title: Scrapy get data from mongodb in the spider
body: <p>I have created a <code>spider</code> which scrape the websites <code>products</code> from the listing page.
  Is there any way in which i can connect to <code>mongodb</code> in my <code>spider</code>. Get the list of <code>urls</code> which are stored and scrape those url's</p>
  
  <p>Thanks..</p>