On Sun, May 16, 2010 at 4:58 AM, Jori <jtla...@gmail.com> wrote:
> Hi,
>
> I have a problem when using MIT in my models. I created two new
> classes which inherit model Entry:
>
> class Entry(models.Model):
> LANGUAGE_CHOICES = settings.LANGUAGES
>
> language = models.CharField(max_length=2,
> verbose_name=_('Comment language'), choices=LANGUAGE_CHOICES)
> user = models.ForeignKey(User)
> country = models.ForeignKey(Country, null=True, blank=True)
>
> created = models.DateTimeField(auto_now=True)
>
> class Comment(Entry):
> comment = models.CharField(max_length=2000, blank=True,
> verbose_name=_('Comment in English'))
> [remainder snipped]
The problem seems to be that you have named a field in your Comment model
with the same name, only lower case. Comment inherits from Entry, using
multi-table-inheritance. This adds a OneToOneField in Comment back to Entry,
which has a side-effect of adding a 'comment' attribute to Entry. This is
the attribute that lets you access the Comment associated with the Entry as
a result of the OneToOneField in Comment, and by default it is given the
name of the related model, all-lowercase.
The problem then occurs when the Comment model "inherits' all the
fields/attributes of Entry: the inherited 'comment' attribute from Entry is
apparently over-riding the specified comment field. That's probably a bug,
but it appears to have been there since 1.0. I have not done any research to
see if it's been reported.
As a workaround you can name your fields something other than the model name
all lowercased, or you can explicitly specify the OneToOneField in the child
models, specifying parent_link=True and something other than the model name
all lowercased for related_name.
Karen
--
http://tracey.org/kmt/
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