title: Call to undefined method Illuminate\Database\Query\Builder
body: <p>I am new to laravel 4 and keep getting the same error trying to learn about some methods in DB class.</p>
  
  <pre><code>Call to undefined method Illuminate\Database\Query\Builder
  </code></pre>
  
  <p>I get same erros trying to use "->or_where", "->order_by".</p>
  
  <p>another problem is parsing the dynamic methods:</p>
  
  <pre><code>-&gt;where_name("test") 
  </code></pre>
  
  <p>turns into </p>
  
  <pre><code>`users` where `_name` = test)
  </code></pre>
  
  <p>but if i try to do </p>
  
  <pre><code>-&gt;wherename("test")
  </code></pre>
  
  <p>then everything is fine.</p>