Multiple versions of a image file

> > Anyway, I'm using Magritte to implement an application and I'd like to
> > automatically generate version of an image file as soon as its upload.
> > My first thought has been to change MAFileModel to support that and
> > propagate the support to its subclasses, and change MAFileDescription
> > to support a new attribute called versions or something like that. Is
> > that a good path, or is there is something already that I should use?
>
> It depends if you want to version files also in other situations. If
> this is the only case then it is certainly simpler just to have
> specific accessors in your model:
>
> MyModel>>imageFile: aFileModel
>      imageFileVersions add: aFileModel
>
> MyModel>>imageFile
>      ^ imageFileVersions isEmpty ifFalse: [ imageFileVersions last ]
>
> Lukas
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
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>

> > Thanks for the quick reply. I guess I didn't express myself well when
> > I used the word "versions". By versions I meant diferent
> > representations, like thumbnails, for example. Currently, I'm
> > generation them on-the-fly, but I'd like to keep then on the disk to
> > make use of Apache static file support.
>
> In this case a new subclass of MAFileModel is probably the easiest way
> to go (I did something similar for a commercial project). You can tell
> the file-description to use a different file-model class using the
> #kind: accessor.
>
>
> Lukas
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
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