Hibernate foreign key without reference to foreign key Entity

Question

I use Hibernate 4.2. I have two tables say Employee and Employer. I have employer_id in employee table as foreign key.

Now in Employee.java file can I have

@Column(name="employer_id") 
private Integer employerId;

I don't want to have a Employer reference in Employee as I don't want to fetch Employer data every time I fetch employee.

Also please let me know is there a way I can have Employer reference and make Hibernate not to fetch it unless an request is made say getEmployer();

Ean V · Accepted Answer · 2013-09-12 05:13:51Z

4

You can do it using lazy loading put following annotation:

private Employer employer;
.
.
.

@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="employer_id")
public Employer getEmployer() {
   return this.employer;
}

And employer will be loaded only when you call getEmployer()

edited Sep 12, 2013 at 5:13

answered Sep 12, 2013 at 0:47

Ean V

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3 Comments

Aditya Over a year ago

Hi...I have other fields in Employee as well....And is being frequently fetched from database. In lazy whenever it also fetches the information form employer when I fetch some other employee. The employer_id in my case is not much used and being used in only very few scenarios. Hence I think to use lazy will also won't serve mine actual purpose of not having to fetch employer data from db.

Ean V Over a year ago

I didn't get exactly what you meant! This won't fetch data unless you call the getter method. If you call getter you need it though!

Aditya Over a year ago

Thanks for response. Just a doubt...It won't fetch employer details, if I fetch some other details from employee say employee.getDepartmentDetails();

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