-ya_wg
Last Updated: February 25, 2016
·
491
· bajalovic
3a4f0f4e84a4f07febcf361dc9d51c41

JSON API Multilang

I started using jsonapi-resources gem in order to create a JSON API according to JSON schema defined by http://jsonapi.org/

I encountered the issue with multi-lang support.

In my Ruby on Rails project I am using globalize gem for multilang model attribute translations.

I started using globalize-accessors gem as well, as they provide getters and setters for translated fields.

This is the JSON response for

GET /api/v1/pages/8

{
  "data": {
    "id": "8",
    "type": "pages",
    "links": {
      "self": "/api/v1/pages/8"
    },
    "attributes": {
      "slug": "testing-translations",
      "translations": {
        "en": {
          "title": "Testing Translations",
          "body": "<strong>Lorem</strong> ipsum dolor sit amet"
        },
        "de": {
          "title": "Testing Übersetzungen",
          "body": null
        },
        "fr": {
          "title": "Essais Traductions",
          "body": null
        }
      }
    }
  }
}

I defined PageResource as

attributes :slug, :translations

def translations
    translations = {}
    Page.globalize_locales.each do |locale|
      translations[locale] = {} unless translations.has_key? locale

      translations[locale]["title"] = @model.send "title_#{locale}"
      translations[locale]["body"] = @model.send "body_#{locale}"
    end
    translations
  end

This will generate a flatten relationship output.

In order to update translations in same manner, I had to enable translations through the strong parameters

def page_params
    params.require(:data).permit(attributes: [:slug, translations: [:locale, :title, :body]])
  end

As this will call translations=(data) on Page instance, I created this method:

class Page < ActiveRecord::Base
  translates :title, :body
  globalize_accessors

  validates :slug, presence: true

  def translations=(data)
    data.each do |o|
      self.send("title_#{o[:locale]}=", o[:title]) unless o[:title].blank?
      self.send("body_#{o[:locale]}=", o[:body]) unless o[:body].blank?
    end

  end
end

That's it.

According the schema, the PATCH (or POST) request would be:

{
    "data": {
        "type": "pages",
        "attributes": {
            "slug": "test-ing",
            "translations": [
                {
                    "locale": "en",
                    "title": "Testing Translations",
                    "body": "Lorem ipsum dolor sit amet"
                },
                {
                    "locale": "de",
                    "title": "Testing Übersetzungen",
                    "body": "Einige Blindtext sollte hier gehen"
                },
                {
                    "locale": "fr",
                    "title": "Essais Traductions"
                    "body": "Certains faux texte devrait aller ici"
                }
            ]
        }
    }
}
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