```ruby
class Editor::CategoriesController < Editor::ApplicationController
  def index
    @categories = categories
  end

  def show
    @category = categories.find(params[:id])
  end

  def new
    @category = categories.build
  end

  def create
    @category = categories.build(category_params)

    if @category.save
      redirect_to [:editor, @category], notice: 'カテゴリが作成されました'
    else
      render :new
    end
  end

  def edit
    @category = categories.find(params[:id])
  end

  def update
    @category = categories.find(params[:id])

    if @category.update(category_params)
      redirect_to [:editor, @category], notice: 'カテゴリが更新されました'
    else
      render :edit
    end
  end

  def destroy
    @category = categories.find(params[:id])

    @category.destroy

    redirect_to editor_categories_url, notice: 'カテゴリが削除されました'
  end

  private

  def categories
    current_site.categories
  end

  def category_params
    params.require(:category).permit(
      :name,
      :description,
      :slug,
      :order
    )
  end
end
```

Order by category.order on /editor/categories
user
```ruby
class Editor::CategoriesController < Editor::ApplicationController
  def index
    @categories = categories.order(:order)
  end

  def show
    @category = categories.find(params[:id])
  end

  def new
    @category = categories.build
  end

  def create
    @category = categories.build(category_params)

    if @category.save
      redirect_to [:editor, @category], notice: 'カテゴリが作成されました'
    else
      render :new
    end
  end

  def edit
    @category = categories.find(params[:id])
  end

  def update
    @category = categories.find(params[:id])

    if @category.update(category_params)
      redirect_to [:editor, @category], notice: 'カテゴリが更新されました'
    else
      render :edit
    end
  end

  def destroy
    @category = categories.find(params[:id])

    @category.destroy

    redirect_to editor_categories_url, notice: 'カテゴリが削除されました'
  end

  private

  def categories
    current_site.categories
  end

  def category_params
    params.require(:category).permit(
      :name,
      :description,
      :slug,
      :order
    )
  end
end
```
assistant