How do you handle pluralisation in Ember?

Question

Are there any helpers for making templates aware of when to use plural words?

In the example below, how do you make the template output "2 dogs have..."?

The code:

Ember.View.create({dog_count: 2})

The template:

{{dog_count}} (dog has)/(dogs have) gone for a walk.

Answer 1

If you use Ember Data you can use Ember.Inflector.

var inflector = new Ember.Inflector(Ember.Inflector.defaultRules);

inflector.pluralize('person') //=> 'people'

You can register a new helper with:

Handlebars.registerHelper('pluralize', function(number, single) {
  if (number === 1) { return single; }
  else {
    var inflector = new Ember.Inflector(Ember.Inflector.defaultRules);
    return inflector.pluralize(single);
  }
});

More details at http://emberjs.com/api/data/classes/Ember.Inflector.html

Answer 2

I know this is old, but I needed it today, so here goes.

Ember.Handlebars.registerBoundHelper('pluralize', function(number, opts) {
  var single = opts.hash['s'];
  Ember.assert('pluralize requires a singular string (s)', single);
  var plural = opts.hash['p'] || single + 's';
  return (number == 1) ? single : plural;
});

Usage:

{{questions.length}} {{pluralize questions.length s="Question"}}

or

{{dog_count}} {{pluralize dog_count s="dog has" p="dogs have"}} gone for a walk.

The plural (p=) option is only necessary when you don't want the standard +s behavior.