dstandish commented on code in PR #44712:
URL: https://github.com/apache/airflow/pull/44712#discussion_r1874087967


##########
airflow/models/deadline.py:
##########
@@ -0,0 +1,90 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+from __future__ import annotations
+
+from datetime import datetime
+from typing import TYPE_CHECKING
+
+import sqlalchemy_jsonfield
+from sqlalchemy import Column, DateTime, Index, Integer, String
+
+from airflow.models.base import Base, StringID
+from airflow.settings import json
+from airflow.utils.log.logging_mixin import LoggingMixin
+from airflow.utils.session import NEW_SESSION, provide_session
+
+if TYPE_CHECKING:
+    from sqlalchemy.orm import Session
+
+
+class Deadline(Base, LoggingMixin):
+    """A Deadline is a 'need-by' date which triggers a callback if the 
provided time has passed."""
+
+    __tablename__ = "deadline"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+
+    # If the Deadline Alert is for a DAG, store the DAG ID and Run ID from the 
dag_run.
+    dag_id = Column(StringID())

Review Comment:
   you could include dag_id too, not really a problem with that. 



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