[FIX] account_ux: create binary field tto access invoice by API

account_ux/models/account_move.py

@@ -1,5 +1,6 @@
 # flake8: noqa
 import json
+import base64
 from odoo import models, api, fields, _
 from odoo.exceptions import UserError
 
@@ -16,6 +17,13 @@ class AccountMove(models.Model):
     )
     other_currency = fields.Boolean(compute='_compute_other_currency')
 
+    invoice_binary = fields.Binary(compute='_compute_invoice_binary')
+
+    def _compute_invoice_binary(self):
+        for rec in self:
+            bin_data, __ = self.env['ir.actions.report']._render_qweb_pdf('account.account_invoices', rec.id)
+            rec.invoice_binary = base64.b64encode(bin_data)
+
     @api.depends('company_currency_id', 'currency_id')
     def _compute_other_currency(self):
         other_currency = self.filtered(lambda x: x.company_currency_id != x.currency_id)