OneToMany集合不删除实体

Question

所以我已经搞砸了一段时间，我似乎无法让它发挥作用。

因此，向集合中添加项目可以正常工作。但删除似乎根本不起作用。我的映射有什么问题？

父元素非常简单。子元素的主键由父ID和客户ID组成。在父协会中，客户只能添加一次。

非常感谢您提供的任何帮助。

代码：

@Entity
@Table(name = "PARENT_TABLE")
public class Parent {
    private Integer parentId;
    private List<Child> children;

    @Id
    @Column(name="PARENT_ID")
    public Integer getParentId() {
        return parentId;
    }

    public void setParentId(Integer parentId) {
        this.parentId = parentId;
    }

    @OneToMany(cascade=CascadeType.ALL, mappedBy="parent",orphanRemoval=true)
    public List<Child> getChildren() {
        return children;
    }

    public void setChildren(List<Child> children) {
        this.children = children;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Parent)) return false;
        Parentt that = (Parent) o;
        return Objects.equals(getParentId(), that.getParentId());
    }

    @Override
    public int hashCode() {
        return Objects.hash(getParentId());
    }
}


@Entity
@Table(name = "CHILD_TABLE")
public class Child {
    private Parent parent;
    private Customer customer;

    @Id
    @ManyToOne
    @JoinColumn(name="PARENT_ID")
    public Parent getParent() {
        return parent;
    }

    public void setParent(Parent parent) {
        this.parent parent;
    }

    @Id
    @ManyToOne
    @JoinColumn(name="CUSTOMER_ID")
    public Customer getCustomer() {
        return customer;
    }

    public void setCustomer(Customer customer) {
        this.customer = customer;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Child)) return false;
        Child that = (Child) o;
        return Objects.equals(getParent(), that.getParent()) &&
                Objects.equals(getCustomer(), that.getCustomer());
    }

    @Override
    public int hashCode() {
        return Objects.hash(getParent(), getCustomer());
    }
}


@Entity
@Table(name = "CUSTOMER_TABLE")
public class Customer{
    private Integer customerId;

    @Id
   @Column(name="CUSTOMER_ID")
    public Integer getCustomerId() {
        return customerId;
    }

    public void setCustomerId(Integer customerId) {
        this.customerId = customerId;
    }
}