Rails ActionMailer - Prevent email deliveries for testing

Question

I'm trying to prevent emails from being delivered so I can inspect the contents of ActionMailer::Base.deliveries for testing in a staging environment. I have config.action_mailer.delivery_method = :test in my environment settings but Rails is still attempting to deliver the emails and the deliveries array is empty. What am I doing wrong?

I'm testing it out in my dev environment but I'm ultimately going to use it in a staging environment. I want to log the emails to the database instead of delivering them. — kid_drew, Mar 01 '21 at 21:20
In which file did you set the `delivery_method` config? Does your runtime config match w/ the environment you set it in? What version of RoR? etc. — Dave Newton, Mar 01 '21 at 21:24
`config/environments/development.rb`. I even double checked in the rails console that `Rails.application.config.action_mailer.delivery_method` is set properly. Rails 6.1.1 — kid_drew, Mar 01 '21 at 21:30
is `config.action_mailer.perform_deliveries` set to `false`? — engineersmnky, Mar 01 '21 at 21:41
No. Setting it to true does the same thing. Setting it to false prevent the mail from sending at all. — kid_drew, Mar 02 '21 at 16:57
Scratch that. Setting it to true does deliver and get caught in the deliveries array. But reloading the app clears that array, so that's a different issue. Interesting. — kid_drew, Mar 02 '21 at 17:30

score 0 · Answer 1 · answered Mar 02 '21 at 06:13

I agree with the other commenter that the best way to prevent all deliveries is through the action_mailer config.

However, if you want an alternative approach that would allow you to redirect any mail, or halt delivery based on a dynamic set of conditions, etc., then I would encourage you to check out Mail Interceptors:

http://guides.rubyonrails.org/action_mailer_basics.html#intercepting-emails

Rails ActionMailer - Prevent email deliveries for testing

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