This returns the name (including path) of your current layout:

response.layout
=> "layouts/admin" # inside views that are using the 'admin' layout

UI/UX Design by

We make sure that your target audience has the best possible experience with your digital product. You get:

• Design tailored to your audience
• Proven processes customized to your needs
• An expert team of experienced designers

Read more Show archive.org snapshot

You most likely do not need the full path, so go ahead and do this:

File.basename(response.layout)
=> "admin"