product_curve_pricelist/models/product_pricelist_item.py

# -*- encoding: utf-8 -*-

import logging
from openerp import models, fields, api, _

_logger = logging.getLogger(__name__)

class ProductPricelistItem(models.Model):
    _inherit = "product.pricelist.item"

    product_curve_id = fields.Many2one(comodel_name="product.curve", string="Curve")