Hi there,

Am trying to inherit a <templates id="template" xml:space="preserve">, but no succedd in almost a full week. What was fun to learn, bcamed a nightmare, just bcause of this, so far.
I have done the following come (below). Can someone pleeeeaaassseee, have a look and let me know what am I doing wrong?

I want to inherit the SEO widget. to add a new field, but for a full week I couldn't touch that popup window. It's on odoo 12.

 So,

- I have added the js file (ad_jas.xml)

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <template id="inherit_seo" inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
            <script type="text/javascript" src="/fk_website_seo/static/js/extend_seo_widget.js"></script>
        </xpath>
    </template>
</odoo>

- the content of the js file (extend_seo_widget.js)

odoo.define('fk_website_seo.extend_seo_widget', function (require) {
    'use strict';

var core = require('web.core');
var ajax = require('web.ajax');
var qweb = core.qweb;
ajax.loadXML('/fk_website_seo/static/src/xml/extend_seo_widget.xml', qweb);
});

- added the xml extension to manifest as qweb

'qweb': [
    'static/src/xml/extend_seo_widget.xml'
],
'data': [
     'views/add_jas.xml',
],

- and tried to inherit the SEO widget, with extend_seo_widget.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <templates id="template" xml:space="preserve">
        <t t-name="website.seo_preview" t-extend="website.seo_preview">
            <t t-jquery=".oe_seo_preview_g" t-operation="after">
                <h1>TEST TEST TEST TSET</h1>
                <label for="test">Frequency</label>
                <field name="test"/>
            </t>
        </t>
    </templates>
</odoo>

- and inherited the website.seo.metadata model, as follow

class inheritedSEOwidget(models.Model):
# this website.seo.metadata is an Abstract model, andthe only way I could inherited it it was using models.Model...
    _inherit = 'website.seo.metadata'
    _name = "extended.website.seo.metadata"

    test = fields.Char(string="Test")

I'm not getting any errors, but still nothing changed there.

that is driving me crazy.

Can you have a look pls?

What am I doing wrong? Google it a lot, and tested everything I got..nothing worked o far.

pls and thank you