title: Extjs hasone association
body: <p>I have Person model, it contains id, first_name, last_name etc and <strong>merital_id</strong> field. I also have Merital model contains only 2 field: id and title.
  Server responses JSON like:</p>
  
  <pre><code>{
      success: true,
      items: [
          {
              "id":"17",
              "last_name":"Smith",
              "first_name":"John",
              ...
              "marital_id":1,
              "marital": {
                  "id":1,
                  "title":"Female"
              }
          },
          ...
      ]
  }
  </code></pre>
  
  <p>So how can I connect my models with association? I still can use record.raw.merital.title in my column.renderer, but I cannot use such fields in templates like {last_name} {first_name} ({merital.title}).
  What king of association do I need to use, I tryed belongsTo, but when I try to use record.getMarital() I get an error "no such method on record".</p>
  
  <p>I use extjs 4</p>