On Jan 13, 12:17 pm, Nicolas Steinmetz <nsteinm...@gmail.com> wrote:
> Hello,
>
> The following view works well with SQLite but since I switched to
> PostgreSQL 8.3, I have the following error :
>
> ValueError at /start/
> The view start.views.index didn't return an HttpResponse object.
>
> Views is :
>
> def index(request):
> """
> Try to see if there is a default theme to display. For the matching
> case, get all category for the given theme and for each category,
> display
> related bookmarks
> """
> default_theme=Theme.objects.filter(is_default=True)
> if default_theme.count() is 1:
> theme=Theme.objects.get(is_default=True)
> return HttpResponseRedirect('%s' % theme.slug)
>
> Model is :
>
> class Theme(models.Model):
> """
> A theme is a general point of view - within theme there would be
> category
> and within category, there will be bookmarks
> """
> name = models.CharField(max_length=50)
> slug = models.SlugField()
> order = models.IntegerField()
> is_default = models.BooleanField(default=False)
>
> class Meta:
> ordering = ['order']
> verbose_name, verbose_name_plural = "Theme", "Themes"
>
> def __unicode__(self):
> return self.name
>
> I do not understand wht it fails or why it is dependant on the SGBD.
> Through the shell, the theme.slug is correct but I noticed that count()
> answers me 1L for PGSQL and just 1 for SQLite - could it explain my issue ?
>
> Regards,
> Nicolas
You're problem is you are testing identity with `is` when you want to
test equality, which you should do with ==, this is likely causing the
condition expect to pass to fail, and therefore your function returns
None, which plainly isn't an HttpResponse object.
Alex
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