From 89416d9856a2233b8f0c309720d9d746f2ac1e47 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bastien=20G=C3=A9rard?= <bastien.gerard@cluepoints.com>
Date: Fri, 5 Oct 2018 14:16:22 +0200
Subject: [PATCH] Fix deprecation warning about Hashable in py3.7

---
 mongoengine/base/document.py  | 2 +-
 mongoengine/python_support.py | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/mongoengine/base/document.py b/mongoengine/base/document.py
index c82d670e..ccbfa3d6 100644
--- a/mongoengine/base/document.py
+++ b/mongoengine/base/document.py
@@ -1,6 +1,5 @@
 import copy
 import numbers
-from collections import Hashable
 from functools import partial
 
 from bson import ObjectId, json_util
@@ -19,6 +18,7 @@ from mongoengine.base.fields import ComplexBaseField
 from mongoengine.common import _import_class
 from mongoengine.errors import (FieldDoesNotExist, InvalidDocumentError,
                                 LookUpError, OperationError, ValidationError)
+from mongoengine.python_support import Hashable
 
 __all__ = ('BaseDocument', 'NON_FIELD_ERRORS')
 
diff --git a/mongoengine/python_support.py b/mongoengine/python_support.py
index e884b4ea..7e8e108f 100644
--- a/mongoengine/python_support.py
+++ b/mongoengine/python_support.py
@@ -19,3 +19,10 @@ if not six.PY3:
         pass
     else:
         StringIO = cStringIO.StringIO
+
+
+if six.PY3:
+    from collections.abc import Hashable
+else:
+    # raises DeprecationWarnings in Python >=3.7
+    from collections import Hashable