2 files changed, 22 insertions, 2 deletions

diff --git a/src/mailman_pgp/rest/tests/test_lists.py b/src/mailman_pgp/rest/tests/test_lists.py
index 8e3ba31..5d7c6aa 100644
--- a/src/mailman_pgp/rest/tests/test_lists.py
+++ b/src/mailman_pgp/rest/tests/test_lists.py
@@ -21,6 +21,7 @@ from urllib.error import HTTPError
 
 from mailman.app.lifecycle import create_list
 from mailman.interfaces.action import Action
+from mailman.interfaces.member import MemberRole
 from mailman.testing.helpers import call_api
 from pgpy import PGPKey
 
@@ -170,6 +171,16 @@ class TestListConfig(TestCase):
         self.assertEqual(response.status_code, 204)
         self.assertEqual(self.pgp_list.unsigned_msg_action, Action.defer)
 
+    def test_patch_set(self):
+        json, response = call_api(
+                'http://localhost:9001/3.1/plugins/pgp/lists/'
+                'test.example.com',
+                data=dict(key_signing_allowed=['member', 'owner']),
+                method='PATCH')
+        self.assertEqual(response.status_code, 204)
+        self.assertEqual(self.pgp_list.key_signing_allowed,
+                         {MemberRole.member, MemberRole.owner})
+
     def test_patch_wrong_attribute(self):
         with self.assertRaises(HTTPError) as cm:
             call_api('http://localhost:9001/3.1/plugins/pgp/lists/'
diff --git a/src/mailman_pgp/utils/rest.py b/src/mailman_pgp/utils/rest.py
index 4e31b0c..a44575c 100644
--- a/src/mailman_pgp/utils/rest.py
+++ b/src/mailman_pgp/utils/rest.py
@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU General Public License along with
 # this program.  If not, see <http://www.gnu.org/licenses/>.
+import ast
 
 
 class enumflag_validator:
@@ -26,8 +27,16 @@ class enumflag_validator:
             for val in value:
                 result.add(self.enum[val])
             return result
-
-        return {self.enum[value]}
+        if value in self.enum:
+            return {self.enum[value]}
+        else:
+            l = ast.literal_eval(value)
+            if isinstance(l, (list, tuple)):
+                result = set()
+                for val in l:
+                    result.add(self.enum[val])
+                return result
+            raise ValueError
 
 
 class workflow_validator: