Python-сообщество

class MyModel(models.Model):
    class Meta:
        unique_together = [('my_field', 'user_id'), ]

class MyModel(models.Model):
    user_id = models.ForeignKey(User)
    my_field = models.SomeStandartField()
    class Meta:
        unique_together = [('my_field', 'user_id'), ]

Exception Type: 	IntegrityError
Exception Value: 	columns owner_id, link are not unique

class BookMark(models.Model):
    category = models.ForeignKey(BookMarkCategory, verbose_name=_('Category'))
    owner = models.ForeignKey(User, verbose_name=_('Owner'))
    description = models.TextField(_('Description'), blank=True)
    link = models.CharField(_('Link'), max_length=150)
    priority = models.IntegerField(_('Priority'))
    looked_through = models.BooleanField(_('Looked trough'))
    publick = models.BooleanField(_('Public'))
    class Meta:
        unique_together = ('owner', 'link')

def create_bookmark(request):
    if request.POST:
        form = BookMarkForm(request.POST)
        if form.is_valid():
            bookmark = form.save(commit=False)
            bookmark.owner = request.user
            bookmark.save()
            return redirect('show_bookmarks_list')
    else:
        form = BookMarkForm()
    return render(request, 'mybookmark/create_bookmark.html', dict(form=form))