title: Phalcon: SQLSTATE[22P02]: Invalid text representation: 7 ERROR: invalid input syntax for integer: ""
body: <p>How to pass to phalcon that some of columns are of type integer and empty values should be NULL not empty strings for them?</p>
  
  <p>When I write <code>'emptyValue' =&gt; (int) Null</code> in Form then it passes 0 to database ...</p>