CODEWITHSUNDEEP
ruby-on-railsruby
Onichan
Onichan

Reputation: 4526

Undefined method `add' for Hash

I'm implementing this shopping cart gem, but having problems when I add the item to cart in the controller. I tried executing the code using rails console and it works fine. Not sure why I'm getting this error from the controller.

Error:

enter image description here

products_controller.rb:

helper_method :add_to_cart

  def add_to_cart
   @cart = session[:active_cart]
   @product = Product.find(params[:product_id])
   @cart.add(@product, 99.99)
  end

routes.rb

post '/add_to_cart/:product_id' => 'products#add_to_cart', :as => 'add_to_cart'

views/products/index.html

        <% products.each do |product| %>
        <%= button_to "Add to Cart", add_to_cart_path(:product_id => product.id), :method => :post %>

          <a href="<%= addresses_path(:brand => product.brand.id, :product_id => product.id) %>" class="list-group-item">
            <%= image_tag product.image.url(:square), class: "product-list-group-item" %>
            <%= product.name %>
            <span class="badge">$<%= number_with_precision(product.price, precision: 2) %></span>
          </a>
        <% end %>

Upvotes: 2

Views: 902

Answers (1)

K M Rakibul Islam
K M Rakibul Islam

Reputation: 34338

@cart = session[:active_cart] this is returning a hash and that's why you get the mentioned error when you call this:

@cart.add(@product, 99.99)

Because there is no add method implemented for hash object.

I suggest you to inspect the @cart object in your controller like this:

@cart = session[:active_cart]
puts @cart.inspect
puts @cart.class

and then you will see, it's a hash object and you should be able to extract the required cart object from that hash.

The main issue is to get the correct @cart object from the session. Once you do that, then, it should work :)

Upvotes: 2

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