Intermediate Rails - HW week 1

Gemfile

@@ -38,3 +38,15 @@ gem 'spring',        group: :development
 # Use debugger
 # gem 'debugger', group: [:development, :test]
 
+gem 'devise' # login/logout
+gem 'bootstrap-sass' # make beautiful front end
+gem 'simple_form'
+
+# upload image
+gem 'carrierwave'
+
+# belongs to carrierwave, it has to be installed with carrierwave.
+# used to resize the image when uploading.
+gem 'mini_magick' 
+
+gem 'better_errors',  group: :development

Gemfile.lock

@@ -28,14 +28,32 @@ GEM
       thread_safe (~> 0.1)
       tzinfo (~> 1.1)
     arel (5.0.1.20140414130214)
+    bcrypt (3.1.7)
+    better_errors (1.1.0)
+      coderay (>= 1.0.0)
+      erubis (>= 2.6.6)
+    bootstrap-sass (3.2.0.0)
+      sass (~> 3.2)
     builder (3.2.2)
+    carrierwave (0.10.0)
+      activemodel (>= 3.2.0)
+      activesupport (>= 3.2.0)
+      json (>= 1.7)
+      mime-types (>= 1.16)
+    coderay (1.1.0)
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.0)
     coffee-script (2.2.0)
       coffee-script-source
       execjs
     coffee-script-source (1.7.0)
+    devise (3.2.4)
+      bcrypt (~> 3.0)
+      orm_adapter (~> 0.1)
+      railties (>= 3.2.6, < 5)
+      thread_safe (~> 0.1)
+      warden (~> 1.2.3)
     erubis (2.7.0)
     execjs (2.2.0)
     hike (1.2.3)
@@ -51,8 +69,11 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)
+    mini_magick (3.7.0)
+      subexec (~> 0.2.1)
     minitest (5.3.4)
     multi_json (1.10.1)
+    orm_adapter (0.5.0)
     polyglot (0.3.5)
     rack (1.5.2)
     rack-test (0.6.2)
@@ -84,6 +105,9 @@ GEM
     sdoc (0.4.0)
       json (~> 1.8)
       rdoc (~> 4.0, < 5.0)
+    simple_form (3.0.2)
+      actionpack (~> 4.0)
+      activemodel (~> 4.0)
     spring (1.1.3)
     sprockets (2.11.0)
       hike (~> 1.2)
@@ -95,6 +119,7 @@ GEM
       activesupport (>= 3.0)
       sprockets (~> 2.8)
     sqlite3 (1.3.9)
+    subexec (0.2.3)
     thor (0.19.1)
     thread_safe (0.3.4)
     tilt (1.4.1)
@@ -108,17 +133,25 @@ GEM
     uglifier (2.5.0)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
+    warden (1.2.3)
+      rack (>= 1.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  better_errors
+  bootstrap-sass
+  carrierwave
   coffee-rails (~> 4.0.0)
+  devise
   jbuilder (~> 2.0)
   jquery-rails
+  mini_magick
   rails (= 4.1.0)
   sass-rails (~> 4.0.3)
   sdoc (~> 0.4.0)
+  simple_form
   spring
   sqlite3
   turbolinks

app/assets/javascripts/admin/products.js.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/javascripts/application.js

@@ -13,4 +13,6 @@
 //= require jquery
 //= require jquery_ujs
 //= require turbolinks
-//= require_tree .
+//= require bootstrap/dropdown
+//= require bootstrap/alert
+//= require_tree .

app/assets/javascripts/products.js.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/stylesheets/admin/products.css.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the admin::products controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/assets/stylesheets/application.css

@@ -12,4 +12,6 @@
  *
  *= require_tree .
  *= require_self
+ *= require bootstrap
+ *= require products
  */

app/assets/stylesheets/products.css.scss

@@ -0,0 +1,12 @@
+// Place all the styles related to the products controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/
+
+.product-price{
+  padding-top: 20px;
+  padding-bottom: 20px;
+
+  font-size: 30px;
+  font-weight: bold;
+  color: #ff007c;
+}

app/controllers/admin/products_controller.rb

@@ -0,0 +1,56 @@
+class Admin::ProductsController < ApplicationController
+
+  before_action :authenticate_user!
+  before_action :admin_required
+
+  def index
+    @products = Product.all
+  end
+
+
+  def new
+    @product = Product.new
+    @photo = @product.photos.new
+  end
+
+
+  def show
+    @product = Product.find(params[:id])
+  end
+
+
+  def create
+    @product = Product.new(product_params)
+
+    if @product.save
+      redirect_to admin_products_path
+    else
+      render :new
+    end
+  end
+
+
+  def edit
+    @product = Product.find(params[:id])
+  end
+
+
+  def update
+    @product = Product.find(params[:id])
+
+    if @product.update(product_params)
+      redirect_to admin_products_path
+    else
+      render :edit
+    end
+  end
+
+
+  private
+
+
+  def product_params
+    params.require(:product).permit(:title, :description, :quantity, :price, :photos_attributes => [:image] )
+  end
+
+end

