jedcunningham commented on code in PR #48659:
URL: https://github.com/apache/airflow/pull/48659#discussion_r2138051918


##########
airflow-core/src/airflow/migrations/versions/0069_3_0_0_make_relative_fileloc_nullable_for_.py:
##########
@@ -0,0 +1,52 @@
+#
+# 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.
+
+"""
+make relative_fileloc nullable for reserialized all bundles.

Review Comment:
   ```suggestion
   Make DagPriorityParsingRuquest.relative_fileloc nullable.
   ```
   
   nit



##########
airflow-core/src/airflow/models/dagbag.py:
##########
@@ -685,12 +685,22 @@ class DagPriorityParsingRequest(Base):
     # Note: Do not depend on fileloc pointing to a file; in the case of a
     # packaged DAG, it will point to the subpath of the DAG within the
     # associated zip.
-    relative_fileloc = Column(String(2000), nullable=False)
+    relative_fileloc = Column(String(2000), nullable=True)
 
-    def __init__(self, bundle_name: str, relative_fileloc: str) -> None:
+    def __init__(self, bundle_name: str, relative_fileloc: str = "") -> None:

Review Comment:
   ```suggestion
       def __init__(self, bundle_name: str, relative_fileloc: str | None = 
None) -> None:
   ```
   
   If we are allowing nullable, lets actually use nulls then - otherwise we 
don't really need to alter the table in the first place.



##########
airflow-core/src/airflow/dag_processing/manager.py:
##########
@@ -413,20 +413,35 @@ def _queue_requested_files_for_parsing(self) -> None:
 
     @provide_session
     def _get_priority_files(self, session: Session = NEW_SESSION) -> 
list[DagFileInfo]:
-        files: list[DagFileInfo] = []
+        files: set[DagFileInfo] = set()
         bundles = {b.name: b for b in self._dag_bundles}
         requests = session.scalars(
             
select(DagPriorityParsingRequest).where(DagPriorityParsingRequest.bundle_name.in_(bundles.keys()))
         )
         for request in requests:
             bundle = bundles[request.bundle_name]
-            files.append(
-                DagFileInfo(
-                    rel_path=Path(request.relative_fileloc), 
bundle_name=bundle.name, bundle_path=bundle.path
+            if request.parse_whole_folder():
+                # If relative_fileloc is null, get all files from DagModel
+                dag_files = session.scalars(

Review Comment:
   We probably should refresh the bundle and [relist the dags from 
disk](https://github.com/apache/airflow/blob/bf0bfe9dc1f3812989acfe6ed7118acf9ba5b586/airflow-core/src/airflow/dag_processing/manager.py#L579)
 instead of querying the db.
   
   I think we can just refresh here, relist, and add, but it'd be worth giving 
it a bit more thought to make sure we aren't impacting other stuff by doing so.



##########
airflow-core/src/airflow/models/dagbag.py:
##########
@@ -685,12 +685,22 @@ class DagPriorityParsingRequest(Base):
     # Note: Do not depend on fileloc pointing to a file; in the case of a
     # packaged DAG, it will point to the subpath of the DAG within the
     # associated zip.
-    relative_fileloc = Column(String(2000), nullable=False)
+    relative_fileloc = Column(String(2000), nullable=True)
 
-    def __init__(self, bundle_name: str, relative_fileloc: str) -> None:
+    def __init__(self, bundle_name: str, relative_fileloc: str = "") -> None:
         super().__init__()
         self.bundle_name = bundle_name
         self.relative_fileloc = relative_fileloc
 
+    def parse_whole_folder(self) -> bool:
+        """
+        Check if this request should parse the whole folder based on 
relative_fileloc.
+
+        Returns:
+            bool: True if relative_fileloc is None, indicating the whole 
folder should be parsed,
+                 False otherwise.
+        """
+        return self.relative_fileloc == ""

Review Comment:
   ```suggestion
           return self.relative_fileloc is None
   ```



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