[FIX] base: traceback on rpc call if data contain default dict

odoo/addons/base/controllers/rpc.py

@@ -4,6 +4,7 @@
 import xmlrpc.client
 from datetime import date, datetime
 
+from collections import defaultdict
 from markupsafe import Markup
 
 import odoo
@@ -109,6 +110,7 @@ def dump_lazy(self, value, write):
     dispatch[date] = dump_date
     dispatch[lazy] = dump_lazy
     dispatch[Command] = dispatch[int]
+    dispatch[defaultdict] = dispatch[dict]
     dispatch[Markup] = lambda self, value, write: self.dispatch[str](self, str(value), write)
 
 

odoo/addons/base/tests/test_xmlrpc.py

@@ -1,11 +1,13 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
+import collections
 import time
 from xmlrpc.client import Binary
 
 from odoo.exceptions import AccessDenied, AccessError
 from odoo.http import _request_stack
 
+import odoo
 import odoo.tools
 from odoo.tests import common
 from odoo.service import common as auth, model
@@ -72,6 +74,15 @@ def test_xmlrpc_frozendict_marshalling(self):
         self.assertEqual(ctx['lang'], 'en_US')
         self.assertEqual(ctx['tz'], 'Europe/Brussels')
 
+    def test_xmlrpc_defaultdict_marshalling(self):
+        """
+        Test that the marshalling of a collections.defaultdict object
+        works properly over XMLRPC
+        """
+        self.patch(self.registry['res.users'], 'context_get',
+                   odoo.api.model(lambda *_: collections.defaultdict(int)))
+        self.assertEqual(self.xmlrpc('res.users', 'context_get'), {})
+
     def test_jsonrpc_read_group(self):
         self._json_call(
             common.get_db_name(), self.admin_uid, 'admin',