yeah and I'd expect the ViewModel data arrow to be covered with binding

@User uploaded a file: Untitled

I am reading in a CSV file and creating records before loading in a database. I am checking for empty Strings and not setting them if they are empty...

This works fine, I was just wondering if there is a "better" way to do it in Kotlin..

Indeed

@jchildress

isNotEmpty

? 🙂

@edvin Thank you. That works. Used isNotBlank()

@edvin in the diagram i attached, how would you let the ViewModel know of Model change events?

@carlw It is done automatically, whenever a change is made in the model it is pushed to the viewmodel facade property.

@User uploaded a file: Untitled

PersonModel is a ViewModel subclass, right?

Yes

When the model receives new records, say api.get("persons").list().toModel(), does the model hold a reference to the ViewModel?

I'm not sure I understand. In the example above, the ViewModel holds a specific person. The properties of the ViewModel will only be updated when the properties of that specific person is updated, until it is exchanged for another person:

model.rebind { item = someOtherPerson }

Or in the case of a ItemViewModel, simply

model.item = someOtherPerson

.

(Since it does the rebind automatically in that case)

can another view initiate a model update? like a call to api.get("person").toModel()

Another view can initiate the model update for sure. I don't quite understand what you mean by the

api.get("person").toModel()

example though - this will create a new person object, and that would have to be set into the ViewModel.

Are you talking about updating that same person with fresh info from a remoting call?

yes...or list of persons. 2 Views. 2 ViewModels. Both looking at similar (not identical) data. One calls for a refresh.

@thomasnield When you get online...if you see something in the FXDocs project that could be ported over to the TornadoFX documentation, let me know. I have all the asciidoc code here https://fxdocs.github.io/docs/

If you have an instance of a person, and that instance is backed by one or more viewmodels, you can update that person object like this:

person.updateModel(get("persons/42").one())

Sorry for beeing dense here, maybe a concrete code example would be better 🙂

yeah i owe you that. I haven't gotten into the model layer with TornadoFX.

I'm generally dense when it comes to understanding stuff like that, but code I can always reason with..hehe

it looks like in the Microsoft stuff I posted, they send a ViewModel callback into the Model to allow for async operations

How did this channel stay silent all day? Is everybody alive?

i'm here. i'm in that spot where a bad bug starts collecting new requirements

kind of like a scorpion in the SW