How to prevent duplicate entry on parse?

Question

I\' trying to save song info to parse, but if the song already exist in parse I want my code just do nothing.

I\'ve tried this code below:

var Music         


        

Answer 1

I suggest to implement a simple beforeSave trigger, on Parse Cloud code, in order to check if the new entry song already exist (basically you're going to make one or more field uniques. For example:

Parse.Cloud.beforeSave("Musics", function(request, response) {

  var newEntrySong = request.object;

  var querySongs = new Parse.Query("Musics");
  querySongs.equalTo("title", newEntrySong.get("title"));
  querySongs.equalTo("description", newEntrySong.get("description"));

  // this could be a sort of signature for your song, to make more unique (skipping spaces and new lines for example)
  querySongs.equalTo("md5Title", newEntrySong.get("md5Title"));
  querySongs.first({
    success: function(temp) {
        response.error({errorCode:123,errorMsg:"Song already exist!"});          
    },
    error: function(error) {
      response.success();
    }
  });
});

Hope it helps.