contract/agreement_maintenance/models/maintenance_equipment.py

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

from odoo import fields, models


class MaintenanceEquipment(models.Model):
    _inherit = 'maintenance.equipment'

    agreement_id = fields.Many2one('agreement', string='Agreement')
    serviceprofile_ids = fields.One2many(
        'agreement.serviceprofile', 'equipment_id', string='Service Profiles')