I have a tree view to show logs, but this logs come from a third party solution. I created a transient model to hold the logs. I compute the logs on the fly but the tree is not get populated with the data, nor is the database been updated. 

class VehicleLogs(models.TransientModel):
    _name = 'vehicle.logs'
    name = fields.Char()
    timestamp = fields.Datetime()
    speed = fields.Integer()
    over_speed = fields.Boolean()
    power_wire = fields.Boolean()
    signal_wire = fields.Boolean()
    vehicle_id = fields.Many2one('vehicle')

class Vehicles(models.Model):
    _inherit = 'vehicle'
    vehicle_log_ids = fields.One2many('vehicle.logs', 'vehicle_id', compute='_compute_vehicle_logs')

    def format_data(self, data):
        res = []
        data = data[0][:1]
        for _ in data:
            vals = {'name': _['device_timestamp'], 'speed': int(_['speed']),
                    'over_speed': True if int(_['speed']) > 84 else False,
                    'power_wire': _['p_wire'],
                    'vehicle_id': self.id,
                    'signal_wire': _['s_wire']}
            res.append((0, 0, vals))
        return res

    @api.multi
    def _compute_vehicle_logs(self):
        for vehicle in self:
            traccar_id = vehicle.traccar_id
            _from = (datetime.datetime.now() - datetime.timedelta(hours=1))
            _to = datetime.datetime.now()
            _from = (datetime.datetime.now() - datetime.timedelta(hours=6))

            base_url = self.vendor_id.traccar_url
            traccar_username = self.vendor_id.traccar_username
            traccar_password = self.vendor_id.traccar_password

            res = self.env['report.device_reports.device_report'].get_traccar_positions(base_url, traccar_username,
                                                                                        traccar_password, traccar_id,
                                                                                        _from,
                                                                                        _to)
            values = self.format_data(res)
            vehicle.vehicle_log_ids = values




 <record model="ir.ui.view" id="view_vehicle_form_ext">
 <field name="name">vehicle.form.ext</field>
 <field name="model">vehicle</field>
 <field name="inherit_id" ref="vehicles.view_vehicle_form"/>
            <field name="arch" type="xml">
                <xpath expr="//notebook" position="inside">
                    <page string="Device Logs" autofocus="autofocus">
                        <field name="vehicle_log_ids">
                            <tree default_order="timestamp desc">
                                <field name="timestamp"/>
                                <field name="speed"/>
                                <field name="over_speed"/>
                                <field name="power_wire"/>
                                <field name="signal_wire"/>
                            </tree>
                        </field>
                    </page>
                </xpath>
            </field>
        </record>