kaxil opened a new pull request #7578: [AIRFLOW-6856] BugFix: Paused Dags still 
Scheduled
URL: https://github.com/apache/airflow/pull/7578
 
 
   https://github.com/apache/airflow/pull/7476/ introduced a bug due to which 
Paused Dags where still Scheduled.
   
   The Bug is the following query returns a list of sets:
   
   Query:
   ```
   paused_dag_ids = (
               session.query(DagModel.dag_id)
               .filter(DagModel.is_paused.is_(True))
               .filter(DagModel.dag_id.in_(dagbag.dag_ids))
               .all()
           )
   ```
   
   Result:
   ```
   [('example_bash_operator',)]
   ```
   Hence in `_find_dags_to_process()` (below):
   
   ```
           if len(self.dag_ids) > 0:
               dags = [dag for dag in dags
                       if dag.dag_id in self.dag_ids and
                       dag.dag_id not in paused_dag_ids]
           else:
               dags = [dag for dag in dags
                       if dag.dag_id not in paused_dag_ids]
           return dags
   ``` 
   
   following happens:
   
   ```
   dags = [dag for dag in dags if "example_bash_operator" not in 
[('example_bash_operator',)] ] 
   ```
   This evaluates to false. Instead `paused_dag_ids` should be 
`{'example_bash_operator'}` (A set) or just a list `['example_bash_operator']`
   
   
   ---
   Issue link: WILL BE INSERTED BY 
[boring-cyborg](https://github.com/kaxil/boring-cyborg)
   
   Make sure to mark the boxes below before creating PR: [x]
   
   - [x] Description above provides context of the change
   - [x] Commit message/PR title starts with `[AIRFLOW-NNNN]`. AIRFLOW-NNNN = 
JIRA ID<sup>*</sup>
   - [x] Unit tests coverage for changes (not needed for documentation changes)
   - [x] Commits follow "[How to write a good git commit 
message](http://chris.beams.io/posts/git-commit/)"
   - [x] Relevant documentation is updated including usage instructions.
   - [x] I will engage committers as explained in [Contribution Workflow 
Example](https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst#contribution-workflow-example).
   
   <sup>*</sup> For document-only changes commit message can start with 
`[AIRFLOW-XXXX]`.
   
   ---
   In case of fundamental code change, Airflow Improvement Proposal 
([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvements+Proposals))
 is needed.
   In case of a new dependency, check compliance with the [ASF 3rd Party 
License Policy](https://www.apache.org/legal/resolved.html#category-x).
   In case of backwards incompatible changes please leave a note in 
[UPDATING.md](https://github.com/apache/airflow/blob/master/UPDATING.md).
   Read the [Pull Request 
Guidelines](https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst#pull-request-guidelines)
 for more information.
   

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