Hi,

You can add a button and bind it with the python method using JS.

Ex:

Create an XML (button_template.xml) file under "/static/src/xml" and add following code:

<t t-name="my_custom_button">
    <button class="btn btn-primary btn-sm o_tree_custom_button" type="button">My Button</button>
</t>

Add above file in "__manifest__.py" in qweb section:

'qweb': [   
    'static/src/xml/*.xml',
]

Now, create a JS file under "/static/src/js (button_render.js)" and register this JS in web asset:

<template id="button_render_js" inherit_id="web.assets_backend">
    <xpath expr="." position="inside">
        <script type="text/javascript" src="/my_module/static/src/js/button_render.js"/>
    </xpath>
</template>

Now, add following code in your JS file:

odoo.define('my_custom_module.my_custom_button', function (require) {
"use strict";

var core = require('web.core');
var ajax = require('web.ajax');
var ListView = require('web.ListView');
var Dialog = require('web.Dialog');
var web_client = require('web.web_client');

var _t = core._t;
var _lt = core._lt;
var QWeb = core.qweb;

ListView.include({
    render_buttons: function($node) {
        this._super($node)
        var self = this;
        if (this.$buttons && this.model == 'sale.order') {
            this.$GetIdsbutton = $(QWeb.render("my_custom_button", {'widget': this}));
            this.$GetIdsbutton.appendTo(this.$buttons);
            $(this.$buttons).find('.o_tree_custom_button').on('click', function() {
                // Following route / method will be called when button is clicked
                ajax.jsonRpc('/web/my_custom_method', 'call', {}).done(function() {
                    self.reload_content()
                })
            });
        }
    },
})
});

Now, create a controller file (controllers/main.py) and add a route method using "/web/my_custom_method"

# -*- coding: utf-8 -*-
from odoo import http
from odoo.http import request

class CustomController(http.Controller):

    @http.route('/web/my_custom_method', type='http', method='POST',
                auth='user', csrf=False)
    def custom_method(self, **kw):
        # Your code goes here
        return True

Hope this will help you.

Let me know for any guidance.

Sudhir Arya
ERP Harbor Consulting Services
Skype:	sudhir@erpharbor.com
Website:	http://www.erpharbor.com