Output trancriptions IDs in CreateTranscriptions endpoint

arkindex/documents/serializers/ml.py

@@ -367,6 +367,7 @@ class AnnotatedElementSerializer(serializers.Serializer):
 
 
 class TranscriptionBulkItemSerializer(serializers.Serializer):
+    id = serializers.UUIDField(read_only=True)
     element_id = serializers.UUIDField(
         help_text='ID of an existing element to add the transcription to'
     )

arkindex/documents/tests/test_bulk_transcriptions.py

@@ -85,6 +85,32 @@ class TestBulkTranscriptions(FixtureAPITestCase):
             }, format='json')
             self.assertEqual(response.status_code, status.HTTP_201_CREATED)
 
+        first_tr, second_tr = element1.transcriptions.values_list('id', flat=True)
+        third_tr = element2.transcriptions.values_list('id', flat=True)[0]
+        self.assertEqual(response.json(), {
+            "worker_version": str(self.worker_version.id),
+            "transcriptions": [
+                {
+                    "id": str(first_tr),
+                    "element_id": str(element1.id),
+                    "text": "Sneasel",
+                    "confidence": 0.54,
+                },
+                {
+                    "id": str(third_tr),
+                    "element_id": str(element2.id),
+                    "text": "Charizard",
+                    "confidence": 0.85,
+                },
+                {
+                    "id": str(second_tr),
+                    "element_id": str(element1.id),
+                    "text": "Raticate",
+                    "confidence": 0.12,
+                },
+            ]
+        })
+
         self.assertCountEqual(
             list(element1.transcriptions.values('text', 'confidence')),
             [