app/controllers/application_controller.rb

@@ -2,4 +2,11 @@ class ApplicationController < ActionController::Base
   # Prevent CSRF attacks by raising an exception.
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
+
+  def admin_required
+    if !current_user.admin?
+      redirect_to root_path, alert: 'you are not admin!!'
+    end
+  end
+
 end

app/controllers/products_controller.rb

@@ -0,0 +1,11 @@
+class ProductsController < ApplicationController
+
+  def index
+    @products = Product.order("id DESC")
+  end
+
+  def show
+    @product = Product.find(params[:id])
+  end
+
+end

app/helpers/admin/products_helper.rb

@@ -0,0 +1,2 @@
+module Admin::ProductsHelper
+end

app/helpers/products_helper.rb

@@ -0,0 +1,37 @@
+module ProductsHelper
+
+  def render_product_photo(photo, size = "thumb")
+    if photo.present?
+      image_url = photo.image.send(size).url
+    else
+
+      case size
+      when :medium
+        volume = "300x300"
+      else
+        volume = "200x200"
+      end
+
+      image_url = "http://placehold.it/#{volume}&text=No Pic"
+    end
+
+    image_tag(image_url, :class => "thumbnail")
+  end
+
+  def render_product_name(product)
+    product.title
+  end
+
+  def render_product_desc(product)
+    simple_format(product.description)
+  end
+
+  def render_product_quantity(product)
+    product.quantity
+  end
+
+  def render_product_price(product)
+    product.price
+  end
+
+end

app/models/photo.rb

@@ -0,0 +1,7 @@
+class Photo < ActiveRecord::Base
+
+  belongs_to :product
+
+  mount_uploader :image, ImageUploader
+
+end

app/models/product.rb

@@ -0,0 +1,13 @@
+class Product < ActiveRecord::Base
+
+  has_many :photos
+  accepts_nested_attributes_for :photos
+
+  validates :title, :presence => true
+  validates :quantity, :presence => true
+
+  def default_photo
+    photos.first
+  end
+
+end

app/models/user.rb

@@ -0,0 +1,11 @@
+class User < ActiveRecord::Base
+  # Include default devise modules. Others available are:
+  # :confirmable, :lockable, :timeoutable and :omniauthable
+  devise :database_authenticatable, :registerable,
+         :recoverable, :rememberable, :trackable, :validatable
+
+  def admin?
+    is_admin
+  end
+
+end

app/uploaders/image_uploader.rb

@@ -0,0 +1,61 @@
+# encoding: utf-8
+
+class ImageUploader < CarrierWave::Uploader::Base
+
+  # Include RMagick or MiniMagick support:
+  # include CarrierWave::RMagick
+  include CarrierWave::MiniMagick
+
+  # Choose what kind of storage to use for this uploader:
+  storage :file
+  # storage :fog
+
+  # Override the directory where uploaded files will be stored.
+  # This is a sensible default for uploaders that are meant to be mounted:
+  def store_dir
+    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
+  end
+
+  process :resize_to_fit => [800, 800]
+
+  version :thumb do
+    process :resize_to_fill => [200,200]
+  end
+
+  version :medium do
+    process :resize_to_fill => [400,400]
+  end
+
+  # Provide a default URL as a default if there hasn't been a file uploaded:
+  # def default_url
+  #   # For Rails 3.1+ asset pipeline compatibility:
+  #   # ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
+  #
+  #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')
+  # end
+
+  # Process files as they are uploaded:
+  # process :scale => [200, 300]
+  #
+  # def scale(width, height)
+  #   # do something
+  # end
+
+  # Create different versions of your uploaded files:
+  # version :thumb do
+  #   process :resize_to_fit => [50, 50]
+  # end
+
+  # Add a white list of extensions which are allowed to be uploaded.
+  # For images you might use something like this:
+  # def extension_white_list
+  #   %w(jpg jpeg gif png)
+  # end
+
+  # Override the filename of the uploaded files:
+  # Avoid using model.id or version_name here, see uploader/store.rb for details.
+  # def filename
+  #   "something.jpg" if original_filename
+  # end
+
+end

app/views/admin/products/edit.html.erb

@@ -0,0 +1,12 @@
+<%= simple_form_for [:admin, @product] do |f| %>
+
+  <%= f.input :title %>
+  <%= f.input :description %>
+  <%= f.input :quantity %>
+  <%= f.input :price %>
+
+  <%= f.submit "Submit", :disable_with => 'Submiting...' %> 
+
+<% end %>
+<br>
+<%= link_to 'Cancel', admin_products_path %>