BasPH commented on a change in pull request #5461: [AIRFLOW-4835] Refactor
render_template
URL: https://github.com/apache/airflow/pull/5461#discussion_r310691632
##########
File path: airflow/models/baseoperator.py
##########
@@ -636,51 +636,73 @@ def __setstate__(self, state):
self.__dict__ = state
self._log = logging.getLogger("airflow.task.operators")
- def render_template_from_field(self, attr, content, context, jinja_env):
+ def render_template_fields(self, context: Dict, jinja_env:
Optional[jinja2.Environment] = None) -> None:
"""
- Renders a template from a field. If the field is a string, it will
- simply render the string and return the result. If it is a collection
or
- nested set of collections, it will traverse the structure and render
- all elements in it. If the field has another type, it will return it
as it is.
+ Template all attributes listed in template_fields. Note this operation
is irreversible.
+
+ :param context: Dict with values to apply on content
+ :type context: dict
+ :param jinja_env: Jinja environment
+ :type jinja_env: jinja2.Environment
+ """
+
+ if not jinja_env:
+ jinja_env = self.get_template_env()
+
+ for attr_name in self.template_fields:
+ content = getattr(self, attr_name)
+ if content:
+ rendered_content = self.render_template(content, context,
jinja_env)
+ setattr(self, attr_name, rendered_content)
+
+ def render_template(
+ self, content: Any, context: Dict, jinja_env:
Optional[jinja2.Environment] = None
+ ) -> Any:
"""
- rt = self.render_template
+ Render a templated string. The content can be a collection holding
multiple templated strings and will
+ be templated recursively.
+
+ :param content: Content to template. Only strings can be templated
(may be inside collection).
+ :type content: Any
+ :param context: Dict with values to apply on templated content
+ :type context: dict
+ :param jinja_env: Jinja environment. Can be provided to avoid
re-creating Jinja environments during
+ recursion.
+ :type jinja_env: jinja2.Environment
+ :return: Templated content
+ """
+
+ if not jinja_env:
+ jinja_env = self.get_template_env()
+
if isinstance(content, str):
- result = jinja_env.from_string(content).render(**context)
- elif isinstance(content, tuple):
+ if any([content.endswith(ext) for ext in self.template_ext]):
Review comment:
Thanks, never realized this! 😄 Fixed
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