how to add fields in inherited notebook/page/field
<p>I have inherited 'sales order' from 'sales' module.</p>

<p>I need to add two extra fields inside 'Order Lines' tab.</p>

<p>.py</p>

<pre><code>class SalesOrderInherit(models.Model):
        _inherit = "sale.order"
type = fields.Selection([('appointment', 'Appointment'), ('walkin', 'Walk-In')], string="Type")
</code></pre>

<p>I need to add type field inside 'Order Lines' tab.</p>

<p>Which table should i inherit?</p>

<p>How to write  to add above field.</p>