title: How to set default value for fields in odoo 8?
body: <p>I created a checkbox and I want to set its default value to false so that it is unchecked by default.I tried in four ways but still the checkbox is checked by default.</p>
  
  <pre><code>raw = fields.Boolean(default=0)
  raw = fields.Boolean(default='0')
  raw = fields.Boolean(default=False)
  raw = fields.Boolean(default='False')
  </code></pre>