cart controller stuff

class CartProductsController < ApplicationController
  def create
    cart_products = current_user.cart.products

    if cart_products.map(&:product_id).include?(params[:product_id])
      cart_product = cart_products.select { |product| product.product_id == params[:product_id] }.first
      cart_product.update(quantity: cart_product.quantity + 1)
      cart_product.save
    else
      CartProduct.create(
        cart_id: params[:cart_id],
        product_id: params[:product_id],
        quantity: params[:quantity]
      )
    end

    redirect_to user_cart_path(current_user)
  end
end

cart page

<div>
  <h1>
    This is the cart for <%= current_user.email %>
  </h1>

  <h2>
    Items:
  </h2>

<div class="products-grid flex flex-wrap justify-center space-x-2 ">
  <% @products.each do |product| %>
    <div class="flex-none mb-5">
      <div>
        <%= link_to image_tag(product.image, class: "product-image mb-2", width: 390, height: 550), product_path(product) %>
      </div>

      <div class="product-details mx-3">
        <div class="flex justify-between">
          <div>
            <%= link_to product.name, product_path(product) %>
          </div>
          <div>
            <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
            <path stroke-linecap="round" stroke-linejoin="round" d="M5 5a2 2 0 012-2h10a2 2 0 012 2v16l-7-3.5L5 21V5z" />
            </svg>
          </div>
        </div>

        <div>
          $<%= product.price %>
        </div>
        <div class="mt-3 text-gray-400 text-sm">
          <%= (1..10).to_a.sample %> colors
        </div>
      </div>
    </div>
  <% end %>
  </div>
</div>