hi,

I want to open a wizard, a new form when I click on this button in my purchase.order tree view:

  My Code looks like this: 

<button name="this_test" string="test Button" type="object"/> 

        <record id="purchase_order_addon_form" model="ir.ui.view">
            <field name="name">purchase.order.addon.form</field>
            <field name="model">purchase.order</field>
            <field name="arch" type="xml">
                <form string="testing">
                <sheet>
                    <div class="oe_title">
                        <h1>
                            <!--<field name="name" readonly="1"/>-->
                        </h1>
                    </div> 
                </sheet>
                </form>
            </field>
        </record>

    @api.multi
    def this_test(self):
    	view_id = self.env.ref('my_module.purchase_order_addon_form').id
    	context = self._context.copy()
    	return {
            'name':'test123',
            'view_type':'form',
            'view_mode':'form',
            'views' : [(view_id,'form')],
            'res_model':'purchase.order',
            'view_id':view_id,
            'type':'ir.actions.act_window',
            'res_id':self.id,
            'target':'new',
            'context':context,
        }

Now when I click the button, the wizard popups with my designed xml view.

My problem is, when I click not on the button, but on the record, the same view is called, and I don't understand why...

Do I need a new model for that, or is that another way to handle this issue?

Thank you