Question

I have parent and child entries in same table, For differentiate i have added one column which have parent id.

description of table as below

create table temp(id bigint(20) PK,name varchar(50),parent_id bigint(20) references temp(id));

for Ex..

id | name    | parent_id 
------------------------
1  | text1   | null 
2  | text1.1 | 1
3  | text1.2 | 1 

How do i maintain this table with hibernate save / saveOrUpdate ?

When i m going to save records in this table it has ID as auto generated so at the time of save i would get parent_id = 0 instead of actual ID.

Please give some needful Answers..

Answer 1

You can use hibernate annotation here Supose i have two entity Question and Answer.

Question have :
    questionid
    name

Answer have :
    answerid
    questionid
    name 

Answer Entity contain :

   @ManyToOne(cascade=CascadeType.ALL)
    @JoinColumn(name="questionid")
    private Question question;

Question Entiry contain :
    @OneToMany(cascade=CascadeType.ALL,fetch=FetchType.LAZY,mappedBy="question")
    private List<Answer> anserList = new ArrayList<Answer>();

Now you can set Answer before actually creating question like :

for(Answer  opt : question.getAnswerList()){
                    opt.setQuestion(question);

                }