;phone&quot;,nullable = false, length = 20)
	private String phone;
	
	@Column(name = &quot;birth_day&quot;, nullable = false, columnDefinition = &quot;DATE&quot;)
	private Date birthday;
	
	@Column(nullable = false)
	private boolean fidelity;
	
//	@OneToMany(fetch = FetchType.LAZY, mappedBy = &quot;Client&quot;)
//	private List&lt;Reservation&gt; reservations;
	
	public Client() {
		super();
	}

	public Client(String cpf, String name, String email, String password, String phone, Date birthday,
			boolean fidelity) {
		super();
		this.cpf = cpf;
		this.name = name;
		this.email = email;
		this.password = password;
		this.phone = phone;
		this.birthday = birthday;
		this.fidelity = fidelity;
	}

	public String getCpf() {
		return cpf;
	}

	public void setCpf(String cpf) {
		this.cpf = cpf;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getPhone() {
		return phone;
	}

	public void setPhone(String phone) {
		this.phone = phone;
	}

	public Date getBirthday() {
		return birthday;
	}

	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}

	public boolean isFidelity() {
		return fidelity;
	}

	public void setFidelity(boolean fidelity) {
		this.fidelity = fidelity;
	}

//	public List&lt;Reservation&gt; getReservations() {
//		return reservations;
//	}
//
//	public void setReservations(List&lt;Reservation&gt; reservations) {
//		this.reservations = reservations;
//	}
	
}

then this other too:

package br.com.negromonte.individualProject.model;

import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

@Entity
@Table(name = &quot;hotel&quot;)
public class Hotel {
	
	@Id
	@Column(name = &quot;cnpj&quot;, unique = true, nullable = false, length = 20)
	private String cnpj;
	
	// Length not informed once in the db is set to 255
	@Column(name = &quot;name&quot;, nullable = false)
	private String name;
	
	@Column(name = &quot;email&quot;, nullable = false, length = 100)
	private String email;
	
	@Column(name = &quot;phone&quot;, nullable = false, length = 20)
	private String phone;
	
	@Column(nullable = false)
	private double rating;
	
//	@OneToMany(fetch = FetchType.LAZY, mappedBy = &quot;Hotel&quot;)
//	private List&lt;Reservation&gt; reservations;
//	
//	@OneToMany(fetch = FetchType.LAZY, mappedBy = &quot;Hotel&quot;)
//	private List&lt;Prices&gt; prices;
	
	public Hotel() {
		super();
	}

	public Hotel(String cnpj, String name, String email, String phone, double rating) {
		super();
		this.cnpj = cnpj;
		this.name = name;
		this.email = email;
		this.phone = phone;
		this.rating = rating;
	}

	public String getCnpj() {
		return cnpj;
	}

	public void setCnpj(String cnpj) {
		this.cnpj = cnpj;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getPhone() {
		return phone;
	}

	public void setPhone(String phone) {
		this.phone = phone;
	}

	public double getRating() {
		return rating;
	}

	public void setRating(double rating) {
		this.rating = rating;
	}

//	public List&lt;Reservation&gt; getReservations() {
//		return reservations;
//	}
//
//	public void setReservations(List&lt;Reservation&gt; reservations) {
//		this.reservations = reservations;
//	}
//
//	public List&lt;Prices&gt; getPrices() {
//		return prices;
//	}
//
//	public void setPrices(List&lt;Prices&gt; prices) {
//		this.prices = prices;
//	}
	
	
	
	
}

but this:

package br.com.negromonte.individualProject.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name = &quot;prices&quot;)
public class Prices {
	
	@Column(nullable = false)
	private double weekday;
	
	@Column(nullable = false)
	private double weekend;
	
	@Column(name = &quot;weekday_fidelity&quot;, nullable = false)
	private double weekdayFidelity;
	
	@Column(name = &quot;weekend_fidelity&quot;,nullable = false)
	private double weekendFidelity;
	
