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invoicepurchase_orderv17
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Peter Schiffmann

In Odoo 17 purchase.order has invoices:

invoice_ids = fields.Many2many('account.move', compute="_compute_invoice", string='Bills', copy=False, store=True)

and each account.move has a purchase:

purchase_id = fields.Many2one('purchase.order', store=False, readonly=False,
    string='Purchase Order',
    help="Auto-complete from a past purchase order.")

I added a simple field in Purchase:

class PurchaseOrder(models.Model):
    _inherit = "purchase.order"
    accounting_note = fields.Char()

and want to show this field's value in each related Invoice, too:

class AccountMove(models.Model):
    _inherit = "account.move"
    accounting_note = fields.Char(readonly=True)

So far I tried to compute it in AccountMove, but failed:

accounting_note = fields.Char(compute="_compute_accounting_note")

@api.depends("purchase_id")
def _compute_accounting_note(self):
    for record in self:
        record.accounting_note = record.purchase_id.accounting_note

and to set it onchange in PurchaseOrder (write is not allowed here, according to docs), but failed too:

@api.onchange("accounting_note")
def _update_accounting_notes(self):
    for record in self:
        for invoice in record.invoice_ids:
            invoice.accounting_note = record.accounting_note

In Purchase Order the value is fine, but it never appeared in the Invoices.
I suppose this due to certain limitations of the store/computed M2M/O2M fields.
How do I get this right?

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Codesphere Tech

Hello,
Have you tried in below method?
def _prepare_invoice(self):
res = super()._prepare_invoice()
res["accounting_note"] = self.accounting_note
return res
Keep acounting_note field as it is in account.move

Peter Schiffmann
作者

This would only set the field for new (created) invoices.
I would prefer to fill/get this field's value for all invoices on change, not only new ones.

Codesphere Tech

You can configure schedule action for old records. Is it feasible for your customization?

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Cybrosys Techno Solutions Pvt.Ltd
最佳答案

Hi,


The issue occurs because the link between Purchase Orders and Bills in Odoo 17 is based on computed and non-stored fields, which don’t automatically update or propagate values.


To display the accounting_note from the purchase order on its related bills, there are two reliable methods:


    Use a related field — define accounting_note = fields.Char(related="purchase_id.accounting_note", store=True, readonly=True).

    This automatically displays the purchase note on the bill and updates if the purchase note changes.   


     class AccountMove(models.Model):

        _inherit = "account.move"


        accounting_note = fields.Char(related="purchase_id.accounting_note", store=True, readonly=True)


    Copy the value when the bill is created — override the bill’s create method to set accounting_note from the purchase order once during creation.

    This keeps the bill’s note fixed, even if the purchase order changes later.


    class AccountMove(models.Model):

        _inherit = "account.move"


        accounting_note = fields.Char(readonly=True)


        @api.model_create_multi

        def create(self, vals_list):

            records = super().create(vals_list)

            for move in records:

                if move.purchase_id and move.purchase_id.accounting_note:

                    move.accounting_note = move.purchase_id.accounting_note

            return records


In short, the related field is best for dynamic syncing, while copying on creation is ideal for keeping a static record.


Hope it helps

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