This is my code:

<form action="/ViewOrder" method="post" data-success_page="/thanks" class="s_website_form form-horizontal container-fluid mt32" >

                                 <input type="hidden" name="custmr" t-att-value="custmr" />

                                 <input type="hidden" name="records" t-att-value="records" />

                                <button class="btn btn-primary" name="order"  t-att-href="'/web#return_label=Website&amp;model=sale.order&amp;id=%s&amp;view_type=form' % (order_id)">View Order</button>

</form>

the order_id , I just returned it's value from the controller.

expected output: it will go to the order form 

current output : it just refresh

I would really appreciate your help. Thank you.