title: change type of field in odoo
body: <p>Hy guys,
  I want to ask something.</p>
  
  <p>Well there's a field in base which is like this :</p>
  
  <pre><code>_name = "stock.location"
  
  _columns = 
  {
    'complete_name': fields.function(_complete_name, type='char',string="Full Location Name", store={'stock.location': (_get_sublocations, ['name', 'location_id', 'active'], 10)}),
  }
  </code></pre>
  
  <p>and i wanted to change the complete_name field type to Char in my wizard with my own custome model named : "compute.location.wizard", how do i do that?</p>