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add instructions to override settings using ActionMailer callbacks #176

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add instructions to override settings using ActionMailer callbacks #176

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4 changes: 3 additions & 1 deletion .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -10,10 +10,12 @@ tmtags
\#*
.\#*


## VIM
*.swp

## INTELLIJ
.idea

## PROJECT::GENERAL
tags
coverage
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37 changes: 37 additions & 0 deletions README.md
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Expand Up @@ -372,6 +372,43 @@ class AwesomeMailer < ApplicationMailer
end
```

You also can override default settings using [ActionMailer after callback](https://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-callbacks):

```ruby
class ApplicationMailer < ActionMailer::Base
before_action :set_user
after_action :override_mailjet_defaults

def awesome_mail
mail(to: @user.email)
end

private

def set_user
@user = params[:user]
end

def override_mailjet_defaults
mailjet_api_key = params[:mailjet_api_key].presence
mailjet_secret_key = params[:mailjet_secret_key].presence

unless mailjet_api_key.nil? || mailjet_secret_key.nil?
mail.delivery_method.settings.merge!(
user_name: mailjet_api_key,
password: mailjet_secret_key
)
end
end
end

# using default settings from initializer
ApplicationMailer.with(user: user).awesome_email.deliver_now

# temporary using other settings
ApplicationMailer.with(user: user, mailjet_api_key: 'api_key', mailjet_secret_key: 'secret_key').awesome_email.deliver_now
```

Keep in mind that to use the latest version of the Send API, you need to specify the version via `delivery_method_options`:

```ruby
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