[v19] Route to binary attachment fields

attachment url download v19

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INFOSERVE GmbH, Peter Schiffmann

In older Odoo versions, for providing download links to temporary files we usually:

added a TransientModel to our model class and added a BinaryField in there for the data:

class TheFileModel(models.TransientModel):
	_name = "the_file_model"
	data_file = fields.Binary("Some data")

created in download button's action a new entry for this model, e.g.:

entry = self.env["the_file_model"].sudo().create({"data_file": base64.encodebytes(data)})

and finally got:

url = f"/web/content/the_file_model/{entry.id}/data_file/file_name.csv?download=true"
return {"type": "ir.actions.act_url", "url": url, "target": "new",}

In Odoo 19, we constantly get 404 errors this way.
Is this due to the changed / shortened routing?
Or have we adapt this to the attachment ID (f"/web/content/{attachment.id}")?
Or some other mistake?

PS: Sorry, the text field threw away the last part. -.-

INFOSERVE GmbH, Peter Schiffmann

الكاتب أفضل إجابة

Reason was our fault:
We forgot to add/set the "the_file_model" to security/ir.model.access.csv within the module correctly.
Hint for others:
When the URL is changed to the attachment ID variant, Odoo reacts with a more expressive security error than the rather general HTTP 404 error.
The attachment ID can be found by calling after the create:

attachment = self.env['ir.attachment'].search([('res_model', '=', 'the_file_model'), ('res_id', '=', entry.id)], limit=1)

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