I have created a button named 'Confirm' in customer invoice. When i click 'Confirm' button 'state1' will be 'confirmed'. I want to hide Validate button when 'state1'='draft' and show the Validate button when 'state1'='confirmed'. I tried below code but it is not working. Can anyone help me?
<!-- inherit account invoice form -->
<record id="invoice_form_inheritai" model="ir.ui.view">
<field name="name">account.invoice.form.inheritai</field>
<field name="model">account.invoice</field>
<field name="inherit_id" ref="account.invoice_form"/>
<field name="arch" type="xml">
<button name="invoice_print" position="after">
<field name="state1" invisible="1"/>
<button name="invoice_check" string="Confirm" type="object" attrs="{'invisible': [('state1','not in', ['draft'])]}" class="oe_highlight" groups="base.group_user"/>
</button>
<button name="invoice_open" position="replace">
<button name="invoice_open" state="draft" string="Validate" attrs="{'invisible': [('state1','!=', ['confirmed'])]}" groups="base.group_user"/>
</button>
</field>
</record>