Serializer field 'default' argument may be a callable

2 files changed, 4 insertions, 1 deletions

diff --git a/docs/api-guide/fields.md b/docs/api-guide/fields.md
index 9820cb40..c7db32ed 100644
--- a/docs/api-guide/fields.md
+++ b/docs/api-guide/fields.md
@@ -41,7 +41,9 @@ Defaults to `True`.
 
 ### `default`
 
-If set, this gives the default value that will be used for the field if none is supplied.  If not set the default behavior is to not populate the attribute at all.
+If set, this gives the default value that will be used for the field if none is supplied.  If not set the default behavior is to not populate the attribute at all. 
+
+May be set to a function or other callable, in which case the value will be evaluated each time it is used.
 
 ### `validators`
 
diff --git a/docs/topics/release-notes.md b/docs/topics/release-notes.md
index 77cd4f9e..6eb18160 100644
--- a/docs/topics/release-notes.md
+++ b/docs/topics/release-notes.md
@@ -43,6 +43,7 @@ You can determine your currently installed version using `pip freeze`:
 ### Master
 
 * Added `get_url` hook to `HyperlinkedIdentityField`.
+* Serializer field `default` argument may be a callable.
 * Bugfix: The `lookup_field` option on `HyperlinkedIdentityField` should apply by default to the url field on the serializer.
 * Bugfix: `HyperlinkedIdentityField` should continue to support `pk_url_kwarg`, `slug_url_kwarg`, `slug_field`, in a pending deprecation state.
 * Bugfix: Ensure we always return 404 instead of 500 if a lookup field cannot be converted to the correct lookup type.  (Eg non-numeric `AutoInteger` pk lookup)