server-tools/autovacuum_message_attachment/models/ir_attachment.py

# Copyright (C) 2018 Akretion
# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).

from odoo import fields, models
from datetime import timedelta


class IrAttachment(models.Model):
    _name = "ir.attachment"
    _inherit = ["ir.attachment", "autovacuum.mixin"]
    _autovacuum_relation = 'attachment_ids'

    def _get_autovacuum_domain(self, rule):
        domain = super()._get_autovacuum_domain(rule)
        today = fields.Datetime.now()
        limit_date = today - timedelta(days=rule.retention_time)
        domain += [('create_date', '<', limit_date)]
        if rule.filename_pattern:
            domain += [('name', 'ilike', rule.filename_pattern)]
        if rule.model_ids:
            models = rule.model_ids.mapped('model')
            domain += [('res_model', 'in', models)]
        else:
            # Avoid deleting attachment without model, if there are, it is
            # probably some attachments created by Odoo
            domain += [('res_model', '!=', False)]
        return domain