title: Migration run will execute rb files under 'config/initializers/' firstly?
body: <p>Is it so that if I run '<strong>rake db:migrate</strong>' to run the latest migration, the files under '<strong>config/initializers/</strong>' will be triggered to run firstly?</p>
  
  <p>At least, when I create migration with '<strong>rails generate migration XXXX</strong>' command, the ruby files under '<strong>config/initializers/</strong>' will run firstly... So, I would like to know is it so that all the initializer files will be run before migration run?</p>