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authorMalcolm Tredinnick <malcolm.tredinnick@gmail.com>2008-03-11 05:21:50 +0000
committerMalcolm Tredinnick <malcolm.tredinnick@gmail.com>2008-03-11 05:21:50 +0000
commit619576002d538094dde7293d970bc4698ecdbef5 (patch)
tree6f995d548b3bfc9eb921399ab4ee76958d612f0a /tests
parent62bdb6eae8e62e7390f26daa261f75e5cca3b8e7 (diff)
queyrset-refactor: Added error reporting if somebody tries to order by a multi-valued field.
git-svn-id: http://code.djangoproject.com/svn/django/branches/queryset-refactor@7220 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Diffstat (limited to 'tests')
-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.