Question

下面是我的Alert Entity类，我正在自动生成ID。但是在保存时，由于Spring Boot出现错误：实体字段'u_id'没有默认值。我也尝试了Strategy = SEQUENCE / AUTO，结果相同。

import javax.persistence.*;

@Entity
public class Alert {    
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "u_id")
    private long u_id = 1;
    @Embedded
    private Reading reading;

    @Column(insertable = false, updatable = false)
    String vin;

    private String priority;

    public long getU_id() {
        return u_id;
    }

    public void setU_id(long u_id) {
        this.u_id = u_id;
    }

    public String getPriority() {
        return priority;
    }

    public void setPriority(String priority) {
        this.priority = priority;
    }


    public Reading getVehicleReading() {
        return reading;
    }

    public void setVehicleReading(Reading vehicleReading) {
        this.reading = vehicleReading;
        this.vin = vehicleReading.getVin();
    }


}

Answer 1

提供另一个注释，如下所示。

@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(columnDefinition = "serial")

Spring Boot：实体字段''持久化时没有默认值

1 个答案: