title: How to Update the Record in Wizard?
body: <p>I am using Odoo v12, I have one requirement to update the qty in wizard view. I have added two button Plus and Minus and but there is an issue with the update qty related. qty, it is not increasing <a href="https://i.stack.imgur.com/ryIdX.png" rel="nofollow noreferrer">Here the image the Plus and Minus qty related</a>. </p>
  
  <pre><code>@api.multi
  def action_plus(self):
      for record in self:
          record.qty  = record.qty + 1
      return {"type": "set_scrollTop"}
  </code></pre>