rspec undefined method `id' for nil:NilClass - ruby-on-rails

Question

require 'rails_helper'
feature "comment" do
given(:current_user) do
create(:user)
end
given(:undertaking) do
create(:undertaking)
end
background do
login_as(current_user)
end
scenario "can create comment" do
#below two because undertaking = user_id:2 & asking_id:1
create(:user)
create(:asking)
p undertaking
p Asking.find(1)
p User.find(2)
p User.find(1)
p Undertaking.all
visit undertaking_path(undertaking)
expect(current_path).to eq undertaking_path(1)
within("form#undertake-form-test") do
fill_in "content" , with: "heyheyhey"
end
click_button 'Send'
expect(page).to have_content 'heyheyhey'
end
end
This is spec/features/comment_spec.rb.
and this below is result command rspec.
#<Undertaking id: 1, title: "MyString", content: "MyText", result: false, user_id: 2, asking_id: 1, created_at: "2016-12-13 15:07:08", updated_at: "2016-12-13 15:07:08">
#<Asking id: 1, content: "MyText", fromlang: "MyString", tolang: "MyString", usepoint: 1, finished: false, title: "MyString", deadline: nil, user_id: 1, created_at: "2016-12-13 15:07:08", updated_at: "2016-12-13 15:07:08">
#<User id: 2, email: "shiba.hayato2#docomo.ne.jp", created_at: "2016-12-13 15:07:08", updated_at: "2016-12-13 15:07:08", provider: nil, uid: nil, name: "Shiruba", occupation: "大学生", age: 10, sex: "男性", content: "heyheyheyeheyeheye", skill: "日本語検定3級", picture: "/assets/default_user.jpg", point: 500, country: "Japan", language1: "Japanese", language2: "Korea", language3: "English">
#<User id: 1, email: "shiba.hayato1#docomo.ne.jp", created_at: "2016-12-13 15:07:08", updated_at: "2016-12-13 15:07:08", provider: nil, uid: nil, name: "Shiruba", occupation: "大学生", age: 10, sex: "男性", content: "heyheyheyeheyeheye", skill: "日本語検定3級", picture: "/assets/default_user.jpg", point: 500, country: "Japan", language1: "Japanese", language2: "Korea", language3: "English">
#<ActiveRecord::Relation [#<Undertaking id: 1, title: "MyString", content: "MyText", result: false, user_id: 2, asking_id: 1, created_at: "2016-12-13 15:07:08", updated_at: "2016-12-13 15:07:08">]>
F
Failures:
1) comment can create comment
Failure/Error: <%= #undertaking.id %>
ActionView::Template::Error:
undefined method `id' for nil:NilClass
and this below is undertaking_controller.rb.
class UndertakingController < ApplicationController
def show
#undertaking=Undertaking.find(params[:id])
#comment=Comment.new do |c|
c.user=current_user
end
end
end
and this below is undertaking/show.html.erb.
<%= #undertaking.id %>
Why do I have the error? Why #undertaking is nil in view although Undertaking.first is not nil in spec/features/comment_spec.rb?Please help me.

Answer 1

I think it has to do with the naming used for your controller . The convention is undertakings/show.html.erb for the view instead of undertaking/show.html.erb . I would also use
class UndertakingsController < ApplicationController
instead of
class UndertakingController < ApplicationController
Finally I would check that all my routes also have the correct naming. Hope that helps. Good luck