Ember.js. Filtered model

I have a model with tasks, and i wantto get data filtered by status and show result in different lists.

so i have a construction with does't work as i want.

    tasks: Ember.computed(function(){
        var modelTasks = this.get('store').findAll('task');

        return {
            todo: modelTasks.filterBy('status', 'todo'),
            inProgress: modelTasks.filterBy('status', 'inprogress'),
            done: modelTasks.filterBy('status', 'done')
        };
    }),

I'm new, so please, please be tolerant.