title: Add an array column to a resource
body: <p>I need help going through the steps to add an array column to a resource using the <code>rails g migration</code> command. I have a postgresql database. I need to make an array of strings, and another array of integers. I want it so that in my <code>schema.rb</code> file I have...</p>
  
  <pre><code>create_table "streams", force: true do |t|
  t.array   "ids"     #strings
  t.array   "lengths" #integers
  </code></pre>