//	@ManyToOne(fetch = FetchType.EAGER, optional = false)
//	private Hotel hotels;
	
	public Prices() {
		super();
	}

	public Prices(double weekday, double weekend, double weekdayFidelity, double weekendFidelity) {
		super();
		this.weekday = weekday;
		this.weekend = weekend;
		this.weekdayFidelity = weekdayFidelity;
		this.weekendFidelity = weekendFidelity;
	}

	public double getWeekday() {
		return weekday;
	}

	public void setWeekday(double weekday) {
		this.weekday = weekday;
	}

	public double getWeekend() {
		return weekend;
	}

	public void setWeekend(double weekend) {
		this.weekend = weekend;
	}

	public double getWeekday_fidelity() {
		return weekdayFidelity;
	}

	public void setWeekday_fidelity(double weekdayFidelity) {
		this.weekdayFidelity = weekdayFidelity;
	}

	public double getWeekend_fidelity() {
		return weekendFidelity;
	}

	public void setWeekend_fidelity(double weekendFidelity) {
		this.weekendFidelity = weekendFidelity;
	}

//	public Hotel getHotels() {
//		return hotels;
//	}
//
//	public void setHotels(Hotel hotels) {
//		this.hotels = hotels;
//	}

}

and this:

package br.com.negromonte.individualProject.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import java.sql.Timestamp;

@Entity
@Table(name = &quot;reservation&quot;)
public class Reservation {
	
	@Column(nullable = false, columnDefinition = &quot;DATETIME&quot;)
	private Timestamp checkin;
	
	@Column(nullable = false, columnDefinition = &quot;DATETIME&quot;)
	private Timestamp checkout;
	
	@Column(name = &quot;dailys_weekday&quot;, nullable = false)
	private int dailysWeekday;
	
	@Column(name = &quot;dailys_weekend&quot;, nullable = false)
	private int dailysWeekend;
	
	@Column(name = &quot;total_payed&quot;, nullable = false)
	private double totalPayed;
	
	@Column(name = &quot;was_fidelity&quot;, nullable = false)
	private boolean wasFidelity;
	
//	@ManyToOne(fetch = FetchType.EAGER, optional = false)
//	private Client client;
	
//	@ManyToOne(fetch = FetchType.EAGER, optional = false)
//	private Hotel hotel;
	
	public Reservation() {
		super();
	}

	public Reservation(Timestamp checkin, Timestamp checkout, int dailysWeekday, int dailysWeekend, double totalPayed,
			boolean wasFidelity) {
		super();
		this.checkin = checkin;
		this.checkout = checkout;
		this.dailysWeekday = dailysWeekday;
		this.dailysWeekend = dailysWeekend;
		this.totalPayed = totalPayed;
		this.wasFidelity = wasFidelity;
	}

	public Timestamp getCheckin() {
		return checkin;
	}

	public void setCheckin(Timestamp checkin) {
		this.checkin = checkin;
	}

	public Timestamp getCheckout() {
		return checkout;
	}

	public void setCheckout(Timestamp checkout) {
		this.checkout = checkout;
	}

	public int getDailysWeekday() {
		return dailysWeekday;
	}

	public void setDailysWeekday(int dailysWeekday) {
		this.dailysWeekday = dailysWeekday;
	}

	public int getDailysWeekend() {
		return dailysWeekend;
	}

	public void setDailysWeekend(int dailysWeekend) {
		this.dailysWeekend = dailysWeekend;
	}

	public double getTotalPayed() {
		return totalPayed;
	}

	public void setTotalPayed(double totalPayed) {
		this.totalPayed = totalPayed;
	}

	public boolean isWasFidelity() {
		return wasFidelity;
	}

	public void setWasFidelity(boolean wasFidelity) {
		this.wasFidelity = wasFidelity;
	}

