19.0 vanilla

odoo-bringout-oca-ocb-account_edi/account_edi/models/account_move_send.py

@@ -0,0 +1,19 @@
+from odoo import api, models
+
+
+class AccountMoveSend(models.AbstractModel):
+    _inherit = 'account.move.send'
+
+    @api.model
+    def _get_mail_attachment_from_doc(self, doc):
+        attachment_sudo = doc.sudo().attachment_id
+        if attachment_sudo.res_model and attachment_sudo.res_id:
+            return attachment_sudo
+        return self.env['ir.attachment']
+
+    def _get_invoice_extra_attachments(self, move):
+        # EXTENDS 'account'
+        result = super()._get_invoice_extra_attachments(move)
+        for doc in move.edi_document_ids:
+            result += self._get_mail_attachment_from_doc(doc)
+        return result