<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>


        <!-- View -->
        <record model="ir.ui.view" id="wizard_add_room_form_view">
            <field name="name">wizard.bbs_booking.add.room</field>
            <field name="model">bbs_booking.booking.room.wizard</field>
            <field name="arch" type="xml">
                <form string="Add a room to a booking">
                    <field name="booking_id" />
                    <field name="room_id" />
                    <button type="object" name="add_room_to_booking" string="Add a room"/>
                </form>
            </field>
        </record>

        <!-- Actions window -->
        <record model="ir.actions.act_window" id="wizard_add_room">
            <field name="name">Add a room</field>
            <field name="res_model">bbs_booking.booking.room.wizard</field>
            <field name="view_mode">form</field>
            <field name="target">new</field>
        </record>


    </data>
</openerp>
<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>


        <!-- View -->
        <record model="ir.ui.view" id="wizard_add_room_form_view">
            <field name="name">wizard.bbs_booking.add.room</field>
            <field name="model">bbs_booking.booking.room.wizard</field>
            <field name="arch" type="xml">
                <form string="Add a room to a booking">
                    <field name="booking_id" invisible="1"/>
                    <field name="room_id" />
                    <button type="object" name="add_room_to_booking" string="Add a room"/>
                </form>
            </field>
        </record>

        <!-- Actions window -->
        <record model="ir.actions.act_window" id="wizard_add_room">
            <field name="name">Add a room</field>
            <field name="res_model">bbs_booking.booking.room.wizard</field>
            <field name="view_mode">form</field>
            <field name="target">new</field>
        </record>


    </data>
</openerp>
Add a room wizard: Field booking_id is now invisible
Add a room wizard: Field booking_id is now invisible
