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# Copyright 2020 Le Filament
# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
from odoo import fields, models, api
class ModelName(models.Model):
_inherit = 'account.payment.order'
attachment_ids = fields.One2many(
comodel_name='ir.attachment',
compute='_compute_attachment_ids'
)
@api.multi
def _compute_attachment_ids(self):
Attachment = self.env['ir.attachment']
for po in self:
po.attachment_ids = Attachment.search([
('res_model', '=', 'account.payment.order'),
('res_id', '=', po.id)
])