Great, thank you! Although I'm more than willing to upgrade, I still wonder if this fix will be backported to 1.7… On 28 Mar 2015 02:15, "Tim Graham" <timogra...@gmail.com> wrote:
> This is fixed in Django 1.8. See the fifth item in > https://docs.djangoproject.com/en/dev/releases/1.8/#models. > > On Friday, March 27, 2015 at 5:38:15 PM UTC-4, Gergely Polonkai wrote: >> >> Hello, >> >> I’d like to execute the following code: >> >> Booking.objects.filter(start_ts__isnull = False, end_ts__isnull = >> False).extra(select = {'amount': "strftime('%s', end_ts) - strftime('%s', >> start_ts)"}) >> >> However, in the shell, I get the following error: >> >> Traceback (most recent call last): File "<console>", line 1, in <module> >> File "/home/polesz/Projects/duckbook/venv/lib/python3.4/ >> site-packages/django/db/models/query.py", line 835, in extra >> clone.query.add_extra(select, select_params, where, params, tables, >> order_by) File "/home/polesz/Projects/duckbook/venv/lib/python3.4/ >> site-packages/django/db/models/sql/query.py", line 1744, in add_extra >> entry_params.append(next(param_iter)) StopIteration >> >> I have tried doubling the percent signs (%%s) and escaping them with a >> backslash (\%s), but neither helped. I also looked at this answer >> <http://stackoverflow.com/a/18143147/1305139>[1], but that solution >> doesn’t work with QuerySet.extra() (or I just miss the point). >> >> What is the correct way to solve this? >> >> I also tried to use select_params like this: >> >> Booking.objects.filter(start_ts__isnull = False, end_ts__isnull = >> False).extra(select = {'amount': "strftime('%s', end_ts) - strftime(%s, >> start_ts)"}, select_params = ['%s', '%s']) >> >> but regardless the usage of quote signs, the resulting query has \'%s\', >> which gives an SQL error, of course. >> >> Best, >> Gergely >> >> [1] http://stackoverflow.com/a/18143147/1305139 >> > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com. > To post to this group, send email to django-users@googlegroups.com. > Visit this group at http://groups.google.com/group/django-users. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/fa509ee1-6bb2-43c8-a1a1-e12ad70a123f%40googlegroups.com > <https://groups.google.com/d/msgid/django-users/fa509ee1-6bb2-43c8-a1a1-e12ad70a123f%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CACczBU%2B8FvXtCHe1bLUYjU51OU8JV4bxEXThQcWMxL5euc44gg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
