build: recognize collection_model_binding_data for batch inputs

azure_functions_worker/bindings/datumdef.py

@@ -102,6 +102,8 @@ def from_typed_data(cls, td: protos.TypedData):
             val = td.collection_sint64
         elif tt == 'model_binding_data':
             val = td.model_binding_data
+        elif tt == 'collection_model_binding_data':
+            val = td.collection_model_binding_data
         elif tt is None:
             return None
         else:

azure_functions_worker/bindings/meta.py

@@ -300,6 +300,15 @@ def deferred_bindings_decode(binding: typing.Any,
     """
     global deferred_bindings_cache
 
+    # Only applies to Event Hub and Service Bus - cannot cache
+    # These types will always produce different content and are not clients
+    if (datum.type == "collection_model_binding_data"
+            or datum.value.source == "AzureEventHubsEventData"
+            or datum.value.source == "AzureServiceBusReceivedMessage"):
+        return binding.decode(datum,
+                              trigger_metadata=metadata,
+                              pytype=pytype)
+
     if deferred_bindings_cache.get((pb.name,
                                     pytype,
                                     datum.value.content,

tests/extension_tests/deferred_bindings_tests/test_deferred_bindings.py

@@ -137,7 +137,7 @@ async def test_deferred_bindings_dual_enabled_log(self):
                                               "is only supported for 3.9+.")
 class TestDeferredBindingsHelpers(testutils.AsyncTestCase):
 
-    def test_deferred_bindings_enabled_decode(self):
+    def test_mbd_deferred_bindings_enabled_decode(self):
         binding = BlobClientConverter
         pb = protos.ParameterBinding(name='test',
                                      data=protos.TypedData(

tests/unittests/test_types.py

@@ -194,3 +194,26 @@ def test_model_binding_data_td_ok(self):
         mbd_datum = datumdef.Datum.from_typed_data(mock_mbd)
 
         self.assertEqual(mbd_datum.type, 'model_binding_data')
+
+    def test_collection_model_binding_data_datum_ok(self):
+        sample_mbd = MockMBD(version="1.0",
+                             source="AzureStorageBlobs",
+                             content_type="application/json",
+                             content="{\"Connection\":\"python-worker-tests\","
+                                     "\"ContainerName\":\"test-blob\","
+                                     "\"BlobName\":\"test.txt\"}")
+        sample_cmbd = [sample_mbd, sample_mbd]
+
+        datum: bind_meta.Datum = bind_meta.Datum(value=sample_cmbd,
+                                                 type='collection_model_binding_data')
+
+        self.assertEqual(datum.value, sample_cmbd)
+        self.assertEqual(datum.type, "collection_model_binding_data")
+
+    def test_collection_model_binding_data_td_ok(self):
+        mock_cmbd = protos.TypedData(
+            collection_model_binding_data={'model_binding_data': [{'version': '1.0'}]}
+        )
+        cmbd_datum = datumdef.Datum.from_typed_data(mock_cmbd)
+
+        self.assertEqual(cmbd_datum.type, 'collection_model_binding_data')