Hello everybody,

I want to replace a field in a XML record, but obviously, what I tried doesn't seem to be the good way to do it ... here's my record:

<record model="ir.actions.act_window" id="open_allocation_holidays">

<field name="name">Allocation Requests</field>

<field name="res_model">hr.holidays</field>

<field name="view_type">form</field>

<field name="context">{'default_type':'add', 'search_default_my_leaves':1}</field>

<field name="domain">[('type','=','add')]</field>

<field name="view_id" ref="allocation_leave_new"/>

<field name="search_view_id" ref="view_hr_holidays_filter"/>

</record>

What I want is to replace the field to add a default filter.

<field name="context">{'default_type':'add', 'search_default_my_leaves':1}</field>

with:

<field name="context">{'default_type':'add', 'search_default_my_leaves':1, 'search_default_my_validations':1}</field>

I already tried xpath with position="attributes" and position="replace,

<xpath expr="//record[@id='open_allocation_holidays' ]" position="attributes"> <attribute name="context"> {default type ...}</attribute></xpath>, I tried to search with the field name too (expr="//field[@name='context']") but nothing works.
Is there an other way to replace my field ?