title: rails - find_by_sql: wrong number of arguments (2 for 1)
body: <p>Getting <code>wrong number of arguments (2 for 1)</code> for the code below...any ideas?</p>
  
  <pre><code>@user_industry = current_user.industry
  
  @industries = Listing.find_by_sql("SELECT * FROM listings WHERE industry = ?", @user_industry)
  </code></pre>