Linking Session Model with query model

Question

Hi All,
How do we implement a basic Session Model? Can we use a Session Model similar to Query Model and bind all the columns/attributes with that of ViewBean's ? Does Studio support that. We have a requirement wherein we need to manipulate the fields in the session across page request and then update the database from session. Is there any way to transfer values from Session Model to Query Model at runtime? Please throw some light on this topic.
Thanks
Allam

Answer 1

All models work the same when it comes to binding to display fields of ViewBeans and TiledViews.
A SessionModel does operate a little different though. The fields of a SessionModel are just "passthrough vehicles". In other words, when value is set on a display field that is bound to a SessionModel field, that value is not stored in the model, like a QueryModel, rather the value is written directly to the HTTPSession attribute immediately. There is not need to "execute" the model to make it update it's backend datastore, like a QueryModel with a DB.
As for transferring values from SessionModel to a QueryModel, you would have to do that manually, but I think you are missing the point of the SessionModel. It was meant as a means to bind a view's display fields to the HTTPSession and not much more. If you want to use a QueryModel over several page requests and update it at the end you can just "session" the QueryModel.
The QueryModel (and other executable models) have an API that declares them to be stored in session at the end of the request, and retreived from session when you get the model.
See the javadocs for
getModel(<Model>, <String>, <boolean>, <boolean>)
and then let me know if you have further questions.
craig