Hey everyone,

I got two issues related to the res_model and res_id fields in ir.attachment.

1) In a custom module I am trying to add attachtments to a HTML field. However res_id in ir.attachments remains at value 0 for all tickets  that I post.

For the attachments I copied the approach from the project module:

class Ticket(models.Model):

attachment_ids = fields.One2many('ir.attachment', compute='_compute_attachment_ids', string="Attachments", help="Attachment that don't come from message.")

def _compute_attachment_ids(self):
for ticket in self:
attachment_ids = self.env['ir.attachment'].search([('res_id', '=', ticket.id), ('res_model', '=', 'website.ticket')]).ids
message_attachment_ids = ticket.mapped('message_ids.attachment_ids').ids # from mail_thread
ticket.attachment_ids = list(set(attachment_ids) - set(message_attachment_ids))

But as res_id is not set correctly I do not get the correct number of attachments. When posting using mail.thread's Notes or document's Attach Files button res_id is set correctly.

2) The form view comes with additional TransientModels to send emails and post to the mail.thread. However I want  all attachments, including  mail.thread  posts of  those  TransientModels,  to  show  up  in  the  Attach  Files  drop  menu  of the documents module. For this, I guess I need to set res_model to the main model and res_id to the TransientModels parent id.

E.g.:

class Ticket(models.Model):

_name = "ticket"

ticket-id = 3

class Ticket.Forward (models.TransientModels):

_name = "ticket.forward"

id = ticket-id = 3

Sadly I have no idea how to accomplish this. Help would be greatly appreciated.