I added two field in the wizard column, like this :

in .py

division = fields.Selection([('Unit','Unit'),('Sparepart','Sparepart'),('Umum','Umum')], 'Division')

chassis_number = fields.Char('Chassis Number')

in .xml

<field name="division"/>

<field name="chassis_number" attrs="{'invisible': [('division','!=','Unit')]}"/>

I need to hide chassis_number field when division is not Unit. And I tried the code like above, but it doesn't work. The effect so as read only. Is there anyone have solution?