fix(parser): change ApproximateCreationDateTime field to datetime in DynamoDBStreamChangedRecordModel (#3049)

fix: promote ApproximateCreationDateTime to datetime

Author: waveFrontSet

aws_lambda_powertools/utilities/parser/models/dynamodb.py

@@ -1,4 +1,4 @@
-from datetime import date
+from datetime import datetime
 from typing import Any, Dict, List, Optional, Type, Union
 
 from pydantic import BaseModel
@@ -7,7 +7,7 @@
 
 
 class DynamoDBStreamChangedRecordModel(BaseModel):
-    ApproximateCreationDateTime: Optional[date] = None
+    ApproximateCreationDateTime: Optional[datetime] = None
     Keys: Dict[str, Dict[str, Any]]
     NewImage: Optional[Union[Dict[str, Any], Type[BaseModel], BaseModel]] = None
     OldImage: Optional[Union[Dict[str, Any], Type[BaseModel], BaseModel]] = None

tests/events/dynamoStreamEvent.json

@@ -4,6 +4,7 @@
       "eventID": "1",
       "eventVersion": "1.0",
       "dynamodb": {
+        "ApproximateCreationDateTime": 1693997155.0,
         "Keys": {
           "Id": {
             "N": "101"

tests/unit/data_classes/test_dynamo_db_stream_event.py

@@ -33,7 +33,7 @@ def test_dynamodb_stream_trigger_event():
     assert record.user_identity is None
     dynamodb = record.dynamodb
     assert dynamodb is not None
-    assert dynamodb.approximate_creation_date_time is None
+    assert dynamodb.approximate_creation_date_time == record_raw["dynamodb"]["ApproximateCreationDateTime"]
     keys = dynamodb.keys
     assert keys is not None
     assert keys["Id"] == decimal_context.create_decimal(101)

tests/unit/parser/test_dynamodb.py

@@ -55,7 +55,8 @@ def test_dynamo_db_stream_trigger_event_no_envelope():
     dynamodb = record.dynamodb
     raw_dynamodb = raw_record["dynamodb"]
     assert dynamodb is not None
-    assert dynamodb.ApproximateCreationDateTime is None
+    assert dynamodb.ApproximateCreationDateTime is not None
+    assert dynamodb.ApproximateCreationDateTime.timestamp() == raw_dynamodb["ApproximateCreationDateTime"]
     assert dynamodb.OldImage is None
     assert dynamodb.SequenceNumber == raw_dynamodb["SequenceNumber"]
     assert dynamodb.SizeBytes == raw_dynamodb["SizeBytes"]