Custom SMTP setting from database in ruby on rails? - ruby-on-rails-4

Question

Usually in rails we can config the smtp settings like:
ActionMailer::Base.smtp_settings = {
:address => "smtp.gmail.com",
:port => 587,
:domain => "anythingworks",
:user_name => "mygmailaddress#gmail.com",
:password => "somePW",
:authentication => "plain",
:enable_starttls_auto => true
}
But I need several connections from database value to be set as smtp and also if no value in database the default smtp settings should be used.
How can I achieve this ?

Answer 1

Just set it based on the database value, e.g.:
ActionMailer::Base.smtp_settings = {
:address => Setting.find_by(key: :smtp_address)&.value || 'smtp.gmail.com',
:port => 587,
:domain => "anythingworks",
:user_name => "mygmailaddress#gmail.com",
:password => "somePW",
:authentication => "plain",
:enable_starttls_auto => true
}
This assumes you have a database table called "settings" with key and value columns so you can set any generic config in it, one config item per record. And an ActiveRecord class Setting to access it.
It will fall back to the hard-coded value if the setting isn't present or the value is null.
The other thing is to make sure this config code is established at a point in the boot cycle when ActiveRecord is already present. You could put it in config/initializers/mail.rb for example.