Rails Console 'helper' and 'app' Appear Incomplete
<p>Using ruby 2.3.0 and rails 4.2.5.1, I'm trying to figure some things
out using the rails console. I have several instances where <code>app</code> or <code>helper</code> seem like they have a method I want, but I often end up with the NoMethodError message. This happens even in a brand-new application where I've edited nothing and given no special options to the <code>rails new</code> command. For instance:</p>

<pre><code>irb(main):015:0* helper.timez
</code></pre>

<p>... here I hit <code>TAB</code> to get:</p>

<pre><code>irb(main):015:0* helper.timezone
</code></pre>

<p>... and hit <code>ENTER</code>, only to find:</p>

<pre><code>NoMethodError: undefined method `timezone' for #&lt;ActionView::Base:0xc662b80&gt;
</code></pre>

<p>Why would tab-expansion in the console expand to methods that don't
exist? More importantly, if they're supposed to be there, why aren't
they? What can I be doing wrong?</p>