title: transactions not picking the date of the good reception
body: <p>I tried to make a good reception whose transactions get its date,but the good reception holds the date and when i click on all transactions the list view shows all the other info but the date is blank;any help plz</p>
  
  <pre><code>class goods_reception(models.Model):
          _name = "rcs.goods_reception"
  
  
          name = fields.Char(compute='compute_name')
          reference = fields.Char(string="Reference Document")
          warehouse = fields.Many2one("stock.warehouse", string="Prison", readonly="1")
          supplier = fields.Many2one("res.partner", string="Supplier", required=True)
          received_goods = fields.One2many("rcs.stock_transaction", "reception")
          received_by  = fields.Many2one("res.users", readonly=True)
          date = fields.Date(required=True)
          state = fields.Selection([
           ('pending', "Pending"),
           ('received', "Received"),
          ], default='pending', readonly=True)
  
  
          @api.one
          def compute_name(self):
  #check
                  self.name = "Reception No:"+str(self.id)+", Supplier:"+self.supplier.name+", Date:"+self.date
  
          @api.model
          def create(self, vals):
                  vals['received_by'] = self.env.user.id
                  vals['warehouse'] = self.env.user.warehouse.id
                  return super(goods_reception, self).create(vals)
  
          @api.one
          def action_pending(self):
                  self.state = 'pending'
  </code></pre>