Rails 4 - Name Of Current Layout?

Question

I've found numerous resources for Rails 3, but none for Rails 4:

---

In an effort to keep things DRY, we have a method which defines some meta tags. I'd like to include the layout in the title param:

  #app/controllers/application_controller.rb
  before_action :set_meta_tags

  def set_meta_tags
    title = (layout != "application") ? "#{layout} ::" : false
    set_meta title: "#{layout} #{setting(:site, :title)}", description: setting(:site, :description)
  end

Only problem is I don't know how to return the current layout in Rails 4 - any help will be greatly appreciated!

Answer 1

For me in Rails 6 the current_layout method would look like this

def current_layout
  self.controller.send :_layout, self.lookup_context, []
end

I believe the array is a list of formats used. The method _layout is build dynamically and I'm not sure what it's expecting in the formats parameter, but I got my desired behaviour with just an empty array Hope this helps.

Answer 2

In Rails 5, the code is:

controller.send :_layout, ["some_string_here"]

I don't know why it needs a string in the array but that's what got it working for me. Our helper file looks as follows:

def current_layout
  layout = controller.send :_layout, ["test"]
  return layout.inspect.split("/").last.gsub(/.haml/,"")
end

Answer 3

You can add the following helper method in ApplicationHelper:

def current_layout
     (controller.send :_layout).inspect.split("/").last.gsub(/.html.erb/,"") 
end

And you can call it accordingly in set_meta_tags method. Something like,

  def set_meta_tags
    title = (current_layout != "application") ? "#{current_layout} ::" : false
    set_meta title: "#{layout} #{setting(:site, :title)}", description: setting(:site, :description)
  end

NOTE:

.inspect gives me the layout name with its relative path.

.split("/").last will remove the relative path and returns just the layout name(with extension).

.gsub(/.html.erb/) removes the extension part of layout. You may need to adjust the extension based on the template engine you are using e.g. In case of Haml use .html.haml.

---

My Solution

From a chat with Kirti, it seems that my forgetting to mention we had manually set out layout was a big deal. This will work if you manually set your layout:

#app/helpers/application_helper.rb
def current_layout
   self.send :_layout
end

def set_meta_tags
    title  = (current_layout != "application") ? "#{current_layout.titleize} :: " : ""
    set_meta title: title + setting(:site, :title), description: setting(:site, :description)
end