title: FB OG Product Object not displaying all fields?
body: <p>This is my first interaction with OG and I'm sure I am missing something simple. I have the following as a self hosted object:</p>
  
  <pre><code>&lt;meta property="fb:app_id" content="3...." /&gt;
  &lt;meta property="og:title" content="..." /&gt;
  &lt;meta property="og:image" content="https://.com/img/..." /&gt;
  &lt;meta property="og:url" content="https://.com/myobjectpage.html" /&gt;
  &lt;meta property="og:type" content="product" /&gt;
  &lt;meta property="product:product_link" content="https://.com/p/64/..." /&gt;
  &lt;meta property="og:description" content="This course...." /&gt;
  </code></pre>
  
  <p>Now everything is showing properly <strong>EXCEPT</strong> product:product_link it doesn't show anywhere. The debugger gives it a green light so not sure what is wrong.</p>
  
  <p>Any pointers / help would be greatly appreciated.</p>
  
  <p>JB</p>