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-rw-r--r--docs/ref/validators.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/ref/validators.txt b/docs/ref/validators.txt
index 8323b55909..ecb0daa96f 100644
--- a/docs/ref/validators.txt
+++ b/docs/ref/validators.txt
@@ -188,6 +188,12 @@ to, or in lieu of custom ``field.clean()`` methods.
.. _valid URI schemes: https://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml
+ .. warning::
+
+ Values starting with ``file:///`` will not pass validation even
+ when the ``file`` scheme is provided. Valid values must contain a
+ host.
+
.. attribute:: max_length
.. versionadded:: 3.2.20