From 042325192a1d2e1772ff4bd9891b7af8812c2f48 Mon Sep 17 00:00:00 2001
From: Syrus Akbary <me@syrusakbary.com>
Date: Fri, 9 Oct 2015 22:39:29 -0700
Subject: [PATCH] Added ability to set up a custom graphql executor. Fixed #7.
 Added automatic field ordering as default

---
 graphene/core/schema.py | 41 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 36 insertions(+), 5 deletions(-)

diff --git a/graphene/core/schema.py b/graphene/core/schema.py
index 69241185..38312c59 100644
--- a/graphene/core/schema.py
+++ b/graphene/core/schema.py
@@ -1,9 +1,18 @@
 from functools import wraps
+from collections import OrderedDict
 
 from graphql.core import graphql
 from graphql.core.type import (
     GraphQLSchema as _GraphQLSchema
 )
+
+from graphql.core.execution.executor import Executor
+from graphql.core.execution.middlewares.sync import SynchronousExecutionMiddleware
+from graphql.core.execution import ExecutionResult, execute
+from graphql.core.language.parser import parse
+from graphql.core.language.source import Source
+from graphql.core.validation import validate
+
 from graphql.core.utils.introspection_query import introspection_query
 from graphene import signals
 from graphene.utils import cached_property
@@ -17,12 +26,14 @@ class GraphQLSchema(_GraphQLSchema):
 
 class Schema(object):
     _query = None
+    _executor = None
 
-    def __init__(self, query=None, mutation=None, name='Schema'):
+    def __init__(self, query=None, mutation=None, name='Schema', executor=None):
         self._internal_types = {}
         self.mutation = mutation
         self.query = query
         self.name = name
+        self.executor = executor
         signals.init_schema.send(self)
 
     def __repr__(self):
@@ -37,6 +48,16 @@ class Schema(object):
         self._query = query
         self._query_type = query and query.internal_type(self)
 
+    @property
+    def executor(self):
+        if not self._executor:
+            self.executor = Executor([SynchronousExecutionMiddleware()], map_type=OrderedDict)
+        return self._executor
+
+    @executor.setter
+    def executor(self, value):
+        self._executor = value
+
     @cached_property
     def schema(self):
         if not self._query_type:
@@ -63,12 +84,22 @@ class Schema(object):
 
     def execute(self, request='', root=None, vars=None, operation_name=None):
         root = root or object()
-        return graphql(
+        source = Source(request, 'GraphQL request')
+        ast = parse(source)
+        validation_errors = validate(self.schema, ast)
+        if validation_errors:
+            return ExecutionResult(
+                errors=validation_errors,
+                invalid=True,
+            )
+
+        return self.executor.execute(
             self.schema,
-            request=request,
+            ast,
             root=self.query(root),
-            vars=vars,
-            operation_name=operation_name
+            args=vars,
+            operation_name=operation_name,
+            validate_ast=False
         )
 
     def introspect(self):