default_get called twice

[David Lefever @ Taktik]

Hello,

in the web client, default_get of a wizard is called multiple times (twice).

Is it normal?

Thank you,
David Lefever.

[Mohammed Shekha(Open ERP) (msh-openerp)]

Hello,

This has been fixed and merged with lp:~openerp-dev/openobject-client-web/6.0-opw-574014-cpa.

Revsion No. 4846.

Thanks.

[Alexis de Lattre (alexis-via)]

This issue is also present in OpenERP 6.1 with both the Gtk client and the Web interface (tested with Firefox).

[Alexis de Lattre (alexis-via)]

Here is a more accurate description of the problem :

I have several fields attached to an osv_memory wizard. I have defined a default_get function that sets the default value for these fields.

When I launch the Wizard, the default_get function is called and the fields of my wizard get a value. Then, I click on one of the buttons of the wizard : in the function called by the button, I do a self.read(cr, uid, ids[0], [fields], context=context) to read the fields of my wizard -> the default_get function is called a second time.

[Alexis de Lattre (alexis-via)]

After some more investigation, I found out that it's NOT the "self.read" in the code of the button that triggers the second call to default_get.

When you click on a button of the wizard, the OpenERP framework calls the self.create() method, who is responsible for the second call to default_get. It does that because i have some readonly fields in the wizard that are set by default_get() ; as these fields are readonly, they are not passed to create(), so the framework calls default_get() to get the values for these readonly fields.

The big mess with readonly fields not passed to create() nor write() is a well known problem of the OpenERP framework, cf https://bugs.launchpad.net/openobject-client/+bug/378824

[jordg (gbj)]

This has been purplexing me also
For a work arround:

Create 2 columns. One the real variable and the other the display variable.
Make the real column invisble and the display column readonly.
Pass the real column to some_onchange(product_id, real_column) and return real and display columns
In your action code called after OK button you can access your real_column in your object.

For example
Decalre 2 columns. In this case date.

        'date': fields.datetime('Issue Date', help="Date of Issue"),
        'date_d': fields.dummy(string='Issue Date', type='datetime', help="Date of Issue"),

Set defaults via _defaults or default_get()
        'date': lambda *a: time.strftime('%Y-%m-%d %H:%M:%S'),

In your view create 'date' invisible and 'date_d' readonly
Pass date to some onchange function
        <field name="date" invisible="1"/>
        <field name="date_d" readonly="1"/>
        <field name="product_id" colspan="6" default_focus="1" on_change="onchange_product_id(product_id, date)"/>

In your onchange return date and date_d:
def onchange_product_id(self, cr, uid, ids, product_id, date):
        ...
        return { 'value':{
            'product_uom':product['uom_id'][0],
            'soh':product['qty_available'],
            'date':date,
            'date_d':date,
            'name':name,
        }}

When you press OK call some action. Here your 'date' is the correct value
def my_action(self, cr, uid, ids, context=None):
        o = self.browse(cr, uid, ids[0], context=context)
        date = o.date