Ember programmatically call controller action from hbs template

I have a defined action on my controller that makes a modal visible. In my hbs template, I am able to create a button and assign it the action. When I do this, I can make the modal appear by clicking the button.

I am trying to show the modal (call the controller action) without having to click anything. Is this possible? I want the modal to pop up based on a conditional on the model automatically.