ed earlier didn't have any attributes. Let's
add first and last name, as well as the birthday, using <a href="https://api.emberjs.com/ember-data/3.4/classes/DS/methods/attr?anchor=attr"><code>DS.attr</code></a>:</p>
<div class="filename javascript"><div class="ribbon"></div><span>app/models/person.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">import</span> <span class="token constant">DS</span> <span class="token keyword">from