models.load_models({

    model: 'stock.production.lot',
    fields: ['id','name','product_id','total_qty','life_date'],
    domain: function(self){ //done


    loaded: function(self,list_lot){

        self.list_lot = list_lot;

    },
});

var PackLotLinePopupWidget = PopupWidget.extend({
    template: 'PackLotLinePopupWidget',
    events: _.extend({}, PopupWidget.prototype.events, {
        'click .remove-lot': 'remove_lot',
        'keydown': 'add_lot',
        'blur .packlot-line-input': 'lose_input_focus'
    }),

        show: function(options){
            var self = this;
            var product_lot = [];
            var lot_list = self.pos.list_lot;

            for(var i=0;i<lot_list.length;i++){
                if(lot_list[i].product_id[0] == options.pack_lot_lines.order_line.product.id){
                    product_lot.push(lot_list[i]);
                }
            }
            options.product_lot = product_lot;
            this._super(options);
            this.focus();
        },

​