On 02/03/2010, at 20.56, Achint Sandhu wrote:
> Hi,
>
> I'm new to scala (2.7.7) and lift (2.0-M2) and as a learning exercise
> have taken on the translation of an existing rails project into a lift
> application.
>
> There are two things I have run into that I'm hoping the more
> experienced members of the list can give me a hand with:
>
> 1) Is there a trait in lift that creates and manages an equivalent of
> the createdAt and updatedAt fields that rails provides? I'm thinking
> something along the lines of IdPK, but have been unable to find
> anything.
>
> 2) I've been following the wiki article on setting up One-to-Many
> relationships (http://wiki.github.com/dpp/liftweb/how-to-work-with-one-
> to-many-relationships) and am running into a difference in behaviour.
> Following the example, if I look at anAuthor.books, I get back a List
> of Book objects, however when I look at aBook.author, I get back a
> Long with the ID of the Author. I would expect aBook.author to return
> an Author object. I've copied and pasted the example in the wiki, to
> make sure that it wasn't my implementation.
>
You should be able to get the object by calling aBook.author.obj - this should
return a Box[Author] so you could get it like this
aBook.author.obj match {
case Full(a) => a // do something with the autor
case Empty => // if the box is empty, handle it somehow
case _ => // should cover everyhting else, Failure etc
}
Hope it helps
> Other than that, so far, it's gone extremely well and I was able to
> get something up and running very quickly which really is a testament
> to the design of the framework.
>
> Thanks.
>
> Cheers,
> Achint
>
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