You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: categories_controller.rb
    path of file: ./repos/SlideHub/app/controllers/admin
    
    the code of the file until where you have to start completion: module Admin
  class CategoriesController < Admin::BaseController
    before_action :
    
    def edit; end

    def update
      @category.assign_attributes(category_params)
      if @category.update(category_params)
        redirect_to admin_categories_path, notice: t(:category_was_updated)
      else
        render :edit
      end
    end