ruby on rails fleximage plugin

How do I display the image in a view?

The documentation says:

<%= image_tag formatted_photo_path(@photo, :开发者_开发问答jpg) %>

This is not what I want.

I just want to display an image on a view I don't care about the url.

E.g., Avatar.

Do I need to write a path to the directory or is a method already made?

/public/images/avatar/id

Thank you

---

Does the example above not render something like this to the view?

<img src="/path-to-generated-image.jpg"/>