Multitenant

app_controllers_multtenant_behaviors.rb

module MultitenantBehaviors
  protected
  def current_company
    if request.subdomain && request.subdomain != 'www'
      # assumes a `subdomain` string field on the Company class / table
      @current_company ||= Company.find_by(subdomain: request.subdomain)
    else
      nil
    end
  end
end

app_controllers_widgets_controller.rb

class WidgetsController < ApplicationController
  include MultitenantBehaviors
  
  def index
    if current_company
      #assumes an association between Company objects and Widget objects
      @widgets = current_company.widgets
    else
      @widgets = Widget.all
    end
  end
end