bugfix for magic_pk is None

gm_serializer/__init__.py

-__version__ = '0.0.9'
+__version__ = '0.1.0'
 __author__ = 'gushitong@gmei.com'
 
 

gm_serializer/fields/descriptor.py

@@ -27,6 +27,10 @@ class MagicDescriptor(object):
 
         related_obj_pk = getattr(instance, "%s_id" % self.field.attname)
 
+        if not related_obj_pk:
+            # process `blank=True` and `null=True`
+            return None
+
         if getattr(instance, self.lazy_name, False):
             return related_obj_pk