and if a user just refreshes the page? or you use it as a response
page somewhere else? then suddenly everything is empty?
On 3/29/07, Eelco Hillenius <[EMAIL PROTECTED]> wrote:
> > One problem I have due to avoiding DTOs is that most of the time I don't
> > want to serialize my form models, because they are (often big) entities
> with
> > lazy loaded associations. So in principle I would use an
> > LoadableDetachableModel to load the entity from the repository each time
> the
> > model is reattached. But suppose I'm updating a UserProfile. The first
> time
> > it would be ok to populate the model from the persistent profile to be
> > updated. But once the form is submitted there's no point in loading the
> > profile from the repository again because its properties would be
> > overwritten from those coming from the form anyway. So I'm tempted to
> > subclass AbstractDetachableModel so that it loads the profile from the
> > repository upon creation, but instantiates a brand new profile to be
> > populated from the form upon reattachment. Is there a better pattern for
> > this? Anyone has run into the same problem?
>
> Sounds like that could work. Btw, you can still just use
> LoadableDetachableModels. Something like this?
>
> class SomeModel extends LoadableDetachableModel {
>
> protected Object load() {
> return new Foo();
> }
> }
>
> new SomeModel(anotherFooThatWasLoaded);
>
> The thing I want to point out here is that you can just initialize the
> LDM with the object you loaded from the database, for the first
> request, and then implement load like this to get fresh instances on
> next requests.
>
> Eelco
>
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