from odoo import api, fields, models, _


class EventRegistrationAnswer(models.Model):
    _inherit = "event.registration.answer"

    extra_product_ids = fields.One2many(related="value_answer_id.extra_product_ids")
    sale_order_line_ids = fields.Many2many(
        comodel_name="sale.order.line",
        column1="event_answer_id",
        column2="sale_order_line_id",
        relation="event_answer_sale_order_line_rel",
        string="Related sale order lines",
    )