Question

So I already got this working using a loop but is wondering is there is a cleaner way to do this.

Basically i got a model that got an array of ids from another model, currently I loop every id and add manually model to a new collection using this filter on the model collection.

getOneById : function(id){
    return this.filter(function(data) {
        return data.get("id") == id;
    });
},

Is there a way to directly return a list doing something like

getAllById : function(arrayIds){
    return _(this.filter(function(data) {
        ??????? return data.get("id") == eachID;
    }));
},

Thanks!

Answer 1

you could reduce the looping by checking to see if the id of your object is at an index > -1 in the array:

function(arrayIds){
  var models = _.select(collection, function(model){
    return (_.indexOf(arrayIds, model.id) > -1);
  });
  return models;
}

this requires the inclusion of underscore.js in your code, but since you’re already using backbone, you already have that.