Add support for partial serializer updates

1 files changed, 2 insertions, 2 deletions

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 01cf5ae3..d35e918c 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -148,7 +148,7 @@ class WritableField(Field):
         self.widget = widget
 
     def validate(self, value):
-        if value in validators.EMPTY_VALUES and self.required:
+        if value in validators.EMPTY_VALUES and self.required and not self.root.partial:
             raise ValidationError(self.error_messages['required'])
 
     def run_validators(self, value):
@@ -186,7 +186,7 @@ class WritableField(Field):
             if self.default is not None:
                 native = self.default
             else:
-                if self.required:
+                if self.required and not self.root.partial:
                     raise ValidationError(self.error_messages['required'])
                 return