title: Update if exists, else do nothing?
body: <p>I'm trying to update a value of a model if and only if the model exists. If it doesn't, I do nothing. Searching only seems to return update or create questions/answers, but I do not want to create. </p>
  
  <p>I know I can do it with a simple:</p>
  
  <pre><code>found = Model.find_by_id(id)
  if found
    update stuff
  end
  </code></pre>
  
  <p>However, I feel like there is a way to do this in one call, without assigning any temporary local values or doing an if.</p>
  
  <p>How would I write a rails call to update a record without noisy errors if it doesnt exist?</p>
  
  <p>Latest Rails 3.x</p>