I don't know why I can't display an image when I create a product using CarrierWave? I also get an error now when I want to edit my product.

I'm using Rails -v 4.2.1 & ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-darwin14.0]

controllers/products_controller.rb

class ProductsController < ApplicationController
  before_filter :find_product, only: [:edit, :show, :update, :destroy]

  def index
    @products = Product.order("created_at DESC")
  end

  def show
  end

  def new
    @product = Product.new
  end

  def create
   @product = Product.new(product_params)

   if @product.save!
      flash[:success] = "Product created!"
      redirect_to products_path
    else
      flash[:danger] = "Error creating product."
      redirect_to new_product_path
    end
  end

  def edit
  end

  def update
    if @product.update_attributes(product_params)
      flash[:success] = "Product Updated!"
      redirect_to products_path
    else
      redirect_to "edit"
    end
  end

  private

  def product_params
    params.require(:product).permit(:name, :description, :price, :images)
  end

  def find_product
    @product = Product.find(params[:product_id])
  end
end

models/product.rb

class Product < ActiveRecord::Base
  mount_uploader :image, ImageUploader
end

uploaders/image_uploader.rb

class ImageUploader < CarrierWave::Uploader::Base
  include CarrierWave::RMagick

  storage :file

  def extension_white_list
    %w(jpg jpeg gif png)
  end

  version :thumb do
    process resize_to_fill: [200, 200]
  end 

  version :small_thumb, from_version: :thumb do
    process resize_to_fill: [20, 20]
  end

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end
end

via Chebli Mohamed