danmactough opened a new pull request #5404: [AIRFLOW-4760] Fix package DAGs disappearing from DagBag when reloaded URL: https://github.com/apache/airflow/pull/5404 Make sure you have checked _all_ steps below. ### Jira - [x] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR" - https://issues.apache.org/jira/browse/AIRFLOW-4760 ### Description - [x] Here are some details about my PR, including screenshots of any UI changes: [AIRFLOW-2900](https://github.com/apache/airflow/pull/3749) introduced a change that broke Airflow whenever it tries to reprocess a packaged DAG. Since that change, the `fileloc` column in the database for packaged DAGs isn't an actual filepath. It looks something like: `/usr/local/airflow/dags/package.zip/my_dag.py` -- **notice that the path to the DAG inside the zip is appended to the zip file's path**. Then, when the `DagBag#process_file` method tries to load that filepath, it bails because that filepath is invalid. This PR fixes that behavior by updating the `DagBag#get_dag` method such that when it fetches the DAG from the database and proceeds to reprocess the file, instead of using the `orm_dag.fileloc` property directly, we reuse the `correct_maybe_zipped` helper function to ensure that the passed value is an actual filepath. #### Before  #### After  ### Tests - [x] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason: - add a sanity check test to ensure that the `fileloc` property does not change for packaged DAGs - add a test to verify that packaged DAGs can be refreshed - add a test that plain `.py` DAGs can also be refreshed (seems silly to have test coverage for only packaged DAGs 😄) ### Commits - [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)": 1. Subject is separated from body by a blank line 1. Subject is limited to 50 characters (not including Jira issue reference) 1. Subject does not end with a period 1. Subject uses the imperative mood ("add", not "adding") 1. Body wraps at 72 characters 1. Body explains "what" and "why", not "how" ### Documentation - [x] In case of new functionality, my PR adds documentation that describes how to use it. - All the public functions and the classes in the PR contain docstrings that explain what it does - If you implement backwards incompatible changes, please leave a note in the [Updating.md](https://github.com/apache/airflow/blob/master/UPDATING.md) so we can assign it to a appropriate release ### Code Quality - [ ] Passes `flake8`
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