title: Calculate date diff in Eloquent where clause Laravel 5
body: <p>In my Laravel 5 app I've got a relationship, and from this one-to-many relationship, I want to query and get only results whose date diff between their creation_date and an arbitrary date is between 0 and 2 days.</p>
  
  <p>If you need I can show you a pseudocode, even if I think that it's clear what I need.</p>
  
  <p>Thank you!</p>