gistfile1.js

DetalheAnuncioIndexController = RouteController.extend({
	waitOn: function () {
		Meteor.subscribe('users');
		return Meteor.subscribe('listarAnuncios');
	},

	data: function () {
		return Anuncios.findOne(this.params.id);
	},

	onBeforeAction: function () {
		if (Anuncios.findOne(this.params.id)) {
			Session.set('selectedDays', Anuncios.findOne(this.params.id).unavailableDays);
		}
		this.next();
	},

	action: function () {
		this.render();
	}
});

gistfile2.handlebars

<template name="bla">
  {{#if hasAccessories accessories}}
    AQUI
  {{else}}
    ALI
  {{/if}}
</template>