fix json serializable error for active_queues

1 files changed, 9 insertions, 2 deletions

diff --git a/kombu/entity.py b/kombu/entity.py
index e0ea035e..f7b294c2 100644
--- a/kombu/entity.py
+++ b/kombu/entity.py
@@ -7,7 +7,7 @@ Exchange and Queue declarations.
 """
 from __future__ import absolute_import
 
-from .abstract import MaybeChannelBound
+from .abstract import MaybeChannelBound, Object
 from .exceptions import ContentDisallowed
 from .five import string_t
 from .serialization import prepare_accept_content
@@ -299,7 +299,7 @@ class Exchange(MaybeChannelBound):
         return not self.auto_delete
 
 
-class binding(object):
+class binding(Object):
     """Represents a queue or exchange binding.
 
     :keyword exchange: Exchange to bind to.
@@ -309,6 +309,13 @@ class binding(object):
 
     """
 
+    attrs = (
+        ('exchange', None),
+        ('routing_key', None),
+        ('arguments', None),
+        ('unbind_arguments', None)
+    )
+
     def __init__(self, exchange=None, routing_key='',
                  arguments=None, unbind_arguments=None):
         self.exchange = exchange