title: Rails pass params/arguments to ActiveRecord callback function
body: <p>I have the snippet below in one of my AR models:</p>
  
  <pre><code>after_update :cache_bust
  </code></pre>
  
  <p>The <code>cache_bust</code> method in the model accepts a parameter (boolean) that sets the value of itself to <code>false</code> by default.</p>
  
  <p>How can I pass <code>true</code> to this method in the model from my ActiveRecord callback defined above it?</p>
  
  <p>Ex: <code>after_update :cache_bust(true)</code> does not work because it's a symbol, how can I pass <code>true</code> to the method's param?</p>