ruby-on-rails – 如何为Rails POST方法构建postman请求

我有一个带有传递规范的create方法的Rails API,以说明控制器消息是合理的：

describe "POST power_up" do

    let!(:client) { FactoryGirl.create :client,name: "joe",auth_token: "asdfasdfasdfasdfasdfasdf" }

    it "should create and save a new Power Up" do

      expect { post :create,format: :json,power_up: FactoryGirl.attributes_for(:power_up) }.to change(V1::PowerUp,:count).by(1)
    end

  end

我正在使用Postman尝试POST.无论我尝试什么,我都会收到错误：

Started POST "/v1/power_ups.json" for 127.0.0.1 at 2014-08-30 18:05:29 -0400
Error occurred while parsing request parameters.
Contents:

{
  'name': 'foo','description': 'bar'
}


ActionDispatch::ParamsParser::ParseError (795: unexpected token at '{
  'name': 'foo','description': 'bar'
}

邮差请求设置：

我也尝试过：

{
  'power_up': {
    'name': 'foo','description': 'bar'
   }
}

power_ups_controller.rb中的create方法和强参数声明中的代码：

def create
    @power_up = PowerUp.new(power_up_params)

  if @power_up.save!
    redirect_to @power_up
  end
end

private

  def power_up_params
    params.require(:power_up).permit(:name,:description)
  end