Rspec的未定義的方法'孩子」的零：NilClass

Question

我有一個respec測試。我有一個尺寸控制器，只是試圖創建一個新的尺寸。

當我運行測試，我得到這個錯誤，那裏有沒有關於它的谷歌很多信息。

這似乎簡單，但我真的很堅持。任何人都可以幫忙嗎？

1) adding size allow a user to add a size 
    Failure/Error: visit sizes_path 
    ActionView::Template::Error: 
     undefined method `children' for nil:NilClass 

我的測試是如下

require "rails_helper" 
RSpec.feature "adding size" do 

    scenario "allow a user to add a size" do 
     size = create(:size) 
     visit sizes_path 
     expect(page).to have_content("XXLarge") 
    end 

end 

這裏是工廠女孩

FactoryGirl.define do 
    factory :size do 
     title "XXlarge" 
    end 
end 

這裏是我的尺碼控制器

class SizesController < ApplicationController 

    def new 
     @size = Size.new 
    end 

    def create 
    @size = Size.new(size_params) 
    if @size.save 
     redirect_to root_url 
    else 
     render 'new' 
    end 
    end 

    def index 
    @sizes = Size.all 
    end 

private 

    def size_params 
    params.require(:size).permit(:title) 
    end 

end 

這裏是新觀點

<h1>Listing Of Sizes</h1> 

<button type="button" class="btn btn-success"><%= link_to 'Create New Size', new_size_path %></button> 

<table id="example" class="table table-striped table-bordered" cellspacing="0" width="100%"> 
    <thead> 
    <tr> 
     <th>Size</th> 
     <th>Action</th> 
    </tr> 
    </thead> 
    <tbody> 
    <% @sizes.each do |size| %> 
     <tr> 
     <td><%= size.title %></td> 
     <td><%= link_to 'Show', size %><%= link_to 'Edit', edit_size_path(size) %><%= link_to 'Destroy', size, method: :delete, data: { confirm: 'Are you sure?' } %></td> 
     </tr> 
    <% end %> 
    </tbody> 
</table> 

我的佈局頭有孩子。

<header class="navbar navbar-default"> 
    <div class="container-fluid"> 
    <!-- Brand and toggle get grouped for better mobile display --> 
    <div class="navbar-header"> 
     <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> 
     <span class="sr-only">Toggle navigation</span> 
     <span class="icon-bar"></span> 
     <span class="icon-bar"></span> 
     <span class="icon-bar"></span> 
     </button> 
     <a class="navbar-brand" href="/">SAFSY</a> 
    </div> 
    <!-- Collect the nav links, forms, and other content for toggling --> 
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1" > 
     <ul class="nav navbar-nav"> 
     <li class="dropdown"> 
      <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false" >Womens</a> 
      <ul class="dropdown-menu" role="menu"> 
      <% Category.find_by(name:"Women").children.each do |category| %> 
       <li> <%= link_to category.name, category %> </li> 
      <% end %> 
      </ul> 
     </li> 
     <li class="dropdown"> 
      <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false" >Mens</a> 
      <ul class="dropdown-menu" role="menu"> 
      <% Category.find_by(name:"Men").children.each do |category| %> 
       <li> <%= link_to category.name, category %> </li> 
      <% end %> 
      </ul> 
     </li> 
     </ul> 
     <form class="navbar-form navbar-left" role="search"> 
     <div class="form-group"> 
      <input type="text" class="form-control" placeholder="Search"> 
     </div> 
     <button type="submit" class="btn btn-default">Search</button> 
     </form> 
     <ul class="nav navbar-nav navbar-right"> 
     <% if logged_in? %> 
      <li><%= link_to "Dash", users_path %></li> 
      <ul class="nav navbar-nav"> 
      <li class="dropdown"> 
       <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Items<span class="caret"></span></a> 
       <ul class="dropdown-menu"> 
       <li><%= link_to "New Item", new_item_path %></li> 
       <li><%= link_to "Edit Items", user_items_path %></li> 
       <li><a href="#">Mass Upload Items</a></li> 
       <li><a href="#">Upload Item Images</a></li> 
       </ul> 
      </li> 
      </ul> 
      <ul class="nav navbar-nav"> 
      <li class="dropdown"> 
       <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Profile<span class="caret"></span></a> 
       <ul class="dropdown-menu"> 
       <li><%= link_to "View Profile", user_path(current_user) %></li> 
       <li><%= link_to "Edit Profile", edit_user_path(current_user) %></li> 
       </ul> 
      </li> 
      </ul> 
      <li><%= link_to "Messages", users_path %></li> 
      <li class="dropdown"> 
      <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Settings<span class="caret"></span></a> 
      <ul class="dropdown-menu"> 
       <li><a href="#">Edit Money Back Policies</a></li> 
       <li><a href="#">Edit Warranty Policies</a></li> 
      </ul> 
      </li> 
      <li><%= link_to "Log out", logout_path, method: "delete" %></li> 
     <% else %> 
      <li><%= link_to "Log In", login_path %></li> 
      <li><a href="#">Sign Up</a></li> 
     <% end %> 
     </ul> 
    </div><!-- /.navbar-collapse --> 
    </div><!-- /.container-fluid --> 
</header> 

Answer 1

解決方案令人尷尬。我編了13個小時。我被重定向到redirect_to root_url它應該是sizes_path

def create 
    @size = Size.new(size_params) 
    if @size.save 
     redirect_to sizes_path 
    else 
     render 'new' 
    end 
    end