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* Support the use of underscored symbols when registering interceptors and
observers like we do elsewhere within Rails.
*Andrew White*
* Add the ability to intercept emails before previewing in a similar fashion
to how emails can be intercepted before delivery.
Fixes #13622.
Example:
class CSSInlineStyler
def self.previewing_email(message)
# inline CSS styles
end
end
ActionMailer::Base.register_preview_interceptor CSSInlineStyler
*Andrew White*
* Add mailer previews feature based on 37 Signals mail_view gem.
*Andrew White*
* Calling `mail()` without arguments serves as getter for the current mail
message and keeps previously set headers.
Fixes #13090.
Example:
class MailerWithCallback < ActionMailer::Base
after_action :a_callback
def welcome
mail subject: "subject", to: ["joe@example.com"]
end
def a_callback
mail # => returns the current mail message
end
end
*Yves Senn*
* Instrument the generation of Action Mailer messages. The time it takes to
generate a message is written to the log.
*Daniel Schierbeck*
* 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.
*Alex Tsukernik*
Please check [4-0-stable](https://github.com/rails/rails/blob/4-0-stable/actionmailer/CHANGELOG.md) for previous changes.
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