web.js

function getAll(collection, res){
  collection.list(function(err, resModels, options){
    var results = [], pages;
    if(err) {
      console.log(err);
      res.send(500);
    }
    console.log('page 1');

    results.push(resModels);
    pages = Number(options.pages)
    if(pages > 1) {
      for(var i = 2; i < pages; i++) {
        collection.list({page: i}, function(err, pageModels){
          console.log('page ', i);
          if(err) { throw err; }
          console.log(pageModels.length);
          results.push(pageModels);
          if(i === pages) {
            res.send(_.flatten(results));
          }
        });
      }
    } else {
      res.send(_.flatten(results));
    }
  });
}