title: odoo: error creating new form view : Field(s) `arch` failed against a constraint: Invalid view definition
body: <p>I want to create new form view associated to new data model, I create a new menu item "menu1" that has a submenu "menus" and then, I want to customize the action view. This is my code: </p>
  
  <p><strong>My xml file:</strong></p>
  
  <p><strong>My data model:</strong></p>
  
  <pre class="lang-python prettyprint-override"><code>from openerp.osv import fields, osv
  
  class hr_cutomization(osv.osv):
  
  _inherit = "hr.employee"
  
  _columns = {
    'new_field_ID': fields.char('new filed ID',size=11)
  }
  
  _default={
    'new_field_ID':0
  }
  
  hr_cutomization()
  
  class hr_newmodel(osv.osv):
  
  _name = "hr.newmodel"
  
  _columns = {
    'field1': fields.char('new filed1',size=11),
    'field2': fields.char('new filed2',size=11)
  }
  
  _default={
    'field1':0
  }
  
  hr_newmodel()
  </code></pre>
  
  <p>When I update my module, I got this error:</p>
  
  <blockquote>
    <p>ParseError: "ValidateError 
    Field(s) <code>arch</code> failed against a constraint: Invalid view definition
    Error details:
    Element '</p>
  </blockquote>
  
  <p>what's doing wrong in my code ?</p>