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authorIván Camilo Triviño López <25367296+IvanTrivino@users.noreply.github.com>2022-08-29 23:03:53 -0500
committerGitHub <noreply@github.com>2022-08-30 06:03:53 +0200
commit411a6ec93a9b21e5ed1e9fc05b34f021288cd10c (patch)
tree253a3ebb203ef5ea53d32f643966654abf8eed21 /docs
parent0010721e892b470e90878f6128b490f52ebac8c4 (diff)
Fixed #33958 -- Added imports to examples in "Expressions can reference transforms" section.
Diffstat (limited to 'docs')
-rw-r--r--docs/topics/db/queries.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/topics/db/queries.txt b/docs/topics/db/queries.txt
index d256545453..6deeec5037 100644
--- a/docs/topics/db/queries.txt
+++ b/docs/topics/db/queries.txt
@@ -701,15 +701,18 @@ Django supports using transforms in expressions.
For example, to find all ``Entry`` objects published in the same year as they
were last modified::
+ >>> from django.db.models import F
>>> Entry.objects.filter(pub_date__year=F('mod_date__year'))
To find the earliest year an entry was published, we can issue the query::
+ >>> from django.db.models import Min
>>> Entry.objects.aggregate(first_published_year=Min('pub_date__year'))
This example finds the value of the highest rated entry and the total number
of comments on all entries for each year::
+ >>> from django.db.models import OuterRef, Subquery, Sum
>>> Entry.objects.values('pub_date__year').annotate(
... top_rating=Subquery(
... Entry.objects.filter(