problem description

I intend to customize the excel download in odoo, but I can only add the "Export excle" option successfully under the form attempt. The tree view does not have this option
form view

tree

Code:

view.xml

<act_window id="action_export_wizard"
            name="Excel"
            src_model="split.accountant.total"
            res_model="export.wizard"
            view_type="tree" view_mode="form"
            target="new"/>

<record id="wizard_view" model="ir.ui.view">
    <field name="name">export wizard</field>
    <field name="model">export.wizard</field>
    <field name="arch" type="xml">
        <form string="">
            <footer>
                <button string="" class="btn-primary" name="action_export" type="object"/>
                <button string="" class="btn-default" special="cancel" />
            </footer>
        </form>
    </field>
</record>

model.py

class ExportWizard(models.Model):
    _name = "export.wizard"

    file = fields.Binary("")

    def generate_excel(self, product_ids):
        """
        excel
        """
        workbook = xlwt.Workbook(encoding="utf-8")
        worksheet = workbook.add_sheet("")

        -sharp add header
        header = ["", "", ""]
        for col in range(len(header)):
            worksheet.write(0, col, header[col])

        -sharp add data
        for row in range(1, len(product_ids)+1):
            product_id = product_ids[row-1]
            worksheet.write(row, 0, product_id.company_name)
            worksheet.write(row, 1, product_id.accountant_num)
            worksheet.write(row, 2, product_id.accountant_total)

        -sharp save
        buffer = BytesIO()
        workbook.save(buffer)
        return base64.encodebytes(buffer.getvalue())

    @api.multi
    def action_export(self):
        context = dict(self._context or {})
        print("context=",context)
        active_ids = context.get("active_ids", []) or []
        print("active_ids=", active_ids)
        product_tmpl_ids = self.env["split.accountant.total"].search([("id", "in", active_ids)])
        self.file = self.generate_excel(product_tmpl_ids)

        value = dict(
            type="ir.actions.act_url",
            target="new",
            url="/web/content?model=%s&id=%s&field=file&download=true&filename=accountant.xls" % (self._name, self.id),
        )
        return value