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-rw-r--r--tests/regressiontests/queries/models.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/tests/regressiontests/queries/models.py b/tests/regressiontests/queries/models.py
index ff55550d4e..17476217cd 100644
--- a/tests/regressiontests/queries/models.py
+++ b/tests/regressiontests/queries/models.py
@@ -418,6 +418,13 @@ FieldError: Infinite loop caused by ordering.
>>> Ranking.objects.all().order_by('rank')
[<Ranking: 1: a3>, <Ranking: 2: a2>, <Ranking: 3: a1>]
+# Ordering by a many-valued attribute (e.g. a many-to-many or reverse
+# ForeignKey) doesn't make sense (there's no natural ordering).
+>>> Item.objects.all().order_by('tags')
+Traceback (most recent call last):
+...
+FieldError: Cannot order by many-valued field: 'tags'
+
# If we replace the default ordering, Django adjusts the required tables
# automatically. Item normally requires a join with Note to do the default
# ordering, but that isn't needed here.