title: *ngFor resetting all form values when adding new input element
body: <p>I have an Angular2 app with a button that can add another loan to my loans. My *ngFor is pretty simple also:</p>
  
  <pre><code>    &lt;div *ngFor="let loan of myLoans"&gt;
        &lt;label&gt;{{loan.name}}&lt;/label&gt;
        &lt;input type="text" name="loan.name" [(ngModel)]="loan.amount"&gt;
      &lt;/div&gt;
  </code></pre>
  
  <p><code>myLoans</code> is an array of Loan objects with <code>name</code> and <code>amount</code> parameters. My button is also very simple.</p>
  
  <pre><code>&lt;button id="addLoan" type="button" (click)="addLoan()"&gt;Legg til lån&lt;/button&gt;
  </code></pre>
  
  <p>The addLoan() function:</p>
  
  <pre><code>addLoan(): void{
      var newLoan = new Loan();
      this.myLoans.push(newLoan);
  }
  </code></pre>
  
  <p>My problem is that when I add a new loan in the list, whatever value I had in the input field for my other loans goes back to 0 or whatever value I set in the constructor for the loan object. </p>
  
  <p><strong>Loading the app shows this picture</strong></p>
  
  <p><a href="https://i.stack.imgur.com/V989k.png" rel="noreferrer"><img src="https://i.stack.imgur.com/V989k.png" alt="What now"></a></p>
  
  <p><strong>ngModel is working when typing in a number</strong></p>
  
  <p><a href="https://i.stack.imgur.com/3I6qw.png" rel="noreferrer"><img src="https://i.stack.imgur.com/3I6qw.png" alt="enter image description here"></a></p>
  
  <p><strong>After pressing the "Legg til lån" button, the value of the first input is reset</strong></p>
  
  <p><a href="https://i.stack.imgur.com/Ptexu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Ptexu.png" alt="enter image description here"></a></p>
  
  <p><strong>ngModel is still working for the first input if I try putting in another number</strong></p>
  
  <p><a href="https://i.stack.imgur.com/Kkdye.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Kkdye.png" alt="enter image description here"></a></p>
  
  <p>Anyone have an idea what is happening here?</p>