MatrixManAtYrService opened a new issue, #25558:
URL: https://github.com/apache/airflow/issues/25558
### Apache Airflow version
main (development)
### What happened
Here's are two DAGs:
```python3
from airflow import Dataset, DAG
from datetime import datetime
qux = Dataset("qux")
with DAG(
dag_id="a1",
start_date=datetime(1970, 1, 1),
schedule_interval=None,
) as a1:
@a1.task(outlets=[qux])
def qux():
pass
qux()
with DAG(
dag_id="a2",
start_date=datetime(1970, 1, 1),
# schedule_on=[qux], # breaks if you enable this
) as a2:
@a2.task
def no_outlets():
pass
no_outlets()
```
They serialize ok if you leave commented the `schedule_on` entry in the
second definition, but it breaks like so if you enable it:
```
❯ airflow dags reserialize
...
/home/matt/src/airflow/airflow/models/dagbag.py:604 DeprecationWarning:
DAG.full_filepath is deprecated in favour of fileloc
[2022-08-05 14:36:50,070] {dagbag.py:604} ERROR - Failed to write serialized
DAG: /home/matt/today/8.5/dags/dataset_network_A.py
Traceback (most recent call last):
File "/home/matt/src/airflow/airflow/serialization/serialized_objects.py",
line 1066, in serialize_dag
dag_deps.update(DependencyDetector().detect_dag_dependencies(dag))
File "/home/matt/src/airflow/airflow/serialization/serialized_objects.py",
line 593, in detect_dag_dependencies
return [
File "/home/matt/src/airflow/airflow/serialization/serialized_objects.py",
line 598, in <listcomp>
dependency_id=x.uri,
AttributeError: '_TaskDecorator' object has no attribute 'uri'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/matt/src/airflow/airflow/models/dagbag.py", line 593, in
_serialize_dag_capturing_errors
dag_was_updated = SerializedDagModel.write_dag(
File "/home/matt/src/airflow/airflow/utils/session.py", line 68, in wrapper
return func(*args, **kwargs)
File "/home/matt/src/airflow/airflow/models/serialized_dag.py", line 154,
in write_dag
new_serialized_dag = cls(dag)
File "<string>", line 4, in __init__
File
"/home/matt/today/8.5/venv/lib/python3.9/site-packages/sqlalchemy/orm/state.py",
line 482, in _initialize_instance
manager.dispatch.init_failure(self, args, kwargs)
File
"/home/matt/today/8.5/venv/lib/python3.9/site-packages/sqlalchemy/util/langhelpers.py",
line 70, in __exit__
compat.raise_(
File
"/home/matt/today/8.5/venv/lib/python3.9/site-packages/sqlalchemy/util/compat.py",
line 208, in raise_
raise exception
File
"/home/matt/today/8.5/venv/lib/python3.9/site-packages/sqlalchemy/orm/state.py",
line 479, in _initialize_instance
return manager.original_init(*mixed[1:], **kwargs)
File "/home/matt/src/airflow/airflow/models/serialized_dag.py", line 101,
in __init__
dag_data = SerializedDAG.to_dict(dag)
File "/home/matt/src/airflow/airflow/serialization/serialized_objects.py",
line 1175, in to_dict
json_dict = {"__version": cls.SERIALIZER_VERSION, "dag":
cls.serialize_dag(var)}
File "/home/matt/src/airflow/airflow/serialization/serialized_objects.py",
line 1083, in serialize_dag
raise SerializationError(f'Failed to serialize DAG {dag.dag_id!r}: {e}')
airflow.exceptions.SerializationError: Failed to serialize DAG 'a2':
'_TaskDecorator' object has no attribute 'uri'
```
### What you think should happen instead
No error
### How to reproduce
Run `airflow dags reserialize` with the above file in your folder
### Operating System
NixOS 21.11 (linux kernel 5.0.101)
### Versions of Apache Airflow Providers
n/a
### Deployment
Virtualenv installation
### Deployment details
_No response_
### Anything else
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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