title: How do I specify this `WHERE` condition without using SQL?
body: <p>I'm using the following raw Postgres SQL in my <code>where()</code> call to find records where <code>some_date</code> is two days from now:</p>
  
  <pre><code>SomeModel.where('date(some_date) - date(NOW()) = 2')
  </code></pre>
  
  <p>Can it be written using pure ActiveRecord syntax without raw SQL?</p>