如何在调用odoo 12中的操作按钮时保持向导在后台打开

# models.py

from odoo import models, fields, api

class MyModel(models.Model):
    _name = 'my.model'

    @api.multi
    def open_wizard(self):
        action = {
            'type': 'ir.actions.act_window',
            'res_model': 'my.wizard',
            'view_mode': 'form',
            'target': 'new',
        }
        return action

# views.xml

<odoo>
    <data>
        <record id="view_my_wizard_form" model="ir.ui.view">
            <field name="name">my.wizard.form</field>
            <field name="model">my.wizard</field>
            <field name="arch" type="xml">
                <form>
                    <!-- Define wizard layout and fields here -->
                </form>
            </field>
        </record>
    </data>
</odoo>

# my_module.xml

<odoo>
    <data>
        <record model="ir.ui.view" id="view_my_model_form">
            <field name="name">my.model.form</field>
            <field name="model">my.model</field>
            <field name="arch" type="xml">
                <form>
                    <!-- Define model form layout and fields here -->
                    <header>
                        <button name="open_wizard" type="object" string="Open Wizard" attrs="{'invisible': [('state', '=', 'draft')]}"/>
                    </header>
                </form>
            </field>
        </record>
    </data>
</odoo>