Question

我正在尝试使用Spring和Postgres创建一个应用程序。目前，我有3个实体：User，Role和UserRole。

用户

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;

import javax.persistence.*;

@Data
@Entity
@Builder
@AllArgsConstructor
public class User {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name = "user_id", nullable = false)
    private Long id;
    @Column(name = "username", nullable = false, unique = true)
    private String username;
    @Column(name = "password", nullable = false)
    private String password;
    @Column(name = "name", nullable = false)
    private String firstName;
    @Column(name = "lastName", nullable = true)
    private String lastName;
    @Column(name = "gender", nullable = false)
    private char gender;
    @Column(name = "email", nullable = true)
    private String email;


    public User() {}

    public User(String username, String password, String firstName, String lastName, char gender, String email) {
        this.username = username;
        this.password = password;
        this.firstName = firstName;
        this.lastName = lastName;
        this.gender = gender;
        this.email = email;
    }

}

角色

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;

import javax.persistence.*;

@Data
@Entity
@Builder
@AllArgsConstructor
public class Role {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name = "role_id", nullable = false)
    private Long id;
    @Column(name = "name", nullable = false)
    private String name;
    @Column(name = "description", nullable = false)
    private String description;

    public Role () {}

    public Role (String name, String description) {
        this.name = name;
        this.description = description;
    }

}

的UserRole

import lombok.AllArgsConstructor;
import lombok.Data;

import javax.persistence.*;

@Data
@Entity
@AllArgsConstructor
public class UserRole {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name = "user_role_id")
    private Long id;
    @OneToOne
    @JoinColumn(name = "user_id")
    private User user;
    @OneToOne
    @JoinColumn(name = "role_id")
    private Role role;

    public UserRole () {}

    public UserRole (User user, Role role) {
        this.user = user;
        this.role = role;
    }
}

运行应用程序时，会在数据库中正确创建Role和UserRole表，但{table}}表不是这种情况。我将非常感谢你的帮助:)。

Answer 1

user是postgresql中的保留关键字，因为它不允许使用此名称创建表。尝试使用其他名称。

使用Spring Boot和Postgres创建表时出错

1 个答案: