Patching private variables

graphene/types/tests/test_objecttype.py

@@ -65,7 +65,7 @@ def test_generate_objecttype_with_fields():
 
 def test_generate_objecttype_with_private_attributes():
     class MyObjectType(ObjectType):
-        _private_state = None
+        _private_state = Field(MyType)
 
     assert '_private_state' not in MyObjectType._meta.fields
     assert hasattr(MyObjectType, '_private_state')

graphene/types/tests/test_query.py

@@ -297,6 +297,27 @@ def test_query_middlewares():
     assert executed.data == {'hello': 'dlroW', 'other': 'rehto'}
 
 
+def test_query_private_values():
+    class MyType(ObjectType):
+        _private = String()
+        public = String()
+
+    class Query(ObjectType):
+        field = Field(MyType)
+
+    hello_schema = Schema(Query)
+
+    executed = hello_schema.execute('{ field { Private } }')
+    assert executed.errors
+
+    executed = hello_schema.execute('{ field { _private } }')
+    assert executed.errors
+
+    executed = hello_schema.execute('{ field { public } }')
+    assert not executed.errors
+    assert executed.data == {'field': None}
+
+
 def test_objecttype_on_instances():
     class Ship:
 
@@ -442,8 +463,6 @@ def test_big_list_of_containers_multiple_fields_custom_resolvers_query_benchmark
 
 
 def test_query_annotated_resolvers():
-    import json
-
     context = Context(key="context")
 
     class Query(ObjectType):

graphene/types/utils.py

@@ -28,6 +28,8 @@ def yank_fields_from_attrs(attrs, _as=None, sort=True):
     '''
     fields_with_names = []
     for attname, value in list(attrs.items()):
+        if attname.startswith('_'):
+            continue
         field = get_field_as(value, _as)
         if not field:
             continue