Question

我只是在学习spring，而数据库之间的关系却出现了问题，并以错误结束：

“ org.springframework.beans.factory.BeanCreationException：错误在类路径中创建名称为“ entityManagerFactory”的bean 资源 [org / springframework / boot / autoconfigure / orm / jpa / HibernateJpaConfiguration.class]：调用init方法失败；嵌套异常为 org.hibernate.AnnotationException：未知的映射于： Varqina.WebReptile.models.entity.UserEntity.userPropertiesEntity，引用的属性未知： Varqina.WebReptile.models.entity.UserPropertiesEntity.user“

UserProperies:
import lombok.Data;
import javax.persistence.*;
import java.time.LocalDateTime;
@Table(name = "user")
@Data
@Entity
public class UserEntity {
    public enum AccountStatus{
        ACTIVE, PREMIUM, NOT_ACTIVE;
    }
    @Id @GeneratedValue private Integer id;
    private String nickname;
    private String password;
    private @Column(name = "creation_time") LocalDateTime creationTime;
    @Enumerated(EnumType.STRING)
    private AccountStatus status;
    private String email;

    @OneToOne(mappedBy = "user",fetch = FetchType.LAZY,cascade = {})
    private UserPropertiesEntity userPropertiesEntity;

}
UserPropertiesEntity:
import lombok.Data;
import javax.persistence.*;
@Data
@Entity
@Table(name = "user_properties")
public class UserPropertiesEntity {
    private @Id @GeneratedValue Integer id;
    private String city;
    private String nation;
    private @Column(name = "birth_day") String birthDay;
    @OneToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "user_id")
    private UserEntity nickname;

Answer 1

@OneToOne关系中的mappedBy属性必须与目标实体中的属性名称相对应。

因此它应该是“昵称”而不是“用户”

@OneToOne(mappedBy = "nickname",fetch = FetchType.LAZY,cascade = {})
private UserPropertiesEntity userPropertiesEntity;

如何解决“在类路径资源中创建名称为'entityManagerFactory'的bean时出错”

1 个答案: