如何在Spring Boot JPA中获取OneToMany中的子级的空值

@Entity
public class Parent {
    @Id
    private Long id;
    
    @OneToMany(mappedBy = "parent", cascade = CascadeType.ALL)
    private List<Child> children;
    
    // 其他属性和方法...
}

@Entity
public class Child {
    @Id
    private Long id;
    
    @ManyToOne
    private Parent parent;
    
    // 其他属性和方法...
}

public List<Child> getNullChildren() {
    return children.stream().filter(child -> child.getProperty() == null).collect(Collectors.toList());
}