#30151: last() and [] operator give different results
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Reporter: NMO13 | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 1.11
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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I have a model RSSFeed. To get the last element in my DB, I do:
{{{
RSSFeed.objects.last()
# Output: <RSSFeed: www.sooperarticles.com>
}}}
I slice it to get the first 10 element in the query
{{{
first_ten_feeds = RSSFeed.objects.all()[:10]
}}}
Using first and the bracket operator is consistent:
first_ten_feeds.first()
# Output: <RSSFeed: pressetext News>
first_ten_feeds[0]
# Output: <RSSFeed: pressetext News>
But using last and the bracket operator is not consistent:
{{{
first_ten_feeds[9]
# Output: <RSSFeed: FinanzNachrichten.de: Nachrichten zu IT-
Dienstleistungen>
first_ten_feeds.last()
# Output: <RSSFeed: www.sooperarticles.com>
}}}
Why? I expect to get the same result for last() and [] above.
RSSFeed.objects.last() and first_ten_feeds.last()
seem to give the same result but that does not make sense to me.
I already openend a SO question with the same content:
https://stackoverflow.com/questions/54477472/last-and-operator-give-
different-results
There I was suggested to open a bug.
--
Ticket URL: <https://code.djangoproject.com/ticket/30151>
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