JPA OneToOne单向映射

Question

我有2个实体：Field和ViewOptions

省略与问题无关的字段和方法

CREATE TABLE FIELD (
  ID                   INT          NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (ID),
);

CREATE TABLE VIEW_OPTIONS (
  ID                INT         NOT NULL AUTO_INCREMENT,
  FIELD_ID INT         NOT NULL,  
  PRIMARY KEY (ID),
  INDEX (FIELD_ID ASC),
  CONSTRAINT
  FOREIGN KEY (FIELD_ID)
  REFERENCES FIELD (ID)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);

@Table(name = "FIELD")
@Entity
public class Field {
    @OneToOne(mappedBy ="field")
     ViewOptions viewOptions;

@Table(name = "VIEW_OPTIONS")
@Entity
public class ViewOptions  {
    @OneToOne
    @JoinColumn(name = "FIELD_ID")
    Field field;

 @OneToOne
 @JoinColumn(name = "FIELD_ID")
 ViewOptions viewOptions;

Answer 1

不，不是这样的。如果您希望FIELD对象是关系的所有者，那么FIELD表必须有一列用于VIEW_OPTIONS ID。