title: How to pass a parameter to pathFor in Handlebars for Iron-Router with Meteorite?
body: <p>I have a simple route with a parameter:</p>
  
  <pre><code>this.route('article', {
          path: '/article/:_id',
          data: function() { return Articles.findOne(this.params._id); }
      });
  </code></pre>
  
  <p>I would like to have use the pathFor handlebars helper here with the _id:</p>
  
  <pre><code>{{#each articles}}
  &lt;li&gt;&lt;a href="{{pathFor 'article' _id}}"&gt;{{title}}&lt;/a&gt;&lt;/li&gt;
  {{/each}}
  </code></pre>
  
  <p>This doesnt work for passing the _id tag into the url though...</p>