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fix: Preserve an unset aggregation time window across a proto round-trip · feast-dev/feast@175e64e · GitHub
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Rodrigo-Palmantkathole
Rodrigo-Palma
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ntkathole
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fix: Preserve an unset aggregation time window across a proto round-trip
Aggregation.__init__ types time_window and slide_interval as Optional and to_proto honours that: it only writes the Duration when the value is not None. from_proto tests the value instead of the presence, and an absent Duration also reports ToNanoseconds() == 0, so an aggregation defined without a window comes back with timedelta(0). That difference is load bearing. aggregation_specs_to_agg_ops rejects a windowed aggregation in online serving with 'if getattr(agg, "time_window", None) is not None', so an on demand feature view with a plain Aggregation(column=..., function=...) works in process and then fails with 'Time window aggregation is not supported in online serving.' on the first get_online_features after feast apply, whatever the registry. The same round-trip runs for StreamFeatureView. Read the field through HasField, which is available because both are google.protobuf.Duration message fields. Aggregation.__eq__ compares these two attributes, so this also stops a registry diff from seeing an unchanged feature view as modified. Signed-off-by: Rodrigo-Palma <email.rodrigopalma@gmail.com>
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Lines changed: 48 additions & 6 deletions

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‎sdk/python/feast/aggregation/__init__.py‎

Lines changed: 6 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -69,15 +69,15 @@ def to_proto(self) -> AggregationProto:
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@classmethod
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def from_proto(cls, agg_proto: AggregationProto):
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time_window = (
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timedelta(days=0)
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if agg_proto.time_window.ToNanoseconds() == 0
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else agg_proto.time_window.ToTimedelta()
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agg_proto.time_window.ToTimedelta()
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if agg_proto.HasField("time_window")
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else None
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)
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slide_interval = (
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timedelta(days=0)
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if agg_proto.slide_interval.ToNanoseconds() == 0
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else agg_proto.slide_interval.ToTimedelta()
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agg_proto.slide_interval.ToTimedelta()
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if agg_proto.HasField("slide_interval")
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else None
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)
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aggregation = cls(
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column=agg_proto.column,

‎sdk/python/tests/unit/test_on_demand_feature_view_aggregation.py‎

Lines changed: 42 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -17,6 +17,9 @@
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import pyarrow as pa
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from feast.aggregation import Aggregation
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from feast.field import Field
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from feast.on_demand_feature_view import OnDemandFeatureView, on_demand_feature_view
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from feast.types import Float32, Int64
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from feast.utils import _apply_aggregations_to_response
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@@ -87,3 +90,42 @@ def test_empty_data_returns_empty():
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result = _apply_aggregations_to_response(data, aggs, ["driver_id"], "python")
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assert result == data
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def test_aggregation_without_time_window_survives_proto_roundtrip():
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"""An Aggregation with no time window keeps None through to_proto/from_proto."""
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agg = Aggregation(column="trips", function="sum")
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assert agg.time_window is None
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assert agg.slide_interval is None
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restored = Aggregation.from_proto(agg.to_proto())
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assert restored.time_window is None
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assert restored.slide_interval is None
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assert restored == agg
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def test_odfv_aggregation_still_serves_online_after_proto_roundtrip():
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"""A registry round-trip must not turn an unset window into a zero window."""
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@on_demand_feature_view(
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sources=[],
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input_schema=[
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Field(name="driver_id", dtype=Int64),
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Field(name="trips", dtype=Int64),
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],
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schema=[Field(name="sum_trips", dtype=Float32)],
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aggregations=[Aggregation(column="trips", function="sum")],
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mode="python",
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)
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def agg_view(inputs):
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return {"sum_trips": inputs["sum_trips"]}
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restored = OnDemandFeatureView.from_proto(agg_view.to_proto())
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data = {"driver_id": [1, 1, 2, 2], "trips": [10, 20, 15, 25]}
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result = _apply_aggregations_to_response(
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data, restored.aggregations, ["driver_id"], "python"
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)
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assert result == {"driver_id": [1, 2], "sum_trips": [30, 40]}

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