列问题上唯一的休眠连接表

Question

我对休眠有问题，因为他创建了连接表（我不知道如果能告诉我在哪里以及为什么会很好），最糟糕的是他在列上使用唯一性，我不能添加超过一个用户相同的角色。

整个项目：https://github.com/dextep/sms/tree/master/src/main/java/pl/popiel/sms

Database look

用户类

package pl.popiel.sms.model.user;

import org.hibernate.validator.constraints.UniqueElements;

import javax.persistence.*;
import javax.validation.constraints.Email;
import java.util.Set;

@Entity
@Table(name="sms_users")
@SequenceGenerator(name = "sms_users_seq", sequenceName = "sms_users_seq", allocationSize = 1)
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sms_users_seq")
    private long id;

    @Email
    private String email;

    private String password;

    private String firstName;

    private String lastName;

    @Column(name="mobile_nr")
    private String mobileNumber;


    @ElementCollection(targetClass=Role.class)
    private Set<Role> roles;

    public String getFullName() {
        return firstName != null ? firstName.concat(" ").concat(lastName) : "";
    }

    public User() {
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    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 getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getMobileNumber() {
        return mobileNumber;
    }

    public void setMobileNumber(String mobileNumber) {
        this.mobileNumber = mobileNumber;
    }

    public Set<Role> getRoles() {
        return roles;
    }

    public void setRoles(Set<Role> roles) {
        this.roles = roles;
    }
}

角色.class

package pl.popiel.sms.model.user;

import org.hibernate.validator.constraints.UniqueElements;
import org.springframework.stereotype.Indexed;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="sms_roles")
@SequenceGenerator(name = "sms_roles_seq", sequenceName = "sms_roles_seq", allocationSize = 1)
public class Role {

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sms_roles_seq")
    private long id;

    private String role;

    public Role() {
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getRole() {
        return role;
    }

    public void setRole(String role) {
        this.role = role;
    }
}

Answer 1

我没有注意到我错过了 User 类中“角色”处的 @ManyToMany 注释。

解决：

@ManyToMany
private Set<Role> roles;