Ticket #16168: 16168.diff

docs/topics/forms/modelforms.txt

@@ -435 +435 @@
             class Meta:
                 model = Article
 
+    Furthermore, you have to make sure that the contents of the form field can
+    be used to set the contents of the corresponding model field. When they are
+    not compatible, you will get a ValueError as no implicit conversion takes
+    place.
+
     See the :doc:`form field documentation </ref/forms/fields>` for more information
     on fields and their arguments.