You could add a field to store the calculated size, and override the
model's save method to perform the necessary calculation. Something
like:
def save(self, force_insert=False, force_update=False):
self.size_formatted = self.width * self.height // or whatever your
calculation actually is
super(ModelName, self).save(force_insert, force_update)
Be sure to replace 'ModelName' with the name of your model.
On Dec 8, 7:18 am, philomat <samuel.luesc...@gmail.com> wrote:
> Hi,
>
> I keep numeric fields like "size", "width", "height" in my database.
> In the admin, I want to render them in a friendly format and attach
> units like "KiB" or "pixels" to them when showing them in the change
> list. I know this could easily be achieved by adding callables such as
> "size_formatted" etc to list_display. However, these are no longer
> sortable.
>
> Is there a way around this limitation?
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