Question

我有一个用于动态映射属性的rails应用程序。此方法在创建操作期间运行。出于某种原因，我的Rspec示例将通过，但我的Cucumber场景现在失败，因为我已经实现了这个方法。

class Product < ActiveRecord::Base

    def method_missing(method, *args)
        if method.to_s['=']
          self.define_singleton_method(method) do |*args|
            self.instance_variable_set("@#{method[0..-2]}", args.first)
          end
        else
          self.define_singleton_method(method) do
            self.instance_variable_get("@#{method}")
          end
        end
        self.send(method, *args) rescue super
    end

    def map_features
        @features = {}

        singleton_methods.each do |m|
            m = m.to_s.chomp('=')
            unless m == "brand" || m == "model"
                @features[m] = self.send(m)
            end
        end
        @features
    end

end

产品控制器：

class ProductsController < ApplicationController

    def index
        @products = Product.all
    end

    def new
        @product = Product.new
    end

    def create
        @product = Product.new

        if map_features && @product.save!
            flash[:notice] = "Success: Your product was saved!"
        else
            flash[:notice] = "Failure"
        end
        redirect_to @product
    end

    def show
        @product = Product.last
    end

end

失败的黄瓜步骤：

When(/^I upload the product with a "(.*?)" inch screen$/) do |screen_size|
  visit new_product_path
  fill_in('Brand', :with => @product.brand)
  fill_in('Model', :with => @product.model)
  fill_in('Screen Size', :with => screen_size)
  click_button 'Submit Product'

  page.should have_content("Success: Your product was saved!")
end

传递 Rspec示例：

describe ProductsController do

    describe "listing an item" do 

        context "params with only brand and model" do
            it "creates an item without features" do
                params = {:brand => "Dell", :model => "N5050"}
                product = FactoryGirl.build(:product, params)
                product.map_features
                product.brand.should eq("Dell")
            end
        end

        context "params with brand, model, and 1 feature" do
            it "creates an item with 1 feature" do
                params = {:brand => "Dell", :model => "N5050", :screen => "15", :port => "usb"}
                product = FactoryGirl.build(:product, params)
                product.map_features
                product.features["screen"].should eq("15")
            end
        end
    end

我收到的错误是：

undefined local variable or method `map_features' for #<ProductsController:0x0000000234d800> (NameError)
./app/controllers/products_controller.rb:24:in `create'
./features/step_definitions/new_product_steps.rb:12:in `/^I upload the product with a "(.*?)" inch screen$/'
features/new_product.feature:9:in `When I upload the product with a "15" inch screen'

Rails控制器不能在创建时使用Model实例方法

0 个答案: