Hello, I'm on Odoo v8,

I've done a module, it inherit from stock.move, I try to overload action_assign.

Here I've put a breakpoint (pdb) to see my values. When I try to get the product of a move, i got this error :

AttributeError: 'stock.move' object has no attribute '_ids'

My code :

# -*- coding: utf-8 -*-
from openerp.osv import osv, fields, expression

class stock_move(osv.osv):
    _inherit = "stock.move"

    def action_assign(self, cr, uid, ids, context):
        import pdb
        pdb.set_trace()

        #récupérer le produit
        product_id = self.product_id

What's wrong ?