<field name="factor"
digits="[42,5]"
attrs="{'invisible':[('uom_type','!=','smaller')],
- 'readonly':[('uom_type','!=','smaller')]}"/>
+ 'readonly':[('uom_type','=','bigger')]}"/>
<field name="factor_inv"
digits="[42,5]"
attrs="{'invisible':[('uom_type','!=','bigger')],