Thanks. Types are still largely a mystery to me, but this works just fine.
Chas.
Derek Chen-Becker wrote:
> Because it's type erasure I don't think I can do a generic "new" inside
> the methods, but the findOne method does return a Can. That means that
> you were actually pretty close in your
If you wrap your JPA stuff in a trait like:
trait Builder[T] {
def create: T
}
Thus, you've got a type-safe create method... you'd use it like:
object UserSingleton extends Builder[User] {
def create = new User
def user: User = Model.createNamedQuery[User]().findOne openOr create
}
O
Because it's type erasure I don't think I can do a generic "new" inside the
methods, but the findOne method does return a Can. That means that you were
actually pretty close in your demo code. Here's what it could look like:
val user: User =
Model.createNamedQuery[User](
"findUserByUsername"
That will probably work. I was thinking it would be nice to build in a
method findOrNew that would do it for me... but it looks like that might
involve some sort of implicit manifest thingy, so I don't know.
Chas.
Viktor Klang wrote:
>
>
> On Mon, Dec 1, 2008 at 7:12 AM, Charles F. Munat <[E
On Mon, Dec 1, 2008 at 7:12 AM, Charles F. Munat <[EMAIL PROTECTED]> wrote:
>
> Is there a simple way in JPA/Lift to query to retrieve a single object
> from the database, assign it to a val if found, or create a new object
> of that type and assign it instead of there is no such object in the
> d
