How to show 3 digits using the sum feature of the Tree View in Odoo version 17

Question

In a Odoo version 17 model, the Total Volume (total_cbm) is declared with 3 decimal digits

total_cbm = fields.Float(string="Total Volume (CBM)", digits=(16, 3))

However, in the XML template inside the tree view, it was summed up, but the sum does not have 3 decimal digits

<page string="Package Details">
    <group invisible="transport == 'air'">
        <field name="freight_packages" nolabel="1" widget="one2many_list">
            <tree string="Package">
        <field name="name" />
        <field name="seal_number"/>
        <field name="package_type"/>
        <field name="package" required="1"/>
        <field name="container_type" optional="hide"/>
        <field name="qty" sum="Total Qty."/>
        <field name="volume"/>
        <field name="gross_weight"/>
        <field name="net_weight" sum="Total Net"/>
        <field name="total_cbm" sum="Total Volume"/>
        <field name="line_added" column_invisible="1"/>
        <button name="action_insert_line_service" type="object" string="Add to Service" icon="fa-plus-square-o" invisible="line_added"/>
        </tree>
        <form string="Package">
        <field name="container_name_hidden" invisible="1"/>
        <field name="seal_number_hidden" invisible="1"/>
        <field name="container_type_hidden" invisible="1"/>
        <field name="type_hidden" invisible="1"/>
                <field name="carrier_seal_hidden" invisible="1"/>
        <field name="container_name_required" invisible="1"/>
        <field name="seal_number_required" invisible="1"/>
        <field name="container_type_required" invisible="1"/>
        ...
             ...

I tried adding digits inside the tree but it produced an error.

<field name="total_cbm" sum="Total Volume" digits="(16, 3)"/>

UncaughtPromiseError > OwlError Uncaught Promise > An error occured in the owl lifecycle (see this Error's "cause" property) OwlError: An error occured in the owl lifecycle (see this Error's "cause" property) Error: An error occured in the owl lifecycle (see this Error's "cause" property) at handleError at App.handleError ... Caused by: SyntaxError: Unexpected token '(', "(16,3)" is not valid JSON at JSON.parse ()

What is the correct way to format the total with 3 digits?

Answer 1

What if you try to define float:

<field name="total_cbm_display" sum="Total Volume" widget="float"/>

But I think this is the default setting.

To set the precision see also this answer on SO!