title: Storing an Array in rails 4 using sqlite
body: <p>I'm looking to add a row to my "posts" database that can store an array that holds multiple user id's. I noticed that none of the other questions asked on here were using rails 4. I think that this is going to require me to serialize the information but I'm not sure how to do this.</p>
  
  <p>thanks in advance!</p>