From ff01ae3571298b9da67f9b9583f0cb264676ed2b Mon Sep 17 00:00:00 2001
From: Tom Christie
Date: Sat, 8 Dec 2012 13:01:03 +0000
Subject: Version 2.1.8

---
 docs/api-guide/fields.md | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'docs/api-guide')

diff --git a/docs/api-guide/fields.md b/docs/api-guide/fields.md
index 1d4c34cb..50a09701 100644
--- a/docs/api-guide/fields.md
+++ b/docs/api-guide/fields.md
@@ -293,6 +293,7 @@ By default these fields are read-write, although you can change this behaviour u
 **Arguments**:
 
 * `queryset` - By default `ModelSerializer` classes will use the default queryset for the relationship.  `Serializer` classes must either set a queryset explicitly, or set `read_only=True`.
+* `null` - If set to `True`, the field will accept values of `None` or the emptystring for nullable relationships.
 
 ## SlugRelatedField / ManySlugRelatedField
 
@@ -304,6 +305,7 @@ By default these fields read-write, although you can change this behaviour using
 
 * `slug_field` - The field on the target that should be used to represent it.  This should be a field that uniquely identifies any given instance.  For example, `username`.
 * `queryset` - By default `ModelSerializer` classes will use the default queryset for the relationship.  `Serializer` classes must either set a queryset explicitly, or set `read_only=True`.
+* `null` - If set to `True`, the field will accept values of `None` or the emptystring for nullable relationships.
 
 ## HyperlinkedRelatedField / ManyHyperlinkedRelatedField
 
@@ -319,6 +321,7 @@ By default, `HyperlinkedRelatedField` is read-write, although you can change thi
 * `slug_field` - The field on the target that should be used for the lookup. Default is `'slug'`.
 * `pk_url_kwarg` - The named url parameter for the pk field lookup. Default is `pk`.
 * `slug_url_kwarg` - The named url parameter for the slug field lookup. Default is to use the same value as given for `slug_field`.
+* `null` - If set to `True`, the field will accept values of `None` or the emptystring for nullable relationships.
 
 ## HyperLinkedIdentityField
 
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