Rspec - RuntimeError：被调用的ID为零，这将错误地为4

Question

我现在正在进行Rspec测试create行动ItemsController，但是我对这个错误有麻烦。 （有模型作为Item，Auction，Bid，User）

的create方法如下

# POST /items 
# POST /items.json 
def create 
    @item = Item.new(params[:item]) 
    @item.user_id = current_user.id 

    respond_to do |format| 
    if @item.save 
     format.html { redirect_to @item, notice: 'Item was successfully created.' } 
     format.json { render json: @item, status: :created, location: @item } 
    else 
     format.html { render action: "new" } 
     format.json { render json: @item.errors, status: :unprocessable_entity } 
    end 
    end 
    @elapsed_seconds =(((params[:item][:days].to_i * 24)+params[:item][:hours].to_i)*60+params[:item][:minutes].to_i)*60 
    @auction = Auction.create(:item_id => @item.id, :highest_bid_id => 0, :exp_time =>    
    @item.created_at+ @elapsed_seconds.seconds, :suspend => 0, :user_id => @current_user.id, :extend_bit => 0) 
    @item.update_attributes(:auction_id => @auction.id) 
    @item_id = @item.id 
    @auction_id = @auction.id 
    @t1 = Thread.new{ 
    @timer = Timers.new 
    @bid_timer = @timer.after(@elapsed_seconds){ 
     if Auction.find_by_id(@auction_id).suspend != 1 
      buy 
     end 
    } 
    @timer.wait 
    } 

end 

def buy 
    if Auction.find_by_id(@auction_id).extend_bit == 1 
    extendtimer 
    else 
    if Auction.find_by_id(@auction_id).highest_bid_id != 0 
     Item.find_by_auction_id(@auction_id).update_attributes(:sold => 1, :sold_to => Bid.find_by_id(Auction.find_by_id(@auction_id).highest_bid_id).user_id) 
     MyMailer.auction_winner_email(Auction.find_by_id(@auction_id)).deliver 
    else 
     Item.find_by_auction_id(@auction_id).update_attributes(:sold => 0, :sold_to => 0) 
     MyMailer.no_bids_email(Auction.find_by_id(@auction_id)).deliver 
    end 
    @t1.join 
    end 
end 

def extendtimer 
    Auction.find_by_id(@auction_id).update_attributes(:extend_bit => 0) 
    @exp = Auction.find_by_id(@auction_id).exp_time + 2.minutes 
    Auction.find_by_id(@auction_id).update_attributes(:exp_time => @exp) 
    @min = Item.find_by_id(@item_id).minutes + 2 
    Item.find_by_id(@item_id).update_attributes(:minutes => @min) 
    @timer2 = Timers.new 
    @extend_timer = @timer2.after(120){ buy } 
    @timer2.wait 
end 

我的Rspec的是如下。这个测试的意图是在第一对象被做使用（如current_user，auction“项目). Then also stubs are declared. (such as Auction.stub（：find_by_id）.and_return（拍卖）`）

require 'spec_helper' 

describe ItemsController do 

    let(:valid_session) { {} } 

    describe "POST create" do 
    it "" do 
     #declare the objects and stubs 
     current_user = User.new(id:'1') 
     current_user.save 
     auction = Auction.new(id:'1',highest_bid_id:'1', extend_bit:'1') 
     auction.save 
     Auction.stub(:find_by_id).and_return(auction) 
     bid = Bid.new(auction_id:'1',amount:'150.0') 
     bid.save 
     Bid.stub(:find_by_id).and_return(bid) 
     item = Item.new(id:'1',auction_id:'1',min_bid_price:'100.0') 
     item.save 
     Item.stub(:find_by_id).and_return(item) 

     #POST create 
     post :create, {:item => {'id' => '2','days'=>'1','hours'=>'1','minutes'=>'1'}} 

     response.should redirect_to(@item) 
     flash[:notice].should eql("Item was successfully created.") 


    end 
    end 
end 

不幸的是我跑了Rspec的，我得到了错误如下，我认为@item控制器无法成功创建@item = Item.new(params[:item])，所以这个错误可能会发生，但我找不到如何解决，我已经用了很多小时，我想有人的帮助。

失败：

1) ItemsController POST create 
Failure/Error: post :create, {:item => {'id' => '2','days'=>'1','hours'=>'1','minutes'=>'1'}} 
RuntimeError: 
    Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id 
# ./app/controllers/items_controller.rb:72:in `create' 
# ./spec/controllers/items_controller_spec.rb:19:in `block (3 levels) in <top (required)>' 

Finished in 0.637 seconds 1 example, 1 failure 

Failed examples: 

    rspec ./spec/controllers/items_controller_spec.rb:11 # ItemsController POST create 

    Randomized with seed 33483 

Answer 1

由于没有人登录，current_user方法返回nil。在规范中设置局部变量current_user对此没有帮助。相反，你可以定义ApplicationController#current_user=方法：

，并调用它在你的规格：

controller.current_user = current_user