Merge remote-tracking branch 'upstream/master'

1 files changed, 6 insertions, 1 deletions

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 398d473f..ca421ace 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -357,7 +357,12 @@ class RelatedField(WritableField):
         if self.read_only:
             return
 
-        value = data.get(field_name)
+        try:
+            value = data[field_name]
+        except KeyError:
+            if self.required:
+                raise ValidationError(self.error_messages['required'])
+            return
 
         if value in (None, '') and not self.null:
             raise ValidationError('Value may not be null')