Hi everyone,

I've been using NHibernate for 2 weeks now.. and I must say it saves me a hell lot of a time! I just love it !

So far, to represent one-to-many relation, i currently use <bag> in my mapping files and an IList (ArrayList) in my code. So far so good.

But let's say I have a Customer object with an Orders collection

I have to cast it like this:

((Order)Customer.Orders[1]).DateOrdered
I would like to have this instead:

Customer.Orders[1].DateOrdered


Is there an easy way to do this, not using Iesi collection? If not, which class in Iesi collection should I use?

Thanks

If you're using .NET 2.0 try generic collections:

IList <Order> GetOrders(...)

Please correct me, if this isn't the right syntax.

If you're using a previous version I think you have to cast for your class.

I second the last response.

Items in your collection are anonymous when extracting them from teh collection. They must be cast to the correct type in order to access their members.

You could derive a class from ArrayList (or another Collection class) and override the Add and the indexer to only allow Customer objects in and out. That would give you the symantics you are looking for.

Thanks,
Steve Brennan

Thanks, that's exactly what I wanted..

the IList<type> doesn't work yet with Nhibernate!

Thanks to both of you!

Could you rate my post, I am down to 8 points.

You may want to take a look at Ayende's NHibernate.Generics - they certainly solved my strong-typing problems.

http://www.ayende.com/projects/nhiberna ... erics.aspx

Cheers,

Symon.

actually, if you just retrieve the latest version of nH through subversion, you have generics by nh. It's not a fullly tested implementation, but works for me.

Really? Are you building it yourself from SVN? Is it that hard? I remember reading something about ILMerge being used to build NHibernate.

I tried to get the source from SourceForget, but halfway through i get an error.

I tried to get the nightly build, but the CruiseControl server says it failed to build.

--Brian

yeah,.. I'd like to know how to get it from subversion and compile it!

Thanks

no, the ilmerge step was removed.. just get from sourceforge again and compile.. no problems with that.

did that help?

... not that the use of ilmerge prevented NH from building. :)

If you have NAnt, you can build NHibernate like a pro! ;)

What if you don't have Clover installed?

What version of nant are you using? What command are you using to build? I call "nant clean build test" and it doesn't need clover (which I do not have installed) to build successfully.

Cheers, that did the trick. I was running debug.bat.

After a quick look, why is there no PersistentGenericSet class? There seem to be a few ISet<T> implementations floating around...

I created a class that derive from BaseCollection called CategoryCollection.

When I try to retrieve an object which has a property of type CategoryCollection, I get the following:

Object of type 'NHibernate.Collection.Bag' cannot be converted to type 'Com.Progmatik.ClickMax.CategoryCollection'.


The mapping for this uses a Bag as the error Suggest..

Any help ?