Save can be used in assignment

docs/changelog.rst

@@ -4,6 +4,7 @@ Changelog
 
 Changes in 0.6.X
 ================
+- Added assignment to save, can now do: b = MyDoc(**kwargs).save()
 - Added support for pull operations on nested EmbeddedDocuments
 - Added support for choices with GenericReferenceFields
 - Added support for choices with GenericEmbeddedDocumentFields

mongoengine/document.py

@@ -233,6 +233,7 @@ class Document(BaseDocument):
         self._changed_fields = []
         self._created = False
         signals.post_save.send(self.__class__, document=self, created=created)
+        return self
 
     def cascade_save(self, *args, **kwargs):
         """Recursively saves any references / generic references on an object"""