Question

我正在尝试在Windows 7 https://github.com/cheezy/puppies上安装此应用。

我不是开发人员，我只是按照以下步骤进行安装：

在Windows 7上安装了Ruby版本ruby 2.2.4p230 (2015-12-16 revision 53155) [i386-mingw32]

步骤：

从上面链接下载zip
在puppies-master内部进行捆绑更新，然后捆绑安装。
然后是rails s
启动localhost：3000
错误ruby : unsupported parameters: :order。我修好了改变这一行

@puppies = Puppy.paginate :page =>params[:page], :order => 'name', :per_page => 4到这一行 @puppies = Puppy.order(:name).paginate(page: params[:page], per_page: 4)
错误消失了，在localhost：3000上它显示了我启动的应用
但小狗（数据）不存在，所以我做了

bundle && rake db:create && rake db:migrate然后rake db:seed
刷新本地主页并显示所有小狗但在我无法完成交易并点击Complete the adoption按钮后，它会给我一个错误。

undefined method 'name' for nil:NilClass

如果您只是在SOF中键入undefined method 'name' for nil:NilClass，您将获得如此多的解决方案，但它们似乎与那些不同，因为没有一个对我有效。

这就是日志所说的：

Started GET "/orders/new" for 127.0.0.1 at 2017-07-20 10:10:51
Processing by OrdersController#new as HTML
  Cart Load (0.0ms)  SELECT "carts".* FROM "carts" WHERE "carts"."id" = ? LIMIT 1  [["id", 1]]
  CACHE (0.0ms)  SELECT "carts".* FROM "carts" WHERE "carts"."id" = ? LIMIT 1  [["id", 1]]
Completed 500 Internal Server Error in 3ms

NoMethodError (undefined method `name' for nil:NilClass):
  app/controllers/orders_controller.rb:23:in `new'


  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/_trace.erb (2.5ms)
  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.0ms)
  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (242.5ms)


Started GET "/orders/new" for 127.0.0.1 at 2017-07-20 11:20:21 
Processing by OrdersController#new as HTML
  Cart Load (0.0ms)  SELECT "carts".* FROM "carts" WHERE "carts"."id" = ? LIMIT 1  [["id", 1]]
  CACHE (0.0ms)  SELECT "carts".* FROM "carts" WHERE "carts"."id" = ? LIMIT 1  [["id", 1]]
Completed 500 Internal Server Error in 3ms

NoMethodError (undefined method `name' for nil:NilClass):
  app/controllers/orders_controller.rb:23:in `new'


  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.0ms)
  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms)
  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (252.0ms)

修改

orders_controller.rb

class OrdersController < ApplicationController
  skip_before_filter :authorize, :only => [:new, :create]

  def index
    @orders = Order.paginate :page=>params[:page], :order=>'created_at desc',
    :per_page => 10

    respond_to do |format|
      format.html # index.html.erb
    end
  end

  def show
    @order = Order.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
    end
  end

  def new
    @cart = current_cart
    if current_cart.adoptions.empty?
      redirect_to agency_url, :notice => "Your cart is empty"
      return
    end

    @order = Order.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render :json => @order }
    end
  end

  def edit
    @order = Order.find(params[:id])
  end

  def create
    @order = Order.new(params[:order])
    @order.add_adoptions_from_cart(current_cart)

    respond_to do |format|
      if @order.save
        Cart.destroy(session[:cart_id])
        session[:cart_id] = nil
        format.html { redirect_to(agency_url, :notice => 'Thank you for adopting a puppy!') }
        format.json { render :json => @order }
      else
        format.html { render :action => "new" }
      end
    end
  end

  def update
    @order = Order.find(params[:id])

    respond_to do |format|
      if @order.update_attributes(params[:order])
        format.html { redirect_to(@order, :notice => 'Order was successfully updated.') }
      else
        format.html { render :action => "edit" }
      end
    end
  end

  def destroy
    @order = Order.find(params[:id])
    adoption = @order.adoptions.first
    adoption.delivered_on = Time.now
    adoption.save

    respond_to do |format|
      format.html { redirect_to(orders_url, :notice => "Please thank #{@order.name} for the order!") }
    end
  end
end

EDIT2：

current_card方法 -

class ApplicationController < ActionController::Base
  before_filter :authorize
  protect_from_forgery

  private

  def current_cart
    Cart.find(session[:cart_id])
  rescue ActiveRecord::RecordNotFound
    cart = Cart.create
    session[:cart_id] = cart.id
    cart
  end

  protected

  def authorize
    unless User.find_by_id(session[:user_id])
      redirect_to login_url, :notice => "Please log in"
    end
  end
end

Ruby：nil的未定义方法`name'：NilClass

0 个答案: