I'm stuck.

My db is currently hosted with Odoo Online v17.1, and I need to print/download a large number of sales orders as separate PDFs. I have multiple batches of 50-100 quotes each.

I find that from the list view, selecting multiple quotes/orders and using any of the Print button/menu options concatenates all selected items into a single PDF. While useful for most other report types, that is extremely annoying for quotes, sales orders, invoices, proforma invoices, purchase orders, etc.

I chased multiple solutions, none of which will work with Odoo Online. I tried implementing a Server Action. Turns out 'safe_eval.py' is tight as hell. No 'import' statements, nor 'base64' or 'zipfile' built-ins. Then I tried writing my own module. Turns out custom python isn't even allowed Online, only on .sh or On-premise.

But I can't switch to either of those, because my db is already on 17.1, and I've just learned that downgrading is not an option, and Odoo.sh / On-Premise do not support intermediary versions.

I also find that people have been asking about this for the last 5+ years. What gives??? This is a simple as hell module. Why is something like this not already part of the code base?

from odoo import models, fields, api
import base64
import zipfile
import io

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

    @api.multi
    def batch_print_pdfs(self):
        report_template = 'sale.report_saleorder'
        download_urls = []

        for order in self:
            pdf_content, _ = self.env.ref(report_template)._render_qweb_pdf([order.id])
            attachment = self.env['ir.attachment'].create({
                'name': f'SaleOrder_{order.name}.pdf',
                'type': 'binary',
                'datas': base64.b64encode(pdf_content),
                'res_model': 'sale.order',
                'res_id': order.id,
                'mimetype': 'application/pdf'
            })
            download_urls.append(f'/web/content/{attachment.id}?download=true')

        js_downloads = "".join([f"window.open('{url}');" for url in download_urls])
        return {
            'type': 'ir.actions.client',
            'tag': 'action_warn',
            'params': {
                'title': 'Downloading...',
                'message': 'Your files are being downloaded. Please check your browser\'s download manager.',
                'sticky': False,
                'next': {'type': 'ir.actions.client', 'tag': 'reload'}
            },
            'context': {'js': js_downloads},
        }

    @api.multi
    def batch_print_pdfs_zipped(self):
        report_template = 'sale.report_saleorder'
        attachments = []

        for order in self:
            pdf_content, _ = self.env.ref(report_template)._render_qweb_pdf([order.id])
            pdf_base64 = base64.b64encode(pdf_content)
            attachment = self.env['ir.attachment'].create({
                'name': f'SaleOrder_{order.name}.pdf',
                'type': 'binary',
                'datas': pdf_base64,
                'res_model': 'sale.order',
                'res_id': order.id,
                'mimetype': 'application/pdf'
            })
            attachments.append(attachment)

        zip_buffer = io.BytesIO()
        with zipfile.ZipFile(zip_buffer, 'w', zipfile.ZIP_DEFLATED) as zip_file:
            for attachment in attachments:
                pdf_data = base64.b64decode(attachment.datas)
                zip_file.writestr(attachment.name, pdf_data)

        zip_buffer.seek(0)
        zip_data = zip_buffer.read()
        zip_base64 = base64.b64encode(zip_data)

        zip_attachment = self.env['ir.attachment'].create({
            'name': 'sale_orders.zip',
            'type': 'binary',
            'datas': zip_base64,
            'res_model': 'sale.order',
            'res_id': self[0].id,
            'mimetype': 'application/zip'
        })

        return {
            'type': 'ir.actions.act_url',
            'url': f'/web/content/{zip_attachment.id}?download=true',
            'target': 'self',
        }

The only thing left to try would be via the API?