title: How to set defaut value for a many2one field in Odoo 9.0c?
body: <p>I have customized a module that include a many2one field. Now, I would like to set the default value for that field with the codition is: [[u'bom_ids', u'!=', False]]. i have tried below code but it did not work probebly</p>
  
  <pre><code>width_id = field.Many2one('sale.order.line.width', default ='_get_width_default')
  
  def _get_width_default(self, cr, uid, context=None): 
       res = self.pool.get('product.template').search(cr, uid, [(u'bom_ids', u'!=', False)], context=context)
       return res and res[0] or False
  
  
  default = {
  'width_id' : _get_width_default,
  }
  </code></pre>
  
  <p>Could you guy please help me to point what is the problem and how to sovle the problem and finnally get my purpose. Thank for watching</p>