小编Jus*_*zer的帖子

Unknown key(s): counter_cache尝试在我的RoR应用程序中实现计数器缓存列时出现错误.

我在这个问题中实现了模型关联:模型关联问题

这是我的迁移:

class AddVideoVotesCountToVideos < ActiveRecord::Migration
  def self.up
    add_column :videos, :video_votes_count, :integer, :default => 0

    Video.reset_column_information
    Video.find(:all).each do |p|
      p.update_attributes :videos_votes_count, p.video_votes.length
    end
  end

  def self.down
    remove_column :videos, :video_votes_count
  end
end

然而,在看了http://media.railscasts.com/videos/023_counter_cache_column.mov后,我想也许我不得不在:counter_cache => true之后进入VideoVote模型belongs_to :video.但是,当我这样做时,我收到错误:

wrong number of arguments (2 for 1)

我究竟做错了什么？

例如,当用户向问答网站添加问题时,该问题通常会获得自己的网页,并且该网页是即时创建的.你怎么用PHP做到这一点？谁能指点我任何资源？谢谢.

这是测试:

        describe "admin attribute" do

        before(:each) do
          @user = User.create!(@attr)
        end

        it "should respond to admin" do
          @user.should respond_to(:admin)
        end

        it "should not be an admin by default" do
          @user.should_not be_admin
        end

        it "should be convertible to an admin" do
          @user.toggle!(:admin)
          @user.should be_admin
        end
      end

这是错误:

  1) User password encryption admin attribute should respond to admin
 Failure/Error: @user = User.create!(@attr)
 ActiveRecord::RecordInvalid:
   Validation failed: Email has already been taken
 # ./spec/models/user_spec.rb:128

我认为错误可能在我的数据填充程序代码中的某处:

require 'faker'

namespace :db do
  desc "Fill database with …

我用jQuery动态地附加一些html,我想直接在另一个元素的顶部插入它.我该怎么做呢？

这是我的application.js文件中的代码:

$(document).ready(function() {
$('a.oembed').embedly({maxWidth:300,'method':'replace'}).bind('embedly-oembed', function(e, oembed){
      $("#video_div").append($("<img>", { src: oembed.thumbnail_url, width:200 }));
   });
});

图像是动态插入的,我希望它直接在这上面:

<div id="video_div"><%= link_to 'video', @video.video_url, :class => 'oembed' %></div>

如何将两种不同的样式应用于"投票"文本和此RoR代码的数字输出:

<%= pluralize video.vote_sum, 'Vote' %>

我在投票控制员中有这条线:

before_filter :authenticate

因此,当我在注销时投票时,它应该使此过滤器失败.

我的应用程序控制器中的我的身份验证方法如下所示:

def authenticate
    logged_in? ? true : access_denied
end

所以它返回access_denied如下所示:

def access_denied
    redirect_to login_path, :notice => "You must log in to perform this action." and return false
end

因此,我应该被重定向到我的登录页面,对吧？

我在routes.rb文件中有这个:

match '/login' => "sessions#new", :as => "login"

我有一个new登录表单的视图,我应该在我投票时重定向到我没有登录.create我的投票控制器的方法中也有这个代码:

if @vote.save
    respond_to do |format|
      format.html { redirect_to @video }
      format.js
    end
  else
    respond_to do |format|
      format.html
    end
  end

但是当我投票时,我没有重定向,我在日志中收到此错误消息:

Started GET "/login" for 127.0.0.1 at Thu Mar 24 21:18:08 -0700 2011 …

我想确保涵盖我的应用程序的所有安全方面.我知道这可能因应用程序而异,但您应该确保采取哪些一般措施来防止安全漏洞？

我在routes.db文件中有这个代码:

resources :users do
  member do
    get :following, :followers
  end
end

我收到错误:

can't use member outside resource(s) scope (ArgumentError) 

我该如何解决？

更新:这是我的routes.db文件的所有代码:

SampleApp::Application.routes.draw do
get "sessions/new"

resources :users
member do
  get :following, :followers
end

resources :sessions, :only => [:new, :create, :destroy]
resources :microposts, :only => [:create, :destroy]
resources :relationships, :only => [:create, :destroy]

match '/signup', :to => 'users#new' 
match '/signin',  :to => 'sessions#new'
match '/signout', :to => 'sessions#destroy' 

match '/contact', :to => 'pages#contact'
match '/about',   :to => 'pages#about'
match '/help',    :to …

假设你有一个.click()电话.您可以在该.click()调用中编写什么代码,以便每次单击所选元素时,可以更改两个字符串之间的文本.我假设.toggle()并将.text()在这里发挥作用......

加载视频节目视图时出现此错误:

SyntaxError in Videos#show

Showing /rubyprograms/dreamstill/app/views/comments/new.html.erb where line #1 raised:

compile error
/rubyprograms/dreamstill/app/views/comments/new.html.erb:1: syntax error, unexpected tASSOC, expecting kEND
...deo.comments.new]), :remote => true do |f| @output_buffer.sa...
                          ^
/rubyprograms/dreamstill/app/views/comments/new.html.erb:6: syntax error, unexpected kENSURE, expecting $end

它在我的comments/new.html.erb文件中指向此表单:

<%= simple_form_for([@video, @video.comments.new]), :remote => true do |f| %>
  <%= f.association :comment_title, :collection => @video.comment_titles, :label => "Comment Title:", :include_blank => false %>
  <%= f.input :body, :label => false, :placeholder => "Post a comment." %>
  <%= f.button :submit, :value => "Post" %>
<% end %> …