I want to post the select abo value -> to my product.create method.

I have this in my xml:

<div class="form-group col-lg-6">
    <label class="control-label" for="product.text">Informationstext:</label>
    <input type="text" name="text" class="form-control" t-att-value="text"/>
</div>
<div t-attf-class="form-group col-lg-6">
    <label class="control-label" for="abonnement">Abonnement:</label>
    <select name="abonnement" class="form-control">
        <option value="">Abo...</option>
        <t t-foreach="abonnements" t-as="abo">
            <option t-att-value="abo.name" domain="[('abo.is_abo', '=',True)]">
                <t t-esc="abo.name" />
            </option>
        </t>
    </select>
</div>

Now I can give with product.create the text to my field in product, but the select "abonnement" isn't working.

How can I give that value to my create function?

controller:

@http.route(['/my/inserat/new'], type='http', auth="user", website=True)
def inserat_creation(self, product=None, redirect=None, **post):
    product = request.env['product.template'].browse([product])
    try:
        product.check_access_rights('read')
        product.check_access_rule('read')
    except AccessError:
            return request.website.render("website.403")
    values = {
        'error': {},
        'error_message': [],
         }

    if post:
         #the select from the xml should give here the selection to the field abonnement in product.template
        product_id = product.create({'text': post.pop('text')})

        product.sudo().write(post)
        values.update(post)

        request.website.sale_get_order(force_create=1)._cart_update(product_id=int(product_id), add_qty=1, set_qty=0)
        return request.redirect("/shop/cart")

    abonnements = request.env['product.template'].sudo().search([('is_abo','=',True)])

    values.update({
        'product': product,
        'abonnements': abonnements,
    #    'redirect': redirect,
    })

    return request.website.render("website_portal_sale.inserat_creation", {
        'product': product.sudo(),
        'abonnements': abonnements,
    })

Thank you