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Ruby on Rails: related models functional test error

1.9.2-p290 :015 >   a = Allergy.all

  Allergy Load (0.4ms)  SELECT "allergies".* FROM "allergies"

 => [#<Allergy id: 1, name: "Milk", desc: "Allergic to milk", created_at: "2012-01-08 16:38:55", updated_at: "2012-01-09 11:48:20", patient_id: 1>, #<Allergy id: 2, name: "Blah", desc: "Test", created_at: "2012-01-09 12:20:48", updated_at: "2012-01-09 12:20:48", patient_id: 2>]

1.9.2-p290 :016 > a[0]

 => #<Allergy id: 1, name: "Milk", desc: "Allergic to milk", created_at: "2012-01-08 16:38:55", updated_at: "2012-01-09 11:48:20", patient_id: 1>

1.9.2-p290 :017 > a[0].patient.full_name

  Patient Load (0.5ms)  SELECT "patients".* FROM "patients" WHERE "patients"."id" = 1 LIMIT 1

 => "Test Full Name"

1.9.2-p290 :018 >

       

class AllergiesController < ApplicationController

  # GET /allergies

  # GET /allergies.json

  def index

    @allergies = Allergy.all

 

    respond_to do |format|

      format.html # index.html.erb

      format.json { render json: @allergies }

    end

  end

 

  # GET /allergies/1

  # GET /allergies/1.json

  def show

    @allergy = Allergy.find(params[:id])

 

    respond_to do |format|

      format.html # show.html.erb

      format.json { render json: @allergy }

    end

  end

  ...

       

class Allergy < ActiveRecord::Base

  validates :name, :presence => true

  belongs_to :patient

end

       

class Patient < ActiveRecord::Base

  validates :first_name, :last_name, :dob, :presence => true

  has_many :allergies

 

  def age

    now = Time.now.utc.to_date

    now.year - dob.year - ((now.month > dob.month || (now.month == dob.month && now.day >= dob.day)) ? 0 : 1)

  end

 

  def full_name

    first_name

  end

end

       

require 'test_helper'

 

class AllergiesControllerTest < ActionController::TestCase

  setup do

    @allergy = allergies(:one)

    @allergy.patient = patients(:one)

  end

 

  test "should get index" do

    get :index

    assert_response :success

    assert_not_nil assigns(:allergies)

  end

  ...

       

# For Allergy

one:

  name: MyString

  desc: MyText

  patient_id: 1

 

two:

  name: MyString

  desc: MyText

  patient_id: 1

 

#For Patient

one:

  first_name: Jose

  last_name: Rizal

  middle_name: H

  dob: 2009-10-29

 

two:

  first_name: MyString

  last_name: MyString

  middle_name: MyString

  dob: 1982-02-11

       

AllergiesControllerTest:

     PASS should create allergy (0.22s)

     PASS should destroy allergy (0.01s)

     PASS should get edit (0.13s)

    ERROR should get index (0.14s)

          ActionView::Template::Error: undefined method `full_name' for nil:NilClass

          /Users/wenbert/.rvm/gems/ruby-1.9.2-p290/gems/activesupport-3.1.3/lib/active_support/whiny_nil.rb:48:in `method_missing'

 

     PASS should get new (0.02s)

     PASS should show allergy (0.02s)

     PASS should update allergy (0.02s)

       

--- !ruby/object:Allergy

attributes:

  id: 298486374

  name: MyString

  desc: MyText

  created_at: 2012-01-09 14:28:21.000000000Z

  updated_at: 2012-01-09 14:28:21.000000000Z

  patient_id: 1

  Patient Load (0.2ms)  SELECT "patients".* FROM "patients" WHERE "patients"."id" = 1 LIMIT 1

--- !!null

...

       

allergy_one:

  name: ...

  patient: patient_one

 

allergy_two:

  name: ...

 

patient_one:

  name: ..