This module creates a new field that can be used to add a new parameter
on field property description. This parameter will allow us to show some
parameters on portal view.

Configure

Just modify the definition field like

from odoo import models

from odoo.addons.web_portal_properties.fields import PortalPropertiesDefinition


class ProjectProject(models.Model):
    _inherit = "project.project"

    task_properties_definition = PortalPropertiesDefinition()

Then, use the widget portal_properties on your field to allow the edition for the user.

Finally, on the portal template add this snippet with the right parameters:

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>
    <template id="portal_my_task" inherit_id="project.portal_my_task">
        <xpath expr="//div[@id='card_body']" position="inside">

            <t t-call="web_portal_properties.portal_properties">
                <t t-set="properties_record" t-value="task" />
                <t t-set="properties_field" t-value="'task_properties'" />
            </t>
        </xpath>
    </template>
</odoo>

Roadmap

It cannot be used on separators easily unless we duplicate some Odoo code or we ask for a hook on Odoo.

Usage

Example view of fields:

Example view on portal: