Limess opened a new issue, #31014:
URL: https://github.com/apache/airflow/issues/31014
### Apache Airflow version
2.6.0
### What happened
When clicking the "Trigger DAG w/ config" in a DAG UI I receive a 500 "Oops"
page.
The Airflow webserver logs show this:
```
2023-05-02T13:02:50 - [2023-05-02T12:02:50.249+0000] {app.py:1744} ERROR -
Exception on /trigger [GET]
2023-05-02T13:02:50 - Traceback (most recent call last):
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask/app.py", line 2529, in
wsgi_app
2023-05-02T13:02:50 - response = self.full_dispatch_request()
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask/app.py", line 1825, in
full_dispatch_request
2023-05-02T13:02:50 - rv = self.handle_user_exception(e)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask/app.py", line 1823, in
full_dispatch_request
2023-05-02T13:02:50 - rv = self.dispatch_request()
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask/app.py", line 1799, in
dispatch_request
2023-05-02T13:02:50 - return
self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/auth.py", line
47, in decorated
2023-05-02T13:02:50 - return func(*args, **kwargs)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/decorators.py",
line 125, in wrapper
2023-05-02T13:02:50 - return f(*args, **kwargs)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/utils/session.py",
line 76, in wrapper
2023-05-02T13:02:50 - return func(*args, session=session, **kwargs)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/views.py", line
1967, in trigger
2023-05-02T13:02:50 - return self.render_template(
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/views.py", line
640, in render_template
2023-05-02T13:02:50 - return super().render_template(
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask_appbuilder/baseviews.py",
line 339, in render_template
2023-05-02T13:02:50 - return render_template(
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask/templating.py", line
147, in render_template
2023-05-02T13:02:50 - return _render(app, template, context)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask/templating.py", line
130, in _render
2023-05-02T13:02:50 - rv = template.render(context)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/jinja2/environment.py", line
1301, in render
2023-05-02T13:02:50 - self.environment.handle_exception()
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/jinja2/environment.py", line
936, in handle_exception
2023-05-02T13:02:50 - raise rewrite_traceback_stack(source=source)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/templates/airflow/trigger.html",
line 106, in top-level template code
2023-05-02T13:02:50 - <span class="help-block">{{
form_details.description }}</span>
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/templates/airflow/main.html",
line 21, in top-level template code
2023-05-02T13:02:50 - {% from 'airflow/_messages.html' import
show_message %}
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html",
line 2, in top-level template code
2023-05-02T13:02:50 - {% import 'appbuilder/baselib.html' as baselib %}
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask_appbuilder/templates/appbuilder/init.html",
line 42, in top-level template code
2023-05-02T13:02:50 - {% block body %}
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html",
line 19, in block 'body'
2023-05-02T13:02:50 - {% block content %}
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/templates/airflow/trigger.html",
line 162, in block 'content'
2023-05-02T13:02:50 - {{ form_element(form_key, form_details) }}
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/jinja2/runtime.py", line 777,
in _invoke
2023-05-02T13:02:50 - rv = self._func(*arguments)
2023-05-02T13:02:50 - File
"/opt/airflow/.local/lib/python3.10/site-packages/airflow/www/templates/airflow/trigger.html",
line 83, in template
2023-05-02T13:02:50 - {%- for txt in form_details.value -%}
2023-05-02T13:02:50 - TypeError: 'NoneType' object is not iterable
```
### What you think should happen instead
No error is shown (worked in 2.5.2)
### How to reproduce
Create a DAG with the following config defined for parameters:
```
params={
"delete_actions": Param(
False,
description="Whether to delete actions after execution.",
type="boolean",
),
"dates": Param(
None,
description="An explicit list of date strings to run on.",
type=["null", "array"],
minItems=1,
),
"start_date_inclusive": Param(
None,
description="An inclusive start-date used to generate a list
of dates to run on.",
type=["null", "string"],
pattern="^[0-9]{4}[-/][0-9]{2}[-/][0-9]{2}$",
),
"end_date_exclusive": Param(
None,
description="An exclusive end-date used to generate a list
of dates to run on.",
type=["null", "string"],
pattern="^[0-9]{4}[-/][0-9]{2}[-/][0-9]{2}$",
),
"actions_bucket_name": Param(
None,
description='An S3 bucket to read batch actions from. Set as
"ACTIONS_BUCKET".',
type=["null", "string"],
),
"actions_path_prefix": Param(
None,
description='An S3 bucket to read batch actions from.
Prefixes "ACTIONS_PATH".',
type=["null", "string"],
pattern="^.+/$",
),
"sns_output_topic_name": Param(
None,
description='An SNS output topic ARN to set as
"DATA_READY_TO_INDEX_OUTPUT_TOPIC."',
type=["null", "string"],
),
},
# required to convert params to their correct types
render_template_as_native_obj=True,
```
Deploy the DAG, click the manual trigger button.
### Operating System
Debian
### Versions of Apache Airflow Providers
N/A
### Deployment
Other Docker-based deployment
### Deployment details
Amazon ECS
Python version: 3.10.11
Airflow version: 2.6.0 (official docker image as base)
### Anything else
Occurs every time.
Does *NOT* occur when `params` are not defined on the DAG.
### 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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