How to add a download hyperlink for downloading attachments from website in odoo - odoo-9

Question

I want to add a hyperlink in the website module in odoo using which I can download the attachments which consists of information of the product which was created.Please help with with this problem .
Thank you

Answer 1

It is too late to answer this question. Anyway it might be helpful to some one. I have googled more, since i didn't get any write solution.
Step 1:
Create hyperlink for download button. In that button you need to pass
model name
field
id
filename (optional)
For an example your link should be like this
<a t-attf-href="/web/binary/download_document?model=product.brand.files&field=file&id={{ file.id }}&file_name={{ file.file_name }}">
Step 2:
Create controller for above link. Ex
class Binary(http.Controller):
#http.route('/web/binary/download_document', type='http', auth="public")
#serialize_exception
def download_document(self,model,field,id,file_name=None, **kw):
""" Download link for files stored as binary fields.
:param str model: name of the model to fetch the binary from
:param str field: binary field
:param str id: id of the record from which to fetch the binary
:param str filename: field holding the file's name, if any
:returns: :class:`werkzeug.wrappers.Response`
"""
Model = request.env[model].sudo().search([('id', '=', int(id))])
filecontent = base64.b64decode(Model.file or '')
headers = werkzeug.datastructures.Headers()
if not filecontent:
return request.not_found()
else:
if not file_name:
filename = '%s_%s' % (model.replace('.', '_'), id)
headers.add('Content-Disposition', 'attachment', filename=filename)
return request.make_response(filecontent,headers)
else:
headers.add('Content-Disposition', 'attachment', filename=file_name)
return request.make_response(filecontent,headers)
It will work. Above code for Odoo 10. You can do the same for below versions also. I have got refer from this link
Cheers.

Answer 2

Here is a working example
return {
'type': 'ir.actions.act_url',
'url': '/web/content/%s/%s' % (attachment_id.id, shortname),
'target': 'self',
'nodestroy': False,
}
In short you just have to have a link that goes to /web/content/ir_attachment_id/the_name_you_want_the_file_to_have.
This works on Odoo V10 too.

Answer 3

this is work from odoo 10 you must try
<a t-attf-href="/web/content?model=website.support.ticket.message&field=attachment&id={{chat.id}}&filename={{chat.attachment_filename}}&download=true">Download</a>

Answer 4

If this is for a form you could do this entirely in the view. First add a record entry somewhere in the xml file:
<record id="module_name.http_link" model="ir.actions.act_url">
<field name="name">Button Name</field>
<field name="type">ir.actions.act_url</field>
<field name="target">new</field>
<field name="url">https://your-http-link</field>
</record>
And then in the form:
<button type="action" name="%(http_link)d" string="Name" class="oe_highlight"/>