相关疑难解决方法(0)

我一直在阅读很多关于@JoinColumn的内容,但我仍然不了解它背后的想法.

病人表

CREATE TABLE patient (
patient_id BIGINT NOT NULL,
first_name VARCHAR(255) NOT NULL,
last_name VARCHAR(255) NOT NULL,
PRIMARY KEY(patient_id));

车辆表

CREATE TABLE vehicles (
patient_id BIGINT NOT NULL,
vehicle_id BIGINT NOT NULL,
vehicle_manufacturer VARCHAR(255),
PRIMARY KEY (vehicle_id),
CONSTRAINT patienthasmanyvehicle FOREIGN KEY(patient_id) REFERENCES patient(patient_id));

患者类

@OneToMany(mappedBy = "patient")
    private Collection<Vehicle> patientVehicles = new ArrayList<Vehicle>();

车辆类

@ManyToOne
@JoinColumn(name="patient_id")
private Patient patient;

我对车辆类如何部分感到困惑,之间的关系是什么

Vehicle Class ---- Entity
@JoinColumn(name="patient_id") ---- annotation
private Patient patient ----field

是吗？该车辆实体有一个外键到患者实体命名patient_id …