each loop from 2 models

controller.rb

class PagesController < ApplicationController
  def store
    @products = Product.all
  end
end

migrations.rb

class CreateProducts < ActiveRecord::Migration
  def change
    create_table :products do |t|
      t.integer :product_category_id
      t.string :name
      t.text :description
      t.decimal :price
      t.string :currency
      t.string :image
      
      t.timestamps null: false
    end
  end
end

class CreateLedConfigurations < ActiveRecord::Migration
  def change
    create_table :led_configurations do |t|
      t.integer :product_id
      t.integer :led_id
      t.integer :series_sum
      t.integer :series_led_count
      t.string :name
      t.integer :wl
      t.integer :quantity

      t.timestamps null: false
    end
  end
end

class CreateLeds < ActiveRecord::Migration
  def change
    create_table :leds do |t|
      t.string :name
      t.integer :wl
      t.decimal :fv
      t.decimal :A
      t.decimal :price
      t.timestamps null: false
    end
  end
end

models.rb

class Product < ActiveRecord::Base
  has_one :led_configuration
  has_many  :leds, through: :led_configuration
end

class LedConfiguration < ActiveRecord::Base
  belongs_to :product
  belongs_to :led
end

class Led < ActiveRecord::Base
  has_many :led_configurations
end

view.html.erb

<% @products.each do |p| %>
.
.
.
  <% p.leds.each do |l| %>
    <tr>
        <td><%= l.wl %></td>
        <td><%= l.price.to_s + "$" %></td>
        <td><%= p.led_configuration.series_led_count %></td> # Here is the problem
        <td><%= p.led_configuration.series_sum %></td> # Here is the problem
      </tr>
  <% end %>
<% end %>