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-rw-r--r--docs/ref/models/fields.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/ref/models/fields.txt b/docs/ref/models/fields.txt
index d322904ec9..99ba78cb09 100644
--- a/docs/ref/models/fields.txt
+++ b/docs/ref/models/fields.txt
@@ -287,6 +287,9 @@ For example, if you have a field ``title`` that has
``unique_for_date="pub_date"``, then Django wouldn't allow the entry of two
records with the same ``title`` and ``pub_date``.
+Note that if you set this to point to a :class:`DateTimeField`, only the date
+portion of the field will be considered.
+
This is enforced by model validation but not at the database level.
``unique_for_month``