when i want to send my form the file can not be saved in the database i know how to proceed with the files and how i can get it and show it in the back thank you very much here is my code

<?xml version="1.0" encoding="utf-8"?>
<odoo>
<data>
<template id="add">
<title>Services</title>
<t t-call="website.layout">
<t t-set="additional_title">Services</t>
<div id="wrap">
<div class="oe_structure"/>
<div class="container">
<h1>Nous Sommes Votre réference d'aide</h1>
<div class="row">
<div class="col-md-8">
<div class="oe_structure">
<div>
<p>Nous serons bien augré de vos attentes.</p>
<p>We'll do our best to get back to you as soon as possible.</p>
</div>
</div>
<section id="forms">
<form method="post" class="s_website_form container-fluid form-horizontal"
action="/website/form/" data-model_name="association.service"
data-success_page="/page/services/add.thankyou"
enctype="multipart/form-data">
<!-- Description text field, required -->
<div class="form-group form-field">
<label class="col-md-3 col-sm-4 control-label" for="titre">Titre
</label>
<div class="col-md-7 col-sm-8">
<input type="text" class="form-control o_website_form_input"
name="titre"
t-att-value="request.params.get('titre', '')" required=""/>
</div>
</div>
<div class="form-group form-field o_website_form_required_custom">
<label class="col-md-3 col-sm-4 control-label" for="num_benifier">Phone
Number
</label>
<div class="col-md-7 col-sm-8">
<input type="text" class="form-control o_website_form_input"
name="num_benifier"
t-att-value="request.params.get('num_benifier', '')"
required=""/>
</div>
</div>
<div class="form-group form-field o_website_form_required_custom">
<label class="col-md-3 col-sm-4 control-label" for="email">Email
</label>
<div class="col-md-7 col-sm-8">
<input type="text" class="form-control o_website_form_input"
name="email"
required="" t-att-value="request.params.get('email', '')"/>
</div>
</div>


<div class="form-group form-field o_website_form_required_custom">
<label class="col-md-3 col-sm-4 control-label" for="description">
Description
</label>
<div class="col-md-7 col-sm-8">
<textarea class="form-control o_website_form_input" name="description"
required="">

<t t-esc="request.params.get('description', '')"/>
</textarea>
</div>
</div>
<div class="form-group form-field o_website_form_required">
<label class="col-md-3 col-sm-4 control-label" for="partner_name">Votre Nom
:
</label>
<div class="col-md-7 col-sm-8">
<input type="text" class="form-control o_website_form_input"
name="partner_name" required=""
t-att-value="request.params.get('partner_name', '')"/>
</div>
</div>

<div class="form-group">
<div class="col-md-offset-3 col-sm-offset-4 col-sm-8 col-md-7">
<span class="btn btn-primary btn-lg o_website_form_send">Envoyer</span>
<span id="o_website_form_result"></span>
</div>
</div>
</form>
</section>

</div>
<div class="col-md-4 mb32">
<t t-call="website.company_description"/>
</div>
</div>
</div>
</div>
</t>
</template>

<template id="thankyou">
<t t-call="website.layout">
<div id="wrap">
<div class="oe_structure">
<div class="container">
<h1>Thank you!</h1>
<p>
Your job application has been successfully registered,
we will get back to you soon.
</p>
</div>
<section class="oe_dark">
<div class="container">
<div class="row">
<div class="col-md-12 text-center mt16 mb16">
<a href="/" class="btn btn-primary btn-lg">Continue To Our Website</a>
</div>
</div>
</div>
</section>
</div>
</div>
</t>
</template>



</data>
</odoo>



 and my controlleur  :
from odoo import http

class Service_web(http.Controller):
@http.route('/page/services/add', auth='public', website=True)
def index(self, **kw):
Services = http.request.env['association.service'] # dans env on met nom de class
return http.request.render('website_service.add', { # nom de module avant index
'serv': Services.search([])
})