ruby-on-rails – 如何解决“错误的参数(预期的URI对象或URI字符

我达到了Chapter 11.37,但我的测试失败了.我收到以下错误：

Failure/Error: xhr :post,:create,relationship: { followed_id: other_user.id }
ArgumentError:
bad argument (expected URI object or URI string)

我是Ruby on Rails的新手,所以我真的不知道出了什么问题.有人可以帮助解决此错误吗？

控制器/ relationships_controller.rb：

class RelationshipsController < ApplicationController
  before_action :signed_in_user

  def create
    @user = User.find(params[:relationship][:followed_id])
    current_user.follow!(@user)
    respond_to do |format|
      format.html { redirect_to @user }
      format.js
    end
  end

  def destroy
    @user = Relationship.find(params[:id]).followed
    current_user.unfollow!(@user)
    respond_to do |format|
      format.html { redirect_to @user }
      format.js
    end
  end
end

功能/ relationships_controller_spec.rb：

require 'spec_helper'

describe RelationshipsController,type: :request do

  let(:user) { FactoryGirl.create(:user) }
  let(:other_user) { FactoryGirl.create(:user) }

  before { sign_in user,no_capybara: true }

  describe "creating a relationship with Ajax" do

    it "should increment the Relationship count" do
      expect do
        xhr :post,relationship: { followed_id: other_user.id }
      end.to change(Relationship,:count).by(1)
    end

    it "should respond with success" do
      xhr :post,relationship: { followed_id: other_user.id }
      expect(response).to be_success
    end
  end

  describe "destroying a relationship with Ajax" do

    before { user.follow!(other_user) }
    let(:relationship) { user.relationships.find_by(followed_id: other_user) }

    it "should decrement the Relationship count" do
      expect do
        xhr :delete,:destroy,id: relationship.id
      end.to change(Relationship,:count).by(-1)
    end

    it "should respond with success" do
      xhr :delete,id: relationship.id
      expect(response).to be_success
    end
  end
end