轨道上的红宝石 3 - 黄瓜水豚 对象的未定义方法

Question

我一直在尝试做RSpec Book，黄瓜模拟浏览器部分。问题是它不断为任何对象抛出未定义的方法，这意味着它无法测试应用程序。

测试内容

    When /^I create a movie Caddyshack in the Comedy genre$/ do
      visit movies_path
      click_link "Add Movie"
      click_button "Save"
    end

问题是它不会使用视图呈现表单，从而为 ActiveRecord 对象引发未定义的错误。

视图

    <%= form_for(@movie) do |f| %>
      <table>
        <tr>
          <th><%= f.label :name %></th>
          <td><%= f.text_field :name, :id => "title" %></td>
        </tr>
      </table>
      <div class="actions">
        <%= f.submit %>
      </div>
    <% end %>

控制器

    def index
      @movies = Movie.all
      respond_to do |format|
        format.html # index.html.erb
        format.json { render json: @movies }
      end
    end
    def new
      @movie = Movie.new
      respond_to do |format|
        format.html # new.html.erb
        format.json { render json: @movie }
      end
    end

模型

    class Movie < ActiveRecord::Base
      attr_accessible :showtime_date, :showtime_time, :name
      has_many :genres
      def showtime
        "#{formatted_date} (#{formatted_time})"
      end
      def formatted_date
        showtime_date.strftime("%B %d, %Y")
      end
      def formatted_time
        format_string = showtime_time.min.zero? ? "%l%p" : "%l:%M%p"
        showtime_time.strftime(format_string).strip.downcase
      end
    end

我的宝石文件

    source 'https://rubygems.org'
    gem 'rails', '3.2.8'
    gem 'sqlite3'
    gem 'awesome_print'
    group :assets do
      gem 'sass-rails',   '~> 3.2.3'
      gem 'coffee-rails', '~> 3.2.1'
      gem 'uglifier', '>= 1.0.3'
    end
    gem 'jquery-rails'
    group :development, :test do
      gem "rspec-rails", ">= 2.0.0"
    end
    group :test do
      gem 'database_cleaner'
      gem "cucumber-rails", ">= 0.3.2"
    end

最后，水豚一直告诉我的错误

    When I create a movie Caddyshack in the Comedy genre # features/step_definitions/genre_steps.rb:6
      undefined method `name' for #<Movie:0x00000102e36590> (ActionView::Template::Error)
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/activemodel-3.2.8/lib/active_model/attribute_methods.rb:407:in `method_missing'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/attribute_methods.rb:149:in `method_missing'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_view/helpers/form_helper.rb:1161:in `value_before_type_cast'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_view/helpers/form_helper.rb:1149:in `value_before_type_cast'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_view/helpers/form_helper.rb:1043:in `block in to_input_field_tag'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_view/helpers/form_helper.rb:1043:in `fetch'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_view/helpers/form_helper.rb:1043:in `to_input_field_tag'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_view/helpers/form_helper.rb:692:in `text_field'
      /Users/Dono/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.8/lib/action_view/helpers/form_helper.rb:1284:in `text_field'
      ./app/views/movies/_form.html.erb:5:in `block in _app_views_movies__form_html_erb___3270649907202408240_2157451180'

我的功能/支持/环境.rb

    require 'cucumber/rails'
    require 'rspec'
    Capybara.default_selector = :css
    ActionController::Base.allow_rescue = false
    begin
      DatabaseCleaner.strategy = :transaction
    rescue NameError
      raise "You need to add database_cleaner to your Gemfile (in the :test group) if you wish to use it."
    end
    Cucumber::Rails::Database.javascript_strategy = :truncation

然而，名称方法已定义，页面在我的浏览器中呈现良好。知道可能出现什么问题吗？

Answer 1

正如RobertH在评论中所说，我没有设置测试数据库。我需要做的就是跑步

    rake db:test:prepare