[ADD] export_bg: add new module

export_bg/README.rst

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+.. |company| replace:: ADHOC SA
+
+.. |company_logo| image:: https://raw.githubusercontent.com/ingadhoc/maintainer-tools/master/resources/adhoc-logo.png
+   :alt: ADHOC SA
+   :target: https://www.adhoc.inc
+
+.. |icon| image:: https://raw.githubusercontent.com/ingadhoc/maintainer-tools/master/resources/adhoc-icon.png
+
+.. image:: https://img.shields.io/badge/license-AGPL--3-blue.png
+   :target: https://www.gnu.org/licenses/agpl
+   :alt: License: AGPL-3
+
+=================
+Export Background
+=================
+
+Automatically exports large datasets (>500 records) in background to avoid timeouts.
+
+Installation
+============
+
+Install the module and its dependency: ``base_bg``
+
+Configuration
+=============
+
+Optional: Configure the record threshold in **Settings > Technical > System Parameters**:
+
+* Key: ``export_bg.record_threshold``
+* Default: ``500``
+
+Usage
+=====
+
+1. Go to any list view and select records to export
+2. Click **Export** and choose your format (CSV or XLSX)
+3. If records exceed the threshold:
+   - You'll receive a notification: "Export sent to background"
+   - You'll receive a message with download link when ready
+
+For exports under the threshold, it works as normal (instant download).
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+   :alt: Try me on Runbot
+   :target: https://runbot.dev-adhoc.com/
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/ingadhoc/miscellaneous/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smashing it by providing a detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* |company| |icon|
+
+Contributors
+------------
+
+Maintainer
+----------
+
+|company_logo|
+
+This module is maintained by the |company|.
+
+To contribute to this module, please visit https://www.adhoc.inc.

export_bg/__init__.py

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+from . import models

export_bg/__manifest__.py

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+##############################################################################
+#
+#    Copyright (C) 2026  ADHOC SA  (http://www.adhoc.com.ar)
+#    All Rights Reserved.
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+{
+    "name": "Export Background",
+    "version": "18.0.1.0.0",
+    "category": "Technical",
+    "author": "ADHOC SA",
+    "website": "https://www.adhoc.com.ar",
+    "license": "AGPL-3",
+    "summary": "Export large datasets in background to avoid timeouts",
+    "depends": [
+        "base_bg",
+        "web",
+    ],
+    "data": [],
+    "assets": {
+        "web.assets_backend": [
+            "export_bg/static/src/views/list_controller.js",
+        ],
+    },
+    "installable": True,
+    "auto_install": False,
+    "application": False,
+}

export_bg/models/__init__.py

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+from . import export_bg_mixin

export_bg/models/export_bg_mixin.py

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+import base64
+import io
+import json
+
+from markupsafe import Markup
+from odoo import _, models
+from odoo.addons.web.controllers.export import CSVExport
+from odoo.tools.misc import xlsxwriter
+
+
+class IrModel(models.Model):
+    _name = "ir.model"
+    _inherit = ["ir.model", "base.bg"]
+
+    def _prepare_export_data(self, data):
+        params = json.loads(data)
+        Model = self.env[params["model"]].with_context(**params.get("context", {}))
+        records = Model.browse(params["ids"]) if params.get("ids") else Model.search(params.get("domain", []))
+        return (
+            params,
+            [f["string"] for f in params["fields"]],
+            records.export_data([f["value"] for f in params["fields"]]).get("datas", []),
+        )
+
+    def web_export_csv(self, data):
+        params, headers, export_data = self._prepare_export_data(data)
+        content = CSVExport().from_data(params["fields"], headers, export_data).encode()
+        return self._save_attachment(params["model"], content, ".csv", "text/csv;charset=utf8")
+
+    def web_export_xlsx(self, data):
+        params, headers, export_data = self._prepare_export_data(data)
+        buf = io.BytesIO()
+        wb = xlsxwriter.Workbook(buf, {"in_memory": True})
+        ws = wb.add_worksheet()
+        ws.write_row(0, 0, headers)
+        for i, row in enumerate(export_data, 1):
+            ws.write_row(i, 0, row)
+        wb.close()
+        return self._save_attachment(
+            params["model"],
+            buf.getvalue(),
+            ".xlsx",
+            "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+        )
+
+    def _save_attachment(self, model, content, ext, mime):
+        att = self.env["ir.attachment"].create(
+            {"name": f"{model}{ext}", "datas": base64.b64encode(content), "mimetype": mime}
+        )
+        return Markup(
+            f'<p>{_("Your export is ready!")}</p><p><a href="/web/content/{att.id}?download=true" class="btn btn-primary"><i class="fa fa-download"/> {_("Download")} {att.name}</a></p>'
+        )

export_bg/static/src/views/list_controller.js

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+/** @odoo-module **/
+
+import { ListController } from "@web/views/list/list_controller";
+import { patch } from "@web/core/utils/patch";
+
+patch(ListController.prototype, {
+    async downloadExport(fields, import_compat, format) {
+        const resIds = this.isDomainSelected ? false : await this.getSelectedResIds();
+        const recordCount = resIds ? resIds.length : (this.model.root.count || 0);
+
+        const threshold = await this.model.orm.call(
+            "ir.config_parameter",
+            "get_param",
+            ["export_bg.record_threshold", "500"]
+        );
+
+        if (recordCount > parseInt(threshold)) {
+            const data = {
+                model: this.props.resModel,
+                fields: fields,
+                ids: resIds,
+                domain: this.model.root.domain,
+                import_compat: import_compat,
+            };
+
+            const method = format === "csv" ? "web_export_csv" : "web_export_xlsx";
+            const actionResult = await this.model.orm.call(
+                "ir.model",
+                "bg_enqueue",
+                [method],
+                {
+                    data: JSON.stringify(data),
+                }
+            );
+
+            if (actionResult && actionResult.type === "ir.actions.client") {
+                this.env.services.action.doAction(actionResult);
+            }
+        } else {
+            await super.downloadExport(...arguments);
+        }
+    },
+});