Hi,

Thanks to 

I needed this trick in odoo v8, so here is my version :

    class ProductProduct(models.Model):

      _inherit = 'product.product' 

      @api.model

      def create(self, data, context=None):

        """ add a default orderpoint line to every new product """

        product = super(ProductProduct, self).create(data, context=context)

        # apply same domain rule as the one of button "Règles de réassort" of the odoo-web interface

        if product.product_tmpl_id.type != 'service':

            # add automatically the orderpoint (règle d'approvisionnement)

            vals = {

               'product_id': product.id,

               'product_min_qty': 0,

               'product_max_qty': 0,

               'qty_multiple': 1,

            }

            # desperatly a call with old api way but I didn't succeded to do this with the new api way

            self.pool.get('stock.warehouse.orderpoint').create(self._cr, self._uid, vals, context=context)

        return product

Now, I'd like to add a rule to check if the sub-record stock.warehouse.orderpoint is still there when there is an update (otherwize, the integrity is not fully checked)

I'm not exactly sure what you mean.

If what you're concerned about is defining minimum quantities for purchases: - go to the product form => procurements tab. In the Suppliers section, you can define a minimal order quantity for a given supplier (you need to activate "Manage pricelist per supplier" in the purchase settings first).

Hope this will help you:

go to product card and open page Procurements and in section Suppliers make new entry with minimal quantity.