yuqian90 commented on a change in pull request #11335:
URL: https://github.com/apache/airflow/pull/11335#discussion_r561822542
##########
File path: airflow/models/taskinstance.py
##########
@@ -1576,28 +1574,22 @@ def get(
}
def get_rendered_template_fields(self):
- """
- Fetch rendered template fields from DB if Serialization is enabled.
- Else just render the templates
- """
+ """Fetch rendered template fields from DB"""
from airflow.models.renderedtifields import RenderedTaskInstanceFields
- if STORE_SERIALIZED_DAGS:
- rendered_task_instance_fields =
RenderedTaskInstanceFields.get_templated_fields(self)
- if rendered_task_instance_fields:
- for field_name, rendered_value in
rendered_task_instance_fields.items():
- setattr(self.task, field_name, rendered_value)
- else:
- try:
- self.render_templates()
- except (TemplateAssertionError, UndefinedError) as e:
- raise AirflowException(
- "Webserver does not have access to User-defined Macros
or Filters "
- "when Dag Serialization is enabled. Hence for the task
that have not yet "
- "started running, please use 'airflow tasks render'
for debugging the "
- "rendering of template_fields."
- ) from e
+ rendered_task_instance_fields =
RenderedTaskInstanceFields.get_templated_fields(self)
+ if rendered_task_instance_fields:
+ for field_name, rendered_value in
rendered_task_instance_fields.items():
+ setattr(self.task, field_name, rendered_value)
else:
- self.render_templates()
+ try:
+ self.render_templates()
+ except (TemplateAssertionError, UndefinedError) as e:
+ raise AirflowException(
+ "Webserver does not have access to User-defined Macros or
Filters "
Review comment:
Hi @kaxil , if using Airflow 2.0 or using Airflow 1.10.* with
`store_serialized_dags = True` turned on, we hit this error here when user
clicks on "Rendered Template" on tasks that are using `user_defined_macros` in
jinja template fields.
We also hit a similar problem if user clears `ExternalTaskMarker` that uses
`user_defined_macros` in the jinja template fields (because the `dag.clear()`
function calls `ti.render_templates()` to figure out the actual values of the
template fields.
How do you recommend addressing these issues going forward? Should we allow
some webserver functions to get access to these `user_defined_macros`? Or
should we serialize the rendered template values so that webserver can access
them?
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