Example for changing logic depending on mongo results.

example-mongo-connect.ion.js

CollectionOne.find( { 'search-term-here' : 'value' }, function(e, col1) {
  if (e) return cb(e);
  CollectionTwo.find( { 'your-search-here' : 'value' }, function(e, col2) {
    if (e) return cb(e);
  
    if (!results || !results.length) {
      noPreviousResults(col1, cb);
    } else {
      previousResults(col1, col2, cb);
    }
  });
});

var noPreviousResults = function(col1, cb) {
  var newCollection = {}; // New record
  newCollection = new CollectionTwo(newCollection);
  
  newCollection.save(function(e) {
    if (e) return cb(e);
    col1.property = 'Some Arbitrary Value'
    col1.save(cb);
  })
};

var previousResults = function(col1, col2, cb) {
  col2.someProperty = 'something';
  col1.someOtherProperty = 'something-else';
  
  col2.save();
  col1.save(cb);
}