TokiTranslate/app/controllers/dictionary_controller.rb

class DictionaryController < ApplicationController
  def index
    @parts_of_speech = PartOfSpeech.where(language_id: active_language)
    @words = Word.all
  end

  def show
    @letter = params[:id]
    @words = Word.where('substr(word, 1, 1) = ?', @letter)
    @language = active_language

    #@words.joins(:definitions).where(definitions: { language_id: active_language })
  end

  private
  def active_language 
    cookies[:active_language_id] || Language.where(name: "English")
  end
end