Upsert Parse Cloud

upsert.js

// Takes 3 parameters: 
//   class: the object type to update; a single String.
//   restrictions: the set of column restrictions; a Dictionary.
//   updates: the set of column updates; a Dictionary.

Parse.Cloud.define("upsert", function(request, response) {
  var query = new Parse.Query(request.params.class);
  
  var restrictions = JSON.parse(request.params.restrictions);
  for (var key in restrictions) {
    query.equalTo(key, restrictions[key]);
  }
  
  query.find().then(function(results) {
    var updates = JSON.parse(request.params.updates);
    if (results.length > 0) {
      for (var i = 0; i < results.length; i++) {
        for (var key in updates) {
          results[i].set(key, updates[key]);
        }
      }
      
      Parse.Object.saveAll(results).then(function(results){
        response.success(results.length + " object(s) were updated!");
      },function(error){
          response.error(error);
      });
    } else {
      var objectClass = Parse.Object.extend(request.params.class);
      var object = new objectClass();
      for (var key in updates) {
        object.set(key, updates[key]);
      }
      
      object.save(null, {
        success: function(obj) {
          response.success("1 new object was inserted!");
        },
        error: function(error) {
          response.error(error);
        }
      });
    }  
  }, function(error) {
    response.error(error);
  });
});