Ticket attachments for attendee emails are not working.

[mrsaicharan1]

Describe the bug
After adding support for multi attendee ticket downloads, the storage path was changed. Due to this, the tickets weren't being attached. Ergo, the email wasn't being sent.

Reference
The key was changed in this PR. #6095
To Reproduce
Steps to reproduce the behavior:

1. Place any order
2. Email is not sent

Expected behavior
Emails & attachments should work as expected.
Stacktrace

/open-event-server/app/api/helpers/tasks.py", line 64, in send_email_task_sendgrid
    with open(attachment, 'rb') as f:
FileNotFoundError: [Errno 2] No such file or directory: 'generated/tickets/attendees/tickets/pdf/4c0b138f-fd0c-489b-a30b-57c971014861/dDlYVnIrN1/4c0b138f-fd0c-489b-a30b-57c971014861.pdf'

[iamareebjamal]

Still not working

No such file or directory: 'generated/tickets/orders/tickets/pdf/9b2314a4-594b-485d-9997-f5ca4a716f12/UC9XeTI5Q3/9b2314a4-594b-485d-9997-f5ca4a716f12.pdf'

[mrsaicharan1]

@iamareebjamal This issue was regarding the attachments. When the email was successfully sent, the tickets are attached. Why was this re-opened?

[iamareebjamal]

Because it's still not fixed?

[iamareebjamal]

The generated folder is not mounted in a volume and hence, each and every generated ticket gets deleted on each container restart and even if not, the generated PDF is not accessible to celery.

[iamareebjamal]

For urgent fix, at least the current logic needs to be fixed with volume properly mounted.

As a follow up issue, all static and media URLs need to be fixed once and for all. No hardcoded URL formatting should be present, nor the URls should be stored in DB. The layout of static storage will be changed to

media/
  static/
  uploads/
  generated/

Next, a script is to be made to generate all missing PDFs of attendees, tickets and orders. And to aggregate old data in proper places