Controller redirect to different paths depending on previous page

Question:

How I want to redirect to different path after create action, given if previous_page is ../reader/new goes to ../reader/blog/:id, whereas if previous_page is ../editor/new goes to ../editor/blog/:id.

Explaination:

I want to modify the controller actions so that it can redirect to different path depending on which page it comes from. For example, I have a reader, editor and blog model. Both reader and editor can create a blog.

Here is the original blogs_controller:

    class BlogsController < ApplicationsController        
      def create
        @blog = Blog.new(blog_params)
        respond_to do |format|
          if @blog.save
            format.html { redirect_to @blog }
          else
            format.html { render :new }
          end
        end
      end

      private

      def blog_params
        params.require(:service).permit(:title, :content)
      end
    end