Try fb from override and generated page

app/views/shared/render_share.html.erb

@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+	<meta property="og:title" content="<%= @object.title %>" /> 
+	<meta property="og:description" content="<%= @object.subtitle %>" /> 
+	<meta property="og:url" content="<%= @orig_url %>" /> 
+	<meta property="og:image" content="<%= 'http://' + request.env['HTTP_HOST'] + @object.image.url %>" />
+</head>
+<body>
+</body>
+</html>