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Re: saving a one-to-many

by Corey-24 :: Rate this Message:

On Saturday 10 March 2007 03:46:03 pm Fred Janon wrote:
> I wonder why your controller is named ServiceOrder.groovy and not
> ServiceOrderController.groovy?
>

My bad! Was a typo, ServiceOrderController.groovy is correct.

>
> Then
> class ServiceOrder {
>
> static hasMany = [ items : OrderLine ]
>
> ===> missing
> Set items = new HashSet()
>
> Then in the controller just creating and adding an OrderLine to items will
> trigger the automatic save of both by Hibernate after the controller action
> retuns
>

That's perfect! In fact I saw that referenced somewhat cryptically in the
docs ( http://grails.codehaus.org/GORM+-+Defining+relationships ), but was
unable to figure out exactly how it was relevant:

"
If you want, you can define the property like this: "Set books = new
HashSet()"
"

Thanks so much for responding, very much appreciated!

Beers,

Corey

> Fred
>
> On 3/10/07, Corey <corey_s@...> wrote:
> > I feel like I'm doing this in more of an idiotic, rather than idiomatic
> > fashion.
> >
> > I have something called a ServiceOrder, which can contain many line
> > items, for which I've created an OrderLine. Each OrderLine associates one
> > or more Products with any particular ServiceOrder.
> >
> > I'm wondering how to save a ServiceOrder ( one-to-many ) in the most
> > succinct
> > way possible. Do I save the ServiceOrder first, then simply begin adding
> > OrderLines, as I do below - or is there a more direct/elegant/fashionable
> > way
> > of doing this?
> >
> >
> > .../domain/ServiceOrder.groovy:
> >
> > ServiceOrder.groovy
> > static constraints = {
> > contact( nullable : false )
> > creditCard( nullable : false )
> > }
> >
> > Contact contact
> > CreditCard creditCard
> >
> > }
> >
> > .../domain/OrderLine.groovy:
> >
> > class OrderLine {
> >
> > static belongsTo = ServiceOrder
> >
> > /* are the following constraints desired/valid?
> > static constraints = {
> > serviceOrder( nullable : false )
> > product( nullable : false )
> > }
> > */
> >
> > Integer quantity = 1
> >
> > ServiceOrder serviceOrder
> > Product product
> >
> > }
> >
> >
> > .../controllers/ServiceOrder.groovy:
> >
> > // am I doing this "correctly"?
> > private save = {
> >
> > def serviceOrder = new ServiceOrder(
> > contact : new Contact( params ),
> > creditCard : new CreditCard( params )
> > )
> > serviceOrder.save()
> >
> > // there should be a loop here, but I'm simplifying for
> > // sake of brevity
> > serviceOrder.addOrderLine(
> > new OrderLine(
> > serviceOrder : serviceOrder,
> > product : Product.get( params.productId )
> > )
> > )
> > serviceOrder.save()
> >
> > [ serviceOrder : serviceOrder ]
> >
> > }
> >
> >
> >
> >
> > ---------------------------------------------------------------------
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