cooperative-market/beesdoo_base/wizard/portal_wizard.py

from odoo import models, fields, api
from odoo import SUPERUSER_ID

class BeesdooWizard(models.TransientModel):

    _inherit = 'portal.wizard'

    @api.onchange('portal_id')
    def onchange_portal(self):
        # for each partner, determine corresponding portal.wizard.user records
        res_partner = self.env['res.partner']
        partner_ids = self._context.get('active_ids', [])

        contact_ids = set()
        for partner in res_partner.browse(partner_ids):
            for contact in (partner.child_ids | partner):
                # make sure that each contact appears at most once in the list
                if contact.id not in contact_ids:
                    contact_ids.add(contact.id)
                    in_portal = self.portal_id in contact.user_ids.mapped('groups_id')
                    self.user_ids |= self.env['portal.wizard.user'].new({
                        'partner_id': contact.id,
                        'email': contact.email,
                        'in_portal': in_portal,
                    })