panel/app/controllers/posts_controller.rb

class PostsController < ApplicationController
  before_action :authenticate!

  def index
    @site     = find_site
    @category = session[:category] = params.dig(:category)
    @lang     = params.fetch(:lang, I18n.locale.to_s)
    @posts    = @site.posts_for(@lang)
  end

  def show
    @site = find_site
    @post = find_post(@site)
  end

  def new
    @site = find_site
    @post = Post.new(site: @site, front_matter: { date: Time.now })
  end

  def create
    @site = find_site
    @post = Post.new(site: @site, front_matter: post_params.to_hash)

    if @post.save
      redirect_to site_posts_path(@site)
    else
      render 'posts/new'
    end
  end

  def edit
    @site = find_site
    @post = find_post(@site)
  end

  def update
    p = post_params
    @site = find_site
    @post = find_post(@site)

    @post.update_attributes(p)

    if @post.save
      redirect_to site_posts_path(@site, category: session[:category])
    else
      render 'posts/edit'
    end
  end

  private

  # Solo permitir cambiar estos atributos de cada articulo
  def post_params
    params.require(:post).permit(:title, :date, :content, :slug,
      :cover, :layout, :permalink, :objetivos, :dir,
      :duracion, :formato, :habilidades, :recomendaciones,
      conocimientos: [], sesiones_ejercicios_relacionados: [],
      materiales_requeridos: [], lang: {},
      tags: [], categories: [])
  end
end