In Odoo, when working with Sales Order lines and ensuring they are saved automatically while the Sales Order is in editing mode, you can consider the following approaches:

1. Using @api.onchange to Auto-Save Order Lines

If you want the Sales Order lines to be saved automatically when modified, you can use the @api.onchange decorator in your custom module:

python
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from odoo import models, fields, api

class SaleOrderLine(models.Model):
    _inherit = "sale.order.line"

    @api.onchange('product_id', 'product_uom_qty', 'price_unit')
    def _auto_save_order_line(self):
        if self.order_id and self.order_id.state in ['draft', 'sent']:
            self.order_id.write({'order_line': [(1, self.id, {
                'product_id': self.product_id.id,
                'product_uom_qty': self.product_uom_qty,
                'price_unit': self.price_unit,
            })]})

• This triggers an automatic save when changes are made to the product_id, product_uom_qty, or price_unit.

2. Overriding the Write Method

If you want to automatically save sales order lines when edited, override the write method:

python
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class SaleOrder(models.Model):
    _inherit = "sale.order"

    def write(self, vals):
        res = super(SaleOrder, self).write(vals)
        if 'order_line' in vals:
            for line in self.order_line:
                line.write({})  # Forces a save
        return res

• This ensures that when the Sales Order is edited and saved, the Sales Order lines are also saved.

3. Using @api.depends with stored=True to Persist Changes

Another approach is to make fields stored so that Odoo automatically saves changes:

python
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class SaleOrderLine(models.Model):
    _inherit = "sale.order.line"

    total_price = fields.Float(compute="_compute_total_price", store=True)

    @api.depends('product_uom_qty', 'price_unit')
    def _compute_total_price(self):
        for line in self:
            line.total_price = line.product_uom_qty * line.price_unit

• The store=True ensures that when quantity or price changes, the data is persisted automatically.

4. Enabling Auto-Save in the Frontend (JavaScript)

For an immediate update in the UI, override the sale.order form view in XML and add autosave="true":

xml
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<record id="view_order_form_inherit" model="ir.ui.view">
    <field name="name">sale.order.form.inherit</field>
    <field name="model">sale.order</field>
    <field name="inherit_id" ref="sale.view_order_form"/>
    <field name="arch" type="xml">
        <xpath expr="//form" position="attributes">
            <attribute name="autosave">true</attribute>
        </xpath>
    </field>
</record>

• This ensures the form saves changes automatically.