title: Spree Products for a particular store in single application integration using spree-multi-domain
body: <p>I have an existing rails application with Gemfile having gems like below.</p>
  
  <pre><code>source 'https://rubygems.org'
  ruby '2.4.1'
  
  gem 'rails', '~&gt; 5.2.2'
  gem 'pg', '~&gt; 0.18'
  gem 'puma', '~&gt; 3.7'
  gem 'sass-rails', '~&gt; 5.0'
  gem 'uglifier', '&gt;= 1.3.0'
  gem 'coffee-rails', '~&gt; 4.2'
  gem 'turbolinks', '~&gt; 5'
  gem 'jbuilder', '~&gt; 2.5'
  gem 'jquery-rails'
  gem 'jquery-ui-rails'
  gem 'jquery-validation-rails'
  gem 'devise'
  gem 'toastr-rails'
  gem 'rails_admin'
  
  gem 'spree', '~&gt; 3.7.0'
  gem 'spree_multi_domain', github: 'spree-contrib/spree-multi-domain', branch: 'tracker-fix-3-5'
  </code></pre>
  
  <p>But after adding spree gems into my rails application, and running spree installation commands, I have started receiving errors like this:</p>
  
  <p><code>Undefined variable: "$navbar-height".</code></p>
  
  <p>Below is my css file sample already being used in the application.</p>
  
  <pre><code>/*
   *= require jquery-ui
   *= require_self
   *= require toastr
   *= require bootstrap
   *= require font-awesome
   *= require style
   *= require _all-skins
   *= require slideshow
   *= require custom
   */
  </code></pre>
  
  <p>I even tried to remove bootstrap from my css file and added lines like below:</p>
  
  <pre><code> *= require spree/frontend/all
   *= require spree/backend/all
  </code></pre>
  
  <p>But nothing worked.</p>
  
  <p>Is there any example code where I can get reference of setting up spree in such a way to have multiple stores using their own domains but in a single application to get their data stored?</p>