Selecting all records via an action if no records are selected

[sageworksstudio]

From these docs:
https://docs.avohq.io/3.0/guides/export-to-csv.html

I uncommented this line:
records = resource.model_class.all if records.blank?

But the action simply does nothing unless I select at least one record. How do I run an action when no record is selected?

[sageworksstudio]

Answering myself:

Add this to my_action.rb

self.standalone = true