title: ActiveModel::MissingAttributeError occurs after deploying and then goes away after a while
body: <p>I have a Rails 3.0.9 app that, once it is deployed, suffers from a bunch of ActiveModel::MissingAttributeErrors that crop up causing 500s. The errors occur fairly randomly, sometimes a page will load, other times it won't, but the attributes are all existing attributes in the database and should be found.</p>
  
  <p>The strange part is that after a while, the errors go away. Suddenly, they stop causing an issue.</p>
  
  <p>I have searched about for a solution to this, but this error mostly occurs either when someone has done <code>Model.all(:select =&gt; 'column_x,column_y')</code> and are calling for <code>column_z</code> or when they are using cache_money. I am doing neither of these things.</p>
  
  <p>Can anyone help?</p>