Question

Hi I am trying to set up categories on my e-commerce website using Ruby on Rails, what I want to do is have pages which shows products from a specific category for example I have the category t-shirt so all t-shirts are shown etc… In the backend I am able to set a products category, as I have assigned a foreign key category_id to the products table and the the relationship in the models for the category is it has many products and for the products model it belongs to a category. What would I have to do for showing products from a specific category?

Here is my current code:

Store controller

class StoreController < ApplicationController
  skip_before_filter :authorize

  def index
    @cart = current_cart
    @products = Product = Product.search(params[:search]).paginate(:page => params[:page], :per_page => 6)
  end
end

Category controller

class CategoriesController < ApplicationController
  # GET /categories
  # GET /categories.json
  def index
    @categories = Category.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @categories }
    end
  end

  # GET /categories/1
  # GET /categories/1.json
  def show
    @category = Category.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @category }
    end
  end
end

Answer 1

As far as I can tell, there’s no reason you can’t use the collections Rails provides when you specify a one-to-many association:

@products = @category.products