javascript - Uploading a file that is of [object File] to Parse and getting [object Object] when queried back -

i trying upload picture files parse lost. feel defeated... sigh... anyhow, tried modify code on website: http://blog.teamtreehouse.com/reading-files-using-the-html5-filereader-api, in order upload files unto parse.

this html:

<div>     <form id="pictureuploadform">         select image file:          <input type="file" id="fileinput">         <input type="submit" id="picturebutton"  value="submit" />     </form> </div> 

to upload image file parse, wrote (it works, btw):

var pictureuploads = parse.object.extend("pictureuploads"); var pictureuploads = new pictureuploads();  window.onload = function() {     var fileinput = document.getelementbyid('fileinput');      fileinput.addeventlistener('change', function(e) {         var file = fileinput.files[0];         alert(file);         var pictureuploads = parse.object.extend("pictureuploads");         var pictureuploads = new pictureuploads();          pictureuploads.set("picturefile", file);          pictureuploads.save(null, {             success: function(pictureuploads) {          },             error: function(pictureuploads, error) {             print("didn't work");             }         });     }); } 

now, if notice alert(file), alert [object file]. , in order retrieve it, wrote (and works well):

$(document).ready(function(){      var query = new parse.query(pictureuploads);      query.get("yaiyfjpvfj", {         success: function(pictureuploads) {             var file = pictureuploads.get("picturefile");             alert(file);         },         error: function(object, error) {             alert("didn't work don't mad");          }     }); }); 

but problem is, when retrieve file saved object in parse via var file = pictureuploads.get("picturefile"); , alert() file, [object object]. can't work [object object] because tried run rest of code provided graciously on tree house website, didn't work.

so questions are, when query, why return [object object] , possible somehow modify [object object] becomes [object file]. please. me... dying...