title: Set default order of a has_many resource at the Active Record level
body: <p>How do you set the default order of resources coming out of the db.
  Something like:</p>
  
  <pre><code>has_many :trips, :order =&gt; 'departure_date DESC'
  </code></pre>
  
  <p>There is some business logic that needs the most recent date being checked first.</p>
  
  <p>Current code results in this error.</p>
  
  <pre><code>ArgumentError (Unknown key: :order. Valid keys are: :class_name,     :anonymous_class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type):
  </code></pre>
  
  <p>Was trying <a href="https://stackoverflow.com/questions/738971/how-do-i-automatically-sort-a-has-many-relationship-in-rails">this</a> as it received good reviews (6yrs ago.) Am I missing something simple or has that be depricated in favor of a better way today?</p>