olchas commented on a change in pull request #11061:
URL: https://github.com/apache/airflow/pull/11061#discussion_r492584078
##########
File path: docs/howto/custom-operator.rst
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@@ -200,6 +200,35 @@ with actual value. Note that Jinja substitutes the
operator attributes and not t
In the example, the ``template_fields`` should be ``['guest_name']`` and not
``['name']``
+Additionally you may provide ``template_fields_renderers`` dictionary which
defines in what style the value
+from template field renders in Web UI. For example:
+
+.. code-block:: python
+
+ class MyRequestOperator(BaseOperator):
+ template_fields = ['request_body']
+ template_fields_renderers = {'request_body': 'json'}
+
+ @apply_defaults
+ def __init__(
+ self,
+ request_body: str,
+ **kwargs) -> None:
+ super().__init__(**kwargs)
+ self.request_body = name
+
+Currently available lexers:
+
+ - bash
+ - doc
+ - json
+ - md
+ - py
+ - rst
+ - sql
+ - yaml
+
+If you will use non existing lexer the value of the template filed be rendered
as pretty printed object.
Review comment:
```suggestion
If you use a non existing lexer then the value of the template field will be
rendered as a pretty printed object.
```
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