Rails i18n - 如何翻译模型的枚举

Question

I've got the following model:

class Person < ActiveRecord::Base
  enum gender: [:female, :male]
  ...
end

Then I added the selection of the gender to its form, like this:

<%= form_for ([@person]) do |f| %>
  ...
  <div class="form-group">
    <%= f.collection_radio_buttons :gender, Person.genders, :first, :first %>
  </div>
  ...
<% end %>

But instead of displaying the constant as a string I want to translate it to Portuguese.

I already tried to add it to the pt.yml file under people but didn't work.

pt:
 activerecord:
   attributes:
     female: Feminino
     male: Mascúlino

I know this question is very similar to How to use i18n with Rails 4 enums but that question is already marked as answered and I'm searching for a better and simpler solution...

Thank you for taking your time to help me :)

Answer 1

After reading How to use i18n with Rails 4 enums answers more carefully I came to this solution:

1. According rails guides - "In the event you need to access nested attributes within a given model, you should nest these under model/attribute at the model level of your translation file" -

the yml file should look like this:

pt:
 activerecord:
   attributes:
     person/gender:
       female: Feminino
       male: Mascúlino

2. We need to create a method to return a translated enum since there isn't any method capable of translating an entire enum at once. Rails just has the method to translate a value given a key, ie People.human_attribute_name("gender.female").

Ok, we'll create a new method but where should we put it?

I think Helpers are the best place to put it because I'm changing the enum values in order to easily attach them to the form collection , although most of the answers suggested to put it in the Models .

Now my person_helper.rb looks like this:

def human_attribute_genders
  Hash[Person.genders.map { |k,v| [k, Person.human_attribute_name("gender.#{k}")] }]
end

And my view :

<%= f.collection_radio_buttons :gender, human_attribute_genders, :first, :second %>

Pretty simple and it works just fine!

If anyone has any suggestion to improve my solution I would be happy to hear it from you :)

For example, I could extract the method to application_helper.rb like this:

def human_attribute_enum(model_name, enum_attr, attr_name)
  Hash[enum_attr.map { |k,v| [k, I18n.t("activerecord.attributes.#{model_name}/#{attr_name}.#{k}")] }]
end

But it'd require passing a lot of parameters in the view ...