spring jpa @ManyToOne不生成外键

当我生成表格时，它会生成它，但JPA不生成任何FK .

当我告诉mysql向我展示它创建表时它做了什么，它显示缺少外键约束 . 它只生成KEY，而不是添加外键 .

mysql> show create table view_display;

| view_display | CREATE TABLE view_display（dtype varchar（31）NOT NULL，id bigint（20）NOT NULL，col int（11）NOT NULL，row int（11）NOT NULL，chart_id bigint（20）DEFAULT NULL，view_id bigint（20）NOT NULL，data_source_id bigint（20）DEFAULT NULL，PRIMARY KEY（id），KEY FKqllm025dtc51xf38qdr5je52q（chart_id），KEY FKb1gu01sld2cm281oa88pjq9ia（view_id），KEY FK2hljr3ohtf3vql7hhvyqbm2mc（data_source_id））ENGINE = MyISAM DEFAULT CHARSET = latin1 |

View.java

@Entity
@Table(name="view")
public class View {
    @Id
    @Column(name = "ID")
    @GeneratedValue(strategy = GenerationType.AUTO, generator = "view_seq")
    @SequenceGenerator(name = "view_seq", sequenceName = "view_seq", allocationSize = 1)
    private Long id;

    private String name;

    @Column(name ="is_default",nullable= false,columnDefinition="tinyint(1) default 0")
    private boolean isDefault;

    @ManyToOne
    @JoinColumn(name="userId",insertable=true, updatable= false,nullable=true)
    private User user;

    @OneToOne
    @JoinColumn(name="cvId",insertable=true, updatable= false,nullable=true,unique=true)
    private CV cv;

    @OneToMany(mappedBy="view")
    private List<ViewDisplay> viewDisplay;
    // getters and setters....
}

ViewDisplay.java

@Entity
@Table(name = "view_display")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
public class ViewDisplay {
    @Id
    @Column(name = "ID")
    @GeneratedValue(strategy = GenerationType.AUTO, generator = "view_display_seq")
    @SequenceGenerator(name = "view_display_seq", sequenceName = "view_display_seq", allocationSize = 1)
    private Long id;

    @ManyToOne
    @JoinColumn(name="chartId",insertable=true, updatable= true, nullable = true)
    private Chart chart;

    @ManyToOne
    @JoinColumn(name = "viewId", insertable = true, updatable = true, nullable=false)
    private View view;

    private int col;

    private int row;

    public ViewDisplay() {}

    public ViewDisplay(Long id, Chart chart, View view, int col, int row) {
        super();
        this.id = id;
        this.chart = chart;
        this.view = view;
        this.col = col;
        this.row = row;
    }
    // getters and setters...



}