Order Management System Modes

brand.rb

class Brand < ActiveRecord::Base
  has_many :products
  validates :name, presence: true
  has_attached_file :logo, :styles => { :medium => "300x300>", :thumb => "100x100>" }
  has_attached_file :header, styles: {medium: "x200"}
end

brands_controller.rb

class BrandsController < ApplicationController

  def new
    @brand = Brand.new
    @brands = Brand.all
  end
  
  def create
    @brand = Brand.new(brand_params)
    if @brand.save
      redirect_to @brand
    else
      render 'new'
    end
  end
  
  def show
    @brands = Brand.all
    @brand = Brand.find(params[:id])
  end 
  
  def edit
    @brand = Brand.find(params[:id])
  end 
  
  def update
    @brand = Brand.find(params[:id])
    @brand.update(brand_params)
    redirect_to @brand
  end

  def index
    @brands = Brand.all
  end
  
  def add_products
    @brands = Brand.all
    @brand = Brand.find(params[:id])
  end 

  private #!!!!!!!!!!!!!!!!!
  
  def brand_params
    params.require(:brand).permit(:name, :address, :contact, :phone_numer, :description, :logo, :header)
  end
  
end

order.rb

class Order < ActiveRecord::Base
  belongs_to :user
  has_many :order_line_items
  accepts_nested_attributes_for :order_line_items
end

order_line_item.rb

class OrderLineItem < ActiveRecord::Base
  belongs_to :product
  belongs_to :order
 
  def product
    return Product.find(self.product_id)
  end
end

orders-new.html.erb

<%= form_tag("/orders?brand=#{@brand.id}", method: "post" ) do %>
<h1><%= @brand.name %> Order Form</h1>
<table class="table">
  <tr>
    <th>Name</th>
    <th>sku</th>
    <th>MSRP</th>
    <th>Size Info</th>
    <th>Quantity</th>
    <th>Subtotal</th>
  </tr>

  <% @brand.products.each do |product| %>
    <tr class="targetfields">
      <td><%= product.name %></td>
      <td><%= product.sku %></td>
      <td>$<span class="rate"><%=product.price_retail%></span></td>
      <td style="overflow:hidden;" ><%= product.size_info %></td>
      <td><%= number_field_tag product.id, product.name %></td>
      <td class="subtotal">$0.00</td>
    </tr>
  <% end %>
<td id="total"></td>
</tr>
</table>
<button id="submit" class="btn btn-large" type="submit" >
  Submit
</button>
<% end %>

orders_controller.rb

class OrdersController < ApplicationController
  def new 
    @brand = Brand.find(params[:id])
  end

  def create
    @brand = Brand.find(params[:brand])
    @order = Order.new(user: current_user, brand_id: params[:brand])
    
    @brand.products.each do |x|
      order_line_item_qty = params[x.id.to_s.to_sym].to_i
      if order_line_item_qty != 0
        @order.order_line_items.build(product: x, quantity: order_line_item_qty)
      end
    end

    @order.save!
    redirect_to @order
  end
  
  def index
    @orders = current_user.orders
  end

  def show
    @order = Order.find(params[:id])
  end
  
  def edit
    @order = Order.find(params[:id])
  end
end

orders_with_fields_for-new.html.erb

<%= form_tag("/orders?brand=#{@brand.id}", method: "post" ) do %>
<h1><%= @brand.name %> Order Form</h1>
<table class="table">
  <tr>
    <th>Name</th>
    <th>sku</th>
    <th>MSRP</th>
    <th>Size Info</th>
    <th>Quantity</th>
    <th>Subtotal</th>
  </tr>

  <% @brand.products.each do |product| %>
    <tr class="targetfields">
      <td><%= product.name %></td>
      <td><%= product.sku %></td>
      <td>$<span class="rate"><%=product.price_retail%></span></td>
      <td style="overflow:hidden;" ><%= product.size_info %></td>
      <td><%= number_field_tag product.id, product.name %></td>
      <td class="subtotal">$0.00</td>
    </tr>
  <% end %>
<td id="total"></td>
</tr>
</table>
<button id="submit" class="btn btn-large" type="submit" >
  Submit
</button>
<% end %>

product.rb

class Product < ActiveRecord::Base
  belongs_to :brand 
  validates :name, presence: true
  validates :brand_id, presence: true

  def self.import(file, brand_id) 
    CSV.foreach(file.path, headers: true) do |row|
      a = row.to_hash
      a[:brand_id] = brand_id
      Product.create! a
    end
  end
end

products_controller.rb

class ProductsController < ApplicationController
  def new
    @product = Product.new
  end

  def create
    @brand = Brand.find(params[:brand_id])
    if params[:product][:file] != nil
      Product.import(params[:product][:file], params[:brand_id])
    else
      @product = @brand.products.create(params[:product].permit!)
    end
    redirect_to @brand
  end
end