Safely convert items to IContentListingObject

news/1810.bugfix

@@ -0,0 +1,2 @@
+Safely convert objects to IContentListingObject
+[erral]

src/plone/restapi/serializer/summary.py

@@ -83,7 +83,10 @@ def __init__(self, context, request):
         self.blocklisted_attributes = metadata["blocklisted_attributes"]
 
     def __call__(self):
-        obj = IContentListingObject(self.context)
+        try:
+            obj = IContentListingObject(self.context)
+        except TypeError:
+            return {}
 
         summary = {}
         for field in self.metadata_fields():

src/plone/restapi/tests/test_serializer_summary.py

@@ -1,14 +1,20 @@
+from datetime import datetime
+from datetime import timedelta
 from DateTime import DateTime
 from plone.app.contentlisting.interfaces import IContentListingObject
+from plone.app.event.dx.traverser import OccurrenceTraverser
 from plone.app.testing import popGlobalRegistry
 from plone.app.testing import pushGlobalRegistry
 from plone.dexterity.utils import createContentInContainer
+from plone.event.interfaces import IEvent
+from plone.event.interfaces import IEventRecurrence
 from plone.restapi.interfaces import ISerializeToJsonSummary
 from plone.restapi.testing import PLONE_RESTAPI_DX_INTEGRATION_TESTING
 from plone.restapi.testing import register_static_uuid_utility
 from Products.CMFCore.utils import getToolByName
 from zope.component import getMultiAdapter
 from zope.component.hooks import getSite
+from zope.interface import alsoProvides
 
 import Missing
 import unittest
@@ -203,3 +209,47 @@ def test_dx_type_summary(self):
             },
             summary,
         )
+
+
+class TestSummarySerializerswithRecurrenceObjects(unittest.TestCase):
+    layer = PLONE_RESTAPI_DX_INTEGRATION_TESTING
+
+    def setUp(self):
+        self.portal = self.layer["portal"]
+        self.request = self.layer["request"]
+
+        pushGlobalRegistry(getSite())
+        register_static_uuid_utility(prefix="c6dcbd55ab2746e199cd4ed458")
+
+        behaviors = self.portal.portal_types.DXTestDocument.behaviors
+        behaviors = behaviors + (
+            "plone.eventbasic",
+            "plone.eventrecurrence",
+        )
+        self.portal.portal_types.DXTestDocument.behaviors = behaviors
+
+        self.event = createContentInContainer(
+            self.portal,
+            "DXTestDocument",
+            id="doc1",
+            title="Lorem Ipsum event",
+            description="Description event",
+            start=datetime.now(),
+            end=datetime.now() + timedelta(hours=1),
+            recurrence="RRULE:FREQ=DAILY;COUNT=3",  # see https://github.com/plone/plone.app.event/blob/master/plone/app/event/tests/base_setup.py
+        )
+
+        alsoProvides(self.event, IEvent)
+        alsoProvides(self.event, IEventRecurrence)
+
+    def tearDown(self):
+        popGlobalRegistry(getSite())
+
+    def test_dx_event_with_recurrence(self):
+        tomorrow = datetime.now() + timedelta(days=1)
+        tomorrow_str = tomorrow.strftime("%Y-%m-%d")
+        ot = OccurrenceTraverser(self.event, self.request)
+        ocurrence = ot.publishTraverse(self.request, tomorrow_str)
+        summary = getMultiAdapter((ocurrence, self.request), ISerializeToJsonSummary)()
+
+        self.assertEqual(summary, {})