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How to add one element to collection without loading?

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avihaimar77

Post subject: How to add one element to collection without loading?

Posted: Thu Jun 28, 2007 4:16 pm

Regular

Joined: Wed May 02, 2007 2:42 pm
Posts: 101

Hey,

Lets say i have - Department
Department has a List of Emploee (@OneToMany).

I want to add one emploee to the list withot loading the whole collection.

department.getEmployee().add(emploee)
will load the collection and it is bad if i have a big collection.

Thank you

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timfulmer

Post subject:

Posted: Thu Jun 28, 2007 7:00 pm

Newbie

Joined: Thu Nov 09, 2006 9:42 pm
Posts: 13

Try something like this:

Code:

List<Employee> employees= new ArrayList<Employee>();
employees.add( employee);
department.setEmployee( employees);
entityManager.merge( department);

--
Tim

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avihaimar77

Post subject: The use case that i am talking about is adding elment

Posted: Thu Jun 28, 2007 8:54 pm

Regular

Joined: Wed May 02, 2007 2:42 pm
Posts: 101

to already persistenced large collection.

you already have Department which has reference to list of employee

so you need :

Quote:

Deprtment dep = em.find(Department.class,ID);
dep.getEployeeList.add(Employee);

This will load the complete list.

Also i want to avoid bi-directional if i dont have to.

Thank you

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