contract/agreement_legal_sale/models/agreement.py

# Copyright (C) 2019 - TODAY, Open Source Integrators
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).

from odoo import fields, models


class Agreement(models.Model):
    _inherit = 'agreement'

    sale_id = fields.Many2one('sale.order', string='Sales Order')
    analytic_account_id = fields.Many2one(
        'account.analytic.account', 'Analytic Account', readonly=True,
        copy=False)


class AgreementLine(models.Model):
    _inherit = "agreement.line"

    sale_line_id = fields.Many2one('sale.order.line',
                                   string='Sales Order Line')