odoo开发中@api.depends与@api.onchange的区别

    @api.onchange(‘product_uom_qty‘, ‘product_uom‘, ‘route_id‘)
    def _onchange_product_id_check_availability(self):
        if not self.product_id or not self.product_uom_qty or not self.product_uom:
            self.product_packaging = False
            return {}
        if self.product_id.type == ‘product‘:
            precision = self.env[‘decimal.precision‘].precision_get(‘Product Unit of Measure‘)
            product = self.product_id.with_context(
                warehouse=self.order_id.warehouse_id.id,
                lang=self.order_id.partner_id.lang or self.env.user.lang or ‘en_US‘
            )

class SaleOrderLine(models.Model):
    _inherit = ‘sale.order.line‘

    qty_delivered_method = fields.Selection(selection_add=[(‘stock_move‘, ‘Stock Moves‘)])
    product_packaging = fields.Many2one(‘product.packaging‘, string=‘Package‘, default=False)
    route_id = fields.Many2one(‘stock.location.route‘, string=‘Route‘, domain=[(‘sale_selectable‘, ‘=‘, True)], ondelete=‘restrict‘)
    move_ids = fields.One2many(‘stock.move‘, ‘sale_line_id‘, string=‘Stock Moves‘)

    @api.multi
    @api.depends(‘product_id‘)
    def _compute_qty_delivered_method(self):
        """ Stock module compute delivered qty for product [(‘type‘, ‘in‘, [‘consu‘, ‘product‘])]
            For SO line coming from expense, no picking should be generate: we don‘t manage stock for
            thoses lines, even if the product is a storable.
        """
        super(SaleOrderLine, self)._compute_qty_delivered_method()

        for line in self:
            if not line.is_expense and line.product_id.type in [‘consu‘, ‘product‘]:
                line.qty_delivered_method = ‘stock_move‘

    @api.multi
    @api.depends(‘move_ids.state‘, ‘move_ids.scrapped‘, ‘move_ids.product_uom_qty‘, ‘move_ids.product_uom‘)
    def _compute_qty_delivered(self):
        super(SaleOrderLine, self)._compute_qty_delivered()