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[Viktor Nagy <viktor.nagy@xxxxxxxxxxx>]

hi,

I have some custom product views where I would like to restrict the shown
categories using a domain attribute. The categories to be restricted for are
defined in xml, thus using ref and eval would do the work. But the following
does not work

        <record id="view_consumable_inherit_form" model="ir.ui.view">
            <field name="name">product.consumable.inherit</field>
            <field name="model">product.product</field>
            <field name="inherit_id" ref="view_consumable_form"/>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <data>
                    <xpath expr="//field[@name='categ_id']"
position="attributes">
                        <attribute name="domain">[('parent_id',
'=',ref('product_category_consumable'))]</attribute>
                    </xpath>
                </data>
            </field>
        </record>

neither does

                        <attribute name="domain" eval="'[(\'parent_id\',
\'=\','+str(ref('product_category_consumable'))+')]'"/>

with the latter the error is:
[2011-09-14 08:41:20,186][aperam]
ERROR:init:<string>:3:0:ERROR:RELAXNGV:RELAXNG_ERR_NOELEM: Expecting an
element , got nothing
[2011-09-14 08:41:20,186][aperam]
ERROR:init:<string>:3:0:ERROR:RELAXNGV:RELAXNG_ERR_INVALIDATTR: Invalid
attribute position for element xpath

so how do you add such a constraint to your views?