java hibernate entity: allow to set related object both by id and object itself

Question

I\'ve got a following Java class which is also a Hibernate entity:

@Entity
@Table(name = \"category\")
public class Category {

    @ManyToOne
    @JoinColumn(na         


        

Answer 1

You can define lazy init

@ManyToOne(fetch=FetchType.LAZY)

guess the column is nullable so it's not a problem to save the Category without parent (root)