PYTHON-1709 Always use codec_options in Database.current_op

(cherry picked from commit da2ba8d7ed)

doc/changelog.rst

@@ -16,6 +16,11 @@ Changes in Version 3.8.0.dev0
 - :class:`~bson.objectid.ObjectId` now implements the `ObjectID specification
   version 0.2 <https://github.com/mongodb/specifications/blob/master/source/objectid.rst>`_.
 
+- :meth:`~pymongo.database.Database.current_op` now always uses the
+  ``Database``'s  :attr:`~pymongo.database.Database.codec_options`
+  when decoding the command response. Previously the codec_options
+  was only used when the MongoDB server version was <= 3.0.
+
 Issues Resolved
 ...............
 

pymongo/database.py

@@ -828,9 +828,9 @@ class Database(common.BaseObject):
         cmd = SON([("currentOp", 1), ("$all", include_all)])
         with self.__client._socket_for_writes() as sock_info:
             if sock_info.max_wire_version >= 4:
-                with self.__client._tmp_session(session) as s:
-                    return sock_info.command("admin", cmd, session=s,
-                                             client=self.__client)
+                return self.__client.admin._command(
+                    sock_info, cmd, codec_options=self.codec_options,
+                    session=session)
             else:
                 spec = {"$all": True} if include_all else {}
                 return _first_batch(sock_info, "admin", "$cmd.sys.inprog",

test/test_database.py

@@ -942,6 +942,15 @@ class TestDatabase(IntegrationTest):
                                       "maxTimeAlwaysTimeOut",
                                       mode="off")
 
+    def test_current_op_codec_options(self):
+        class MySON(SON):
+            pass
+        opts = CodecOptions(document_class=MySON)
+        db = self.client.get_database("pymongo_test", codec_options=opts)
+        current_op = db.current_op(True)
+        self.assertTrue(current_op['inprog'])
+        self.assertIsInstance(current_op, MySON)
+
 
 if __name__ == "__main__":
     unittest.main()