title: How can I make a CKQuery without predicate?
body: <p>I need to <strong>query</strong> all the record types, <strong>without any filtering</strong>. I tried two ways:</p>
  
  <pre><code>let query = CKQuery(recordType: "Pm", predicate: nil)
  let query = CKQuery(recordType: "Pm", predicate: NSPredicate(format: ""))
  </code></pre>
  
  <p>I got error:</p>
  
  <blockquote>
    <p>'NSInvalidArgumentException', reason: 'Unable to parse the format
    string ""'</p>
  </blockquote>
  
  <p>How to do?</p>