card.rb

class Card < ActiveRecord::Base
  attr_accessor :card_name, :card_type
end

cards_controller.rb

class CardsController < ApplicationController
  # GET /cards
  # GET /cards.json
  def index
    @cards = Card.all

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

  # GET /cards/1
  # GET /cards/1.json
  def show
    @card = Card.find(params[:id])

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

  # GET /cards/new
  # GET /cards/new.json
  def new
    @card = Card.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @card }
    end
  end

  # GET /cards/1/edit
  def edit
    @card = Card.find(params[:id])
  end

  # POST /cards
  # POST /cards.json
  def create
    @card = Card.new(params[:card])

    respond_to do |format|
      if @card.save
        format.html { redirect_to @card, notice: 'Card was successfully created.' }
        format.json { render json: @card, status: :created, location: @card }
      else
        format.html { render action: "new" }
        format.json { render json: @card.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /cards/1
  # PUT /cards/1.json
  def update
    @card = Card.find(params[:id])

    respond_to do |format|
      if @card.update_attributes(params[:card])
        format.html { redirect_to @card, notice: 'Card was successfully updated.' }
        format.json { head :ok }
      else
        format.html { render action: "edit" }
        format.json { render json: @card.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /cards/1
  # DELETE /cards/1.json
  def destroy
    @card = Card.find(params[:id])
    @card.destroy

    respond_to do |format|
      format.html { redirect_to cards_url }
      format.json { head :ok }
    end
  end
end

schema.rb

ActiveRecord::Schema.define(:version => 20111223032829) do

  create_table "cards", :force => true do |t|
    t.string   "card_name"
    t.string   "card_type"
    t.datetime "created_at"
    t.datetime "updated_at"
  end
end

show.html.haml

%p#notice= notice

%p
  %b Name:
  = @card.card_name
%p
  %b Type:
  = @card.card_type

= link_to 'Edit', edit_card_path(@card)
\|
= link_to 'Back', cards_path