Incorrect behavior of on_change for floats on web client

[Blqt]

Hi,

There is a different behavior for on_change between web client and gtk (gtk works fine):
Environment : 5.07 Windows AND linux

When on_change modifies a float field in a form, the field is rounded with 2 decimals using the web client .
On linux, the rounding is different, but false too.

Example:
This example divides weight by 3 when volume is changed on a product form
This example is simple and stupid, but this error prevents us from using web client for sale and purchase order with price_accuracy=3 (product_id_change returns price rounded with 2 digits)

     <record id="test_float_form_view" model="ir.ui.view">
            <field name="name">test.float.form</field>
            <field name="model">product.product</field>
            <field name="inherit_id" ref="product.product_normal_form_view"/>
            <field name="type">form</field>
            <field name="arch" type="xml">
                    <field name="volume" position="replace">
                           <field name="volume" on_change="onchange_volume(volume,weight)"/>
                    </field>
            </field>
        </record>

class product_product(osv.osv):
    _name = 'product.product'
    _inherit = 'product.product'
    def onchange_volume(self, cr, uid, ids,volume,weight):
        v = {}
        v['weight'] = weight/3
        return {'value': v}
product_product()

1) Create or edit a product
2) Enter weight = 1.000
3) Enter volume= whatever you want
4) on window weight becomes 0.33 where it should be 0.333. On linux, weight becomes 0 !!!
with gtk, everything is fine and weight is changed to 0.333

/Benoit

[Blqt (benoit-luquet)]

I have found a workaround by changing

class Float(Number):
    if_empty = False
    digit = 2
    ...
to
class Float(Number):
    if_empty = False
    digit = 5
    ...

in web/python/Lib/site-packages/openero_web.../openerp/validators/validators.py
Is it the right thing to do?

Benoit