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Upload image and send email without saving to the database
The email that attached with uploaded image doesn't need to be saved into database. I just want to send the email.
@candidate_mail = candidate_mail
As for the image url: depends. Too little info to give a complete answer, but likely it's not a public url. See into the gem you use for file uploading for a "make public url" option.
Also now you can use different services by type https://stripo.email/templates/ to generate html emails for electronic mail, there are a large number of different templates and you just need to choose the right one, enter your data and make a newsletter, it's easy!