On Tue, 2007-03-27 at 19:11 -0700, Alex Dong wrote:
> Hi Folks,
>
> I'm wondering are there any "parse_FOO_display" method for the django
> models?
>
> For example: {{{
> class Transaction(models.Model):
> STATUS = (
> (1, 'Canceled_Reversal'),
> (2, 'Completed'),
> (3, 'Pending'),
> (4, 'Refunded'),
> (5, 'Reversed'),
> (6, 'Processed'))
> status = models.PositiveSmallIntegerField(choices=STATUS)
> }}}
>
> I know that I could call "tx.get_status_display()" to get descriptive
> name for the status, say "Completed". But how can I get `2` when given
> the descriptive name `Completed`?
There's no standard method to do that. It doesn't seem to be a very
common requirement. You could write one yourself if you wanted to:
def get_less_readable_version(self, choice):
choices = self._meta.get_field('status').choices
for val, name in choices:
if name == choice:
return val
Obviously a few variations on this theme are possible, such as putting
the choices in a dictionary once and then doing a lookup. The only
slightly tricky thing here is the _meta.get_field(...).choices call to
get the choices list for a particular field.
Regards,
Malcolm
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