gistfile1.js

 up_vote: function(data, callback){
  data.type="upvote";


  console.log(has_voted, 'has_voted, line 87');
  mdb.collection('kudos_bank', function(err, coll){
    coll.find({'target_hash':data.target_hash, 'id':data.id}, function(err, cursor){
      cursor.toArray(function(err, docs){
        console.log(docs);
        if (docs.length == 0) {
          console.log('row length was 0, user hasnt voted');
          has_voted = false;
        } else {
          has_voted = true;
        }
      
    
        if (!has_voted) {
      
          mdb.collection('content', function(err, content_db){
            content_db.update({'hash':data.target_hash}, {"$inc":{"ups":1}});
          });
      
          mdb.collection('users', function(err, users_db){
            users_db.update({'id':data.target_user}, {"$inc":{"kudos.ups":1, "kudos.total":1}});
          });
      
          mdb.collection('kudos_bank', function(err, kudos_db){
            kudos_db.insert(data);
          });
          return callback(null, data);
        } else {
          console.log('user has already voted');
          return callback(null, null);
        }
      });
    });
  });
},