//	public Client getClient() {
//		return client;
//	}
//
//	public void setClient(Client client) {
//		this.client = client;
//	}
//
//	public Hotel getHotel() {
//		return hotel;
//	}
//
//	public void setHotel(Hotel hotel) {
//		this.hotel = hotel;
//	}
}

did not get created.
here the output when creation works:

  .   ____          _            __ _ _
 /\\ / ___&#39;_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | &#39;_ | &#39;_| | &#39;_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  &#39;  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.4.RELEASE)

2020-10-27 11:41:25.213  INFO 8904 --- [           main] b.c.n.i.IndividualProjectApplication     : Starting IndividualProjectApplication on Othon-NoteAMD with PID 8904 (D:\programacao\Qualiti\individualProject\target\classes started by othon in D:\programacao\Qualiti\individualProject)
2020-10-27 11:41:25.217  INFO 8904 --- [           main] b.c.n.i.IndividualProjectApplication     : No active profile set, falling back to default profiles: default
2020-10-27 11:41:26.016  INFO 8904 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2020-10-27 11:41:26.051  INFO 8904 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 20ms. Found 0 JPA repository interfaces.
2020-10-27 11:41:27.272  INFO 8904 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-10-27 11:41:27.290  INFO 8904 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-10-27 11:41:27.291  INFO 8904 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.38]
2020-10-27 11:41:27.422  INFO 8904 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-10-27 11:41:27.423  INFO 8904 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2139 ms
2020-10-27 11:41:27.724  INFO 8904 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService &#39;applicationTaskExecutor&#39;
2020-10-27 11:41:27.746  INFO 8904 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2020-10-27 11:41:28.695  INFO 8904 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2020-10-27 11:41:28.754  INFO 8904 --- [         task-1] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-10-27 11:41:28.780  WARN 8904 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-10-27 11:41:28.857  INFO 8904 --- [         task-1] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.4.21.Final
2020-10-27 11:41:29.135  INFO 8904 --- [         task-1] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-10-27 11:41:29.342  INFO 8904 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path &#39;&#39;
2020-10-27 11:41:29.345  INFO 8904 --- [           main] DeferredRepositoryInitializationListener : Triggering deferred initialization of Spring Data repositories…
2020-10-27 11:41:29.346  INFO 8904 --- [           main] DeferredRepositoryInitializationListener : Spring Data repositories initialized!
2020-10-27 11:41:29.362  INFO 8904 --- [           main] b.c.n.i.IndividualProjectApplication     : Started IndividualProjectApplication in 4.646 seconds (JVM running for 5.185)
2020-10-27 11:41:29.375  INFO 8904 --- [         task-1] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
Hibernate: create table client (cpf varchar(20) not null, birth_day DATE not null, email varchar(100) not null, fidelity bit not null, name varchar(100) not null, password varchar(64) not null, phone varchar(20) not null, primary key (cpf)) engine=InnoDB
Hibernate: create table hotel (cnpj varchar(20) not null, email varchar(100) not null, name varchar(255) not null, phone varchar(20) not null, rating double precision not null, primary key (cnpj)) engine=InnoDB
2020-10-27 11:41:32.030  INFO 8904 --- [         task-1] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-10-27 11:41:32.040  INFO 8904 --- [         task-1] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit &#39;default&#39;

to have success on creation I have to comment Prices.java and Reservation.java which doesn't let any tables to be created when uncommented, is there a problem with my modeling? any wrong annotation?

答案1

得分: 0

你需要将 @Id 注解添加到与已成功创建的表类似的 id 字段上。

根据 JPA 2 规范（2.4 主键和实体标识），该类必须具有唯一的 ID。

英文:

You need to add an @Id annotation to the id field similar to the successfully created tables.

In accordance with the JPA 2 specification (2.4 Primary Keys and Entity Identity), the class must have a unique ID.

huangapple
  • 本文由 发表于 2020年10月27日 22:47:38
  • 转载请务必保留本文链接：https://go.coder-hub.com/64556927.html
  • java
  • spring
  • spring-boot
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