bemade-addons/bemade_sports_clinic/models/res_partner.py

from odoo import models, fields, api, _
from odoo.exceptions import UserError
from odoo.exceptions import ValidationError


class Partner(models.Model):
    _inherit = 'res.partner'

    owned_team_ids = fields.One2many(comodel_name='sports.team',
                                     inverse_name='parent_id')
    staff_ids = fields.One2many(comodel_name='sports.team.staff',
                                inverse_name='team_id')
    team_staff_rel_ids = fields.One2many(comodel_name='sports.team.staff',
                                         inverse_name='partner_id',
                                         string='Teams Served',
                                         help='The teams this person works for.')
    teams_served_ids = fields.One2many(comodel_name='sports.team', compute='_compute_teams_served')
    patient_ids = fields.One2many(comodel_name='sports.patient', inverse_name='partner_id')

    def write(self, vals):
        if self.patient_ids and 'name' in vals:
            raise ValidationError(_("To change a patient's name, change it from the patient form."))
        return super().write(vals)

    @api.depends('team_staff_rel_ids.team_id')
    def _compute_teams_served(self):
        for rec in self:
            rec.teams_served_ids = rec.team_staff_rel_ids.mapped('team_id')