Implement type validation #8

Author: jhgg

graphql/core/__init__.py

@@ -4,7 +4,7 @@
 from .validation import validate
 
 
-def graphql(schema, request='', root=None, vars=None, operation_name=None):
+def graphql(schema, request='', root=None, args=None, operation_name=None):
     try:
         source = Source(request, 'GraphQL request')
         ast = parse(source)
@@ -19,7 +19,7 @@ def graphql(schema, request='', root=None, vars=None, operation_name=None):
             root or object(),
             ast,
             operation_name,
-            vars or {},
+            args or {},
         )
     except Exception as e:
         return ExecutionResult(

graphql/core/execution/executor.py

@@ -291,7 +291,7 @@ def complete_value(self, ctx, return_type, field_asts, info, result):
         if not runtime_type:
             return None
 
-        if not runtime_type.is_type_of(result, info):
+        if runtime_type.is_type_of and not runtime_type.is_type_of(result, info):
             raise GraphQLError(
                 u'Expected value of type "{}" but got {}.'.format(return_type, type(result).__name__),
                 field_asts