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-rw-r--r--docs/ref/databases.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/ref/databases.txt b/docs/ref/databases.txt
index 7055834318..ca82f4273f 100644
--- a/docs/ref/databases.txt
+++ b/docs/ref/databases.txt
@@ -374,6 +374,13 @@ because it is more accurate.
.. _MySQL Unicode Character Sets: http://dev.mysql.com/doc/refman/5.7/en/charset-unicode-sets.html
+.. warning::
+
+ Model formsets validate unique fields in a case-sensitive manner. Thus when
+ using a case-insensitive collation, a formset with unique field values that
+ differ only by case will pass validation, but upon calling ``save()``, an
+ ``IntegrityError`` will be raised.
+
Connecting to the database
--------------------------