From 58ee14bfb1c1c24d06fb0509e42e06e37a505479 Mon Sep 17 00:00:00 2001
From: Barry Warsaw
Date: Mon, 11 Jan 2016 09:35:14 -0500
Subject: Use the more efficient find_member() API.

---
 src/mailman/rest/lists.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/mailman/rest/lists.py b/src/mailman/rest/lists.py
index a4d2da56a..a2b9b4a9c 100644
--- a/src/mailman/rest/lists.py
+++ b/src/mailman/rest/lists.py
@@ -151,12 +151,11 @@ class AList(_ListBase):
         """Return a single member representation."""
         if self._mlist is None:
             return NotFound(), []
-        members = getUtility(ISubscriptionService).find_members(
+        member = getUtility(ISubscriptionService).find_member(
             email, self._mlist.list_id, role)
-        if len(members) == 0:
+        if member is None:
             return NotFound(), []
-        assert len(members) == 1, 'Too many matches'
-        return AMember(request.context['api_version'], members[0].member_id)
+        return AMember(request.context['api_version'], member.member_id)
 
     @child(roster_matcher)
     def roster(self, request, segments, role):
-- 
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