title: creating two different fields(in object) for one field in object(in UI)
body: <p>i have a object <code>details</code> in which <code>dueAmount</code> and <code>adjustedAmount</code> are two fields. So my object looks like below.</p>
  
  <pre><code>{dueAmount:1000,adjustedAmount:1000}
  </code></pre>
  
  <p>Now if the value is changed from 1000 to 1500, then it should be as below.</p>
  
  <pre><code>{dueAmount:1000,adjustedAmount:1500}
  </code></pre>
  
  <p>Means <code>dueAmount</code> should hold previous value and <code>adjustedAmount</code> should hold changed value.
  <strong>Note</strong>: In <code>UI</code>, there is only one field i.e. one <code>ng-model</code>.</p>