I’m new to rails. I need help. I’ve created a form that allows the user to customize an item and click a “submit” button. The “submit” button should redirect user to cart page and add the customized item to cart. However, when the “submit” button is clicked, it directs the user to cart page but does not add the item to cart. I’m stuck and am in need of some assistance.

Customs Controller

before_action :authenticate_user!, except: [:index]
    def new
        @prebuilts = Prebuilt.all
        @custom = Custom.new
      end
    def create
        @custom = Custom.new(params.require(:custom).permit(:built_in_game, :color, :crayon_walls, :entertainment_tablets, :manufacturer, :price, :size))
        if @custom.save
            flash[:success] = "new custom jet created"
            redirect_to cart_url
        else
            flash.now[:error] = 'custom jet creation failed'
            render :new, status: :unprocessable_entity
        end
    end

Cart Controller

    def index
    @cart = Prebuilt.all
    render :index
  end

  def show
    @cart = current_cart
   end

   def add_to_cart
    current_cart.add_item(params[:prebuilt_id])
    redirect_to cart_path(current_cart.id)
    flash[:success] = 'Item successfully updated!'
  end

Customs Form Page

before_action :authenticate_user!, except: [:index]
    def new
        @prebuilts = Prebuilt.all
        @custom = Custom.new
      end
    def create
        @custom = Custom.new(params.require(:custom).permit(:built_in_game, :color, :crayon_walls, :entertainment_tablets, :manufacturer, :price, :size))
        if @custom.save
            flash[:success] = "new custom jet created"
            redirect_to cart_url
        else
            flash.now[:error] = 'custom jet creation failed'
            render :new, status: :unprocessable_entity
        end
    end

Cart Page

<% content_for(:html_title) { 'Junior Jets | Cart' } %>

<h1 style="font-family:'Courier New'"><b>YOUR CART</b></h1>

<div class="cart">

<style>
  #right {
    text-align: right;
    background-color: #ffffff;
  }
</style>

<table id="line_items">
  <tr>
    <th>Product</th>
    <th>Qty</th>
    <th class="price">Unit Price</th>
    <th class="price">Full Price</th>
  </tr>

  <% for item in @cart %>
    <tr class="<%= cycle :odd, :even %>
       <td><%=h item.name %></td>
    </tr>
   <% end %>
  </tr>
</table>


  <div id="right">
  <div class="totals">
    <div class="totals-item">
      <label>Subtotal</label>
      <div class="totals-value" id="cart-subtotal">71.97</div>
    </div>
    <div class="totals-item">
      <label>Tax (10%)</label>
      <div class="totals-value" id="cart-tax">3.60</div>
    </div>
    <div class="totals-item">
      <label>Shipping</label>
      <div class="totals-value" id="cart-shipping">15.00</div>
    </div>
    <div class="totals-item totals-item-total">
      <label>Grand Total</label>
      <div class="totals-value" id="cart-total">90.57</div>
    </div>
  </div>
  <a href="http://localhost:3000/checkout">
  <button>Checkout</button>
  </a>
  </div>

</div>

Routes

  get 'cart', to: 'cart#index', as: 'cart';

  post '/add_to_cart/:prebuilt_id' => 'cart#add_to_cart', :as => 'add_to_cart'

  get 'checkout', to: 'pages#checkout', as: 'checkout';

  get 'confirm', to: 'pages#confirm', as: 'confirm';

########################################################################################################

  # root to: redirect('/jets')

  get 'jets', to: 'jets#index', as: 'jets'
  post 'jets', to: 'jets#create'
  get 'jets/new', to: 'jets#new', as: 'new_jet'
  get 'jets/:id/edit', to: 'jets#edit', as: 'edit_jet'
  get 'jets/:id', to: 'jets#show', as: 'jet'
  patch 'jets/:id', to: 'jets#update'
  delete 'jets/:id', to: 'jets#destroy'

  get 'jets/:jet_id/products', to: 'products#index', as: 'jet_products'
  post 'jets/:jet_id/products', to: 'products#create'
  get 'jets/:jet_id/products/new', to: 'products#new', as: 'new_jet_product'
  get '/jets/:jet_id/products/:id/edit', to: 'products#edit', as: 'edit_jet_product'
  get '/jets/:jet_id/products/:id', to: 'products#show', as: 'jet_product'
  patch '/jets/:jet_id/products/:id', to: 'products#update'
  delete '/jets/:jet_id/products/:id', to: 'products#destroy'

  # get 'jets/:jet_id/reviews', to: 'reviews#index', as: 'jet_reviews'
  # post 'jets/:jet_id/reviews', to: 'reviews#create'
  # get 'jets/:jet_id/reviews/new', to: 'reviews#new', as: 'new_jet_review'
  # get '/jets/:jet_id/reviews/:id/edit', to: 'reviews#edit', as: 'edit_jet_review'
  # get '/jets/:jet_id/reviews/:id', to: 'reviews#show', as: 'jet_review'
  # patch '/jets/:jet_id/reviews/:id', to: 'reviews#update'
  # delete '/jets/:jet_id/reviews/:id', to: 'reviews#destroy'
  get 'prebuilts', to: 'prebuilts#index', as: 'prebuilts'
  get 'prebuilts/:id', to: 'prebuilts#show', as: 'prebuilt'


  get 'customs/new', to: 'customs#new', as: 'new_custom'
  post 'custom', to: 'customs#create'