pierrejeambrun commented on code in PR #49994:
URL: https://github.com/apache/airflow/pull/49994#discussion_r2068711201
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airflow-core/src/airflow/models/asset.py:
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@@ -276,6 +276,19 @@ class AssetModel(Base):
producing_tasks = relationship("TaskOutletAssetReference",
back_populates="asset")
triggers = relationship("Trigger",
secondary=asset_trigger_association_table, back_populates="assets")
+ # ForeignKey("asset_event.id") -> this was originally in the
last_asset_event_id definition
+ # The default value should be None. When an Asset is defined, it is not
yet tied to an AssetEvent
+ last_asset_event_id = Column(Integer, default=None)
+ last_asset_event_timestamp = Column(UtcDateTime, default=None)
+
+ last_event = relationship(
+ "AssetEvent",
+ primaryjoin="AssetModel.last_asset_event_id == foreign(AssetEvent.id)",
+ viewonly=True,
+ lazy="select",
+ uselist=False,
+ )
Review Comment:
You'll need a subquery / CTE to get the latest asset event id and timestamp
per asset_id, then outer join that table with that query there yes.
https://github.com/apache/airflow/blob/27f559e87170b9059f018206bf6dbbaa76529afa/airflow/api_fastapi/core_api/routes/public/assets.py#L351
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