Hi,

I've 3 fields :

    'units': fields.float('Number of unities'),
    'price': fields.float('Price of an Unit),
    'total': fields.float('Total', readonly=True),

And a view like this :

    <field name="units" nolabel="1" on_change="onchange_calculate()"/>
    <field name="price" nolabel="1" on_change="onchange_calculate()"/>
    <field name="total" nolabel="1"/>

I need on change of units or price, calculate the Total,

    def onchange_calculate(self, cr, uid, ids, context=None):
        return {'value': {'total': self.units + self.price}}

but didn't work :(

Help please ?