contract/agreement/models/account.py

# Copyright (C) 2018 - TODAY, Open Source Integrators
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).

from odoo import fields, models


class AccountAnalyticLine(models.Model):
    _inherit = 'account.analytic.line'

    agreement_id = fields.Many2one('agreement', string='Agreement')