Previously this used self.formats= to set the format which render would
use to find templates. This worked, but was untested, and looked a
little confusing because it was doing the mutation within a loop.
This commit replaces the assignment with passing formats: [format] into
the render call, which makes it more obvious that that's the purpose of
the format. It also adds a test to verify the formats being used.
Since production applications typically run with log level info and
email adresses should be considered as sensitive data we want to prevent
them from ending up in the logs. In development mode (with log level
debug) they are still logged as part of the Mail::Message object.
PR #29270 changed the number of arguments that gets passed to Procs
defined in ActionMail::Base.default. With this changeset, Procs can
now have 1 or 0 arguments
Also adds test coverage for AM::Base.default Proc arity.
Follows the same pattern as controllers and jobs. Exceptions raised in
delivery jobs (enqueued by `#deliver_later`) are also delegated to the
mailer's rescue_from handlers, so you can handle the DeserializationError
raised by delivery jobs:
```ruby
class MyMailer < ApplicationMailer
rescue_from ActiveJob::DeserializationError do
…
end
```
ActiveSupport::Rescuable polish:
* Add the `rescue_with_handler` class method so exceptions may be
handled at the class level without requiring an instance.
* Rationalize `exception.cause` handling. If no handler matches the
exception, fall back to the handler that matches its cause.
* Handle exceptions raised elsewhere. Pass `object: …` to execute
the `rescue_from` handler (e.g. a method call or a block to
instance_exec) against a different object. Defaults to `self`.
Implicit rendering in multipart blocks now also uses the template
name from the options hash instead of always using the action name.
So you can now write
mail(template_name: template_name) do |format|
format.text
format.html
end
Invoke mailer defaults as procs only if they are procs, do not convert
with to_proc. That an object is convertible to a proc does not mean it's
meant to be always used as a proc. Fixes#11533
Any ActionMailer class can be set to render and delier messages using
the new Rails Queue.
Some of this work was borrowed (with permission) from Nick Plante's
(zapnap) reqsue_mailer gem.
