title: Can't build query string using get_compiled_select() method of node-querybuilder
body: <p>I'm a new to <strong>node.js</strong> and using node-querybuilder for making api request to database. All is working good but when trying to use <strong>get_compiled_select()</strong> method of <strong>node-querybuilder</strong> nodejs package, it's giving a error like this.</p>
  
  <p><strong>Error:</strong></p>
  
  <pre><code>Caught error: ReferenceError: from_array is not defined
  </code></pre>
  
  <p>What I've tried code, is given below - </p>
  
  <p><strong>NodeJs Code:</strong></p>
  
  <pre><code>try {  
      var sql = db.select(["u.name"]).from("users u").get_compiled_select();
      console.log(sql);
  }
  catch(err) {
      console.error("Caught error: "  + err);
  }
  </code></pre>
  
  <p>Sorry for my bad English.</p>
  
  <p><strong>Thanks in advance.</strong></p>