update

circle/dashboard/serializers.py

@@ -159,9 +159,8 @@ class CreateDiskSerializer(serializers.Serializer):
     size = serializers.CharField(max_length=50)
     name = serializers.CharField(max_length=100)
     datastore = serializers.CharField(max_length=40, required=False, allow_blank=True, default=None)
-    cache_size = serializers.IntegerField(required=False, allow_blank=True, default=1024)
-    cluster_size = serializers.IntegerField(required=False, allow_blank=True, default=64)
-
+    cache_size = serializers.IntegerField(initial=1024)
+    cluster_size = serializers.IntegerField(initial=64)
 
 class ResizeDiskSerializer(serializers.Serializer):
     size = serializers.CharField(max_length=50)

circle/dashboard/views/vm.py

@@ -138,10 +138,10 @@ class CreatePersistentDiskREST(APIView):
                 datastore = data['datastore']
             cache_size = 1024
             if 'cache_size' in data:
-                cache_size = data['cache_size']
+                cache_size = int(data['cache_size'])
             cluster_size = 64
             if 'cluster_size' in data:
-                cluster_size = data['cluster_size'] 
+                cluster_size = int(data['cluster_size'])
             disk = Disk.create(size=disk_size, name=disk_name, type="qcow2-norm", datastore=datastore, cache_size=cache_size, cluster_size=cluster_size)
             disk.full_clean()
             disk.dev_num = 'f'