josh-fell opened a new pull request #21054:
URL: https://github.com/apache/airflow/pull/21054
Related: #19047
Closes: #12876
This PR intends to improve both the handling of `template_fields` values
declared as strings (most typically seen as `template_fields = ("some_field")`
as well as the error message for declaring `template_fields` that are not
attributes of the operator. In the first case, a warning is logged and the
`template_fields` is "automagically" converted to a list for the task
execution. For the second case, the error message is updated from the default
`AttributeError` to something more specific to what is happening when
attempting to render any template fields.
---
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