title: multiple where clauses in redbeanphp
body: <p>I'm using readbeanphp as ORM for my php project. I'm trying to load a bean with an additional where clasue. But i'm not sure how to do this.</p>
  
  <p>Normally i'd get a 'bean' like this:</p>
  
  <pre><code>$book = R::load('book', $id);
  </code></pre>
  
  <p>Which is basically like saying: </p>
  
  <pre><code>SELECT * FROM book WHERE id = '$id'
  </code></pre>
  
  <p>But i need to add another condition in the where clause:</p>
  
  <pre><code>SELECT * FROM book WHERE id = '$id' AND active = 1
  </code></pre>
  
  <p>How can i do this with redbeanphp?</p>