Fix code

app/controllers/cart_products_controller.rb

@@ -6,17 +6,11 @@ class CartProductsController < ApplicationController
     product = Product.find(params[:product_id])
     if check_quantity?
       add_product_to_cart(product.id.to_i, params[:quantity].to_i )
-      respond_to do |format|
-        format.html { redirect_to cart_path(id: @user_id),
-        notice: 'Products add to cart' }
-        format.json { head :no_content }
-      end
+      redirect_to cart_path(id: @user_id)
+      flash[:success] = 'Products add to cart'
     else
-      respond_to do |format|
-        format.html { redirect_to cart_path(id: @user_id),
-        notice: 'Errors: Quantity' }
-        format.json { head :no_content }
-      end
+      redirect_to cart_path(id: @user_id)
+        flash[:success] = 'Errors: Quantity'
     end
   end
 
@@ -44,9 +38,11 @@ class CartProductsController < ApplicationController
   end
 
   def check_quantity?
-    if ( params[:quantity].to_i && params[:quantity].to_i > 0 )
+    if params[:quantity].to_i > 0
       return true
-    else false
+    else
+      return false
     end
   end
+
 end

app/controllers/carts_controller.rb

 class CartsController < ApplicationController
-  #before_action :find_card, only: [ :create ]
-
-  def update
-  end
-
   def new
     @cart = Cart.new
   end
 
   def create
     total = 0
-
     @cart = Cart.new(cart_params)
     @cart.save
     if current_user
@@ -20,7 +14,6 @@ class CartsController < ApplicationController
       @cart.update(user_id: "", status: "Checkout")
       user_id = 'guess'
     end
-
     if @cart.save
       session[user_id].each do |key, value|
         @product = Product.find(key)
@@ -60,10 +53,6 @@ class CartsController < ApplicationController
     params.require(:cart).permit(:full_name, :email, :address, :phone)
   end
 
-  def find_card
-    @cart = Cart.find(params[:id])
-  end
-
   def update_info_user
     if user_signed_in?
       user = User.find(current_user.id)

app/controllers/products_controller.rb

@@ -6,14 +6,10 @@ class ProductsController < ApplicationController
     @categories = Category.all
   end
 
-  # GET /products/:id
   def show
     @categories = Category.all
   end
 
-  def new
-  end
-
   private
 
   def find_product

app/controllers/static_pages_controller.rb

 class StaticPagesController < ApplicationController
-
-  def home
-  end
-
-  def help
-  end
-
-  def about
-  end
-
 end

app/models/cart.rb

@@ -19,8 +19,4 @@ class Cart < ActiveRecord::Base
   def downcase_email
     self.email = email.downcase
   end
-
-  def check_valid
-  end
-
 end

app/models/cart_product.rb

@@ -7,8 +7,4 @@ class CartProduct < ActiveRecord::Base
   validates :number, presence: true, format: { with: VALID_NUMBER_REGEX }
   validates :price, presence: true, format: { with: VALID_NUMBER_REGEX }
 
-  def total_price
-    product.price * number
-  end
-
 end

app/models/user.rb

@@ -8,11 +8,8 @@ class User < ActiveRecord::Base
   :rememberable, :trackable, :validatable,
   :authentication_keys => [:login]
 
-  VALID_PHONE_REGEX = /\d[0-9]\)*\z/
   VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
 
-  validates :phone, length: { maximum: 12 },
-    format: { with: VALID_PHONE_REGEX }
   validates :username, :presence => true, length: { maximum: 50 }, :uniqueness => { :case_sensitive => false }
   validates :email, presence: true, length: { maximum: 255 },
     format: { with: VALID_EMAIL_REGEX },

app/views/products/show.html.erb

@@ -6,7 +6,7 @@
     <%= image_tag(@product.image, alt: @product.name, class: "img-responsive") %><br>
     <hr>
     <div class="caption-full">
-       <br/>
+      <br/>
       <h4><b><%= @product.name %></b></h4>
       <p><%= simple_format(@product.description) %></p>
       <h3>