小编Jam*_*ier的帖子

libv8 gem(v3.3.10之后的任何内容)的安装失败并显示消息"Killed".

我在我的Gemfile中包含了libv8和therubyracer:

group :production, :staging do
  gem 'libv8'
  gem 'therubyracer'
end

在bundle update本地精品键(Mac OS X).当我这样做时cap staging deploy,部署失败了:

  * 2013-01-04 19:17:51 executing `bundle:install'
  * executing "cd /path/to/app/app-staging/releases/20130105001748 && bundle install --gemfile /path/to/app/app-staging/releases/20130105001748/Gemfile --path /path/to/app/app-staging/shared/bundle --deployment --quiet --without development"
    servers: ["staging.app.com"]
    [staging.app.com] executing command
 ** [out :: staging.app.com] bash: line 1:  4324 Killed                  bundle install --gemfile /path/to/app/app-staging/releases/20130105001748/Gemfile --path /path/to/app/app-staging/shared/bundle --deployment --quiet --without development
    command finished in 48980ms
*** [deploy:update_code] rolling back
  * executing "rm -rf /path/to/app/app-staging/releases/20130105001748; true" …

建议什么可以解析Ruby中的GPX文件？

我尝试过gpx,但它不适用于Ruby Enterprise Edition(https://github.com/dougfales/gpx/issues/1).

我不想写一个解析器.

我在我的用户模型(使用设计和确认)中有一个方法,new_with_session根据Omniauth + Devise(https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview)的要求调用:

def self.new_with_session(params, session)
  super.tap do |user|
    if data = session["devise.facebook_data"] && session["devise.facebook_data"]["extra"]["raw_info"] || session["devise.google_data"] && session["devise.google_data"]["extra"]["raw_info"]
      user.email = data["email"]
    end
  end
end

允许用户使用Google或Facebook登录,我使用此行保存权限user.email:

if data = session["devise.facebook_data"] && session["devise.facebook_data"]["extra"]["raw_info"] || session["devise.google_data"] && session["devise.google_data"]["extra"]["raw_info"]

但我不认为是正确的方式,所以......

1. 您是否知道user.email比使用||运营商更好的构建方式？
2. 如果我想从Google/Facebook中保存更多数据,比如用户名,我应该将其添加到我的自定义中new_with_session吗？如果是这样,为什么？

我有一个 Rails 引擎，我想在其中使用 Devise。我按照本指南正常安装了设备。

我在我的引擎 devise.rb 中添加了这个：

Devise.setup do |config|
  config.router_name = :cms_user
end

我在我的路由文件中添加了这个：

Cms::User::Engine.routes.draw do
  devise_for :users, {
    class_name: 'Cms::User',
    module: :devise
  }
end

我在我的路线中添加了这个：

devise_for :users, {
  class_name: 'Cms::User',
  module: :devise
}

但是我不断收到此错误：

undefined method 'cms_user'

我究竟做错了什么 ？

我是新来的Rails,我试图找出如果rake db:create和rake db:migrate是幂等.

换句话说,我可以反复对我的DB(postgres或mysql)运行这两个命令而不会导致问题吗？

我们的想法是自动化Rails部署,并在每次部署Rails应用程序时运行这些命令.我想确保它不会以某种方式弄乱数据库.

任何其他关于rake db迁移的幂等性的问题都非常受欢迎.

我正在尝试在Rails上运行一个应用程序,用于saas课程,作业2.每当我刷新页面时,我都会收到以下错误:

NoMethodError in MoviesController#index

undefined method `keys' for nil:NilClass
Rails.root: C:/Sites/RailsProjects/hw2_rottenpotatoes

Application Trace | Framework Trace | Full Trace
app/controllers/movies_controller.rb:24:in `block in index'
app/controllers/movies_controller.rb:23:in `each'
app/controllers/movies_controller.rb:23:in `index'

我的movies_controller.rb档案:

class MoviesController < ApplicationController

  def show
    id = params[:id] # retrieve movie ID from URI route
    @movie = Movie.find(id) # look up movie by unique ID
  end

  def index
    redirect = false

    if params[:sort]
      @sorting = params[:sort]
    elsif session[:sort]
      @sorting = session[:sort]
      redirect = true
    end

    if redirect
      redirect_to movies_path(:sort …

我有这个结构:

<div id="d1">
Text
<div id="d2">Word</div>
<a href="#hide">My other text</a>
</div>

现在,我想要点击#hide:target,div#d2消失.

我可以用CSS做到这一点吗？

从Rails控制台使用MailChimp gem时出现间歇性错误.

这是错误:

Excon::Errors::SocketError: EOFError (EOFError)
  from /Users/me/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/openssl/buffering.rb:246:in `readline'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/excon-0.26.0/lib/excon/response.rb:39:in `parse'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/excon-0.26.0/lib/excon/middlewares/response_parser.rb:6:in `response_call'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/excon-0.26.0/lib/excon/connection.rb:349:in `response'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/excon-0.26.0/lib/excon/connection.rb:252:in `request'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/excon-0.26.0/lib/excon/connection.rb:290:in `post'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/mailchimp-api-2.0.3/lib/mailchimp.rb:40:in `call'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/mailchimp-api-2.0.3/lib/mailchimp/api.rb:861:in `member_info'
  from (irb):5
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/railties-3.2.14/lib/rails/commands/console.rb:47:in `start'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/railties-3.2.14/lib/rails/commands/console.rb:8:in `start'
  from /Users/me/.rvm/gems/ruby-1.9.3-p448@launchsoon/gems/railties-3.2.14/lib/rails/commands.rb:41:in `<top (required)>'
  from script/rails:6:in `require'
  from script/rails:6:in `<main>'

该缓冲区 调用格式化Buffer(g,d)。

g 是几何值（例如点、线串和多边形）。

d 是一段距离。

使用什么计量单位d？米？英里？公里？

以这段代码为例:

class Thing
  attr_accessor :options, :list

  def initialize
    @list    = []
    @options = { published_at_end: 'NOW', published_at_start: 'NOW-2DAYS' }
  end

  def run
    # If you replace this comment with a debugger, the value of list is nil
    list += _some_method(options)
    return list
  end

  private

  def _some_method(options)
    [options[:published_at_start], 1, 2, 3, 4, options[:published_at_end]]
  end
end

如果将其复制/粘贴到irb中,则运行:

• t = Thing.new
• t.run

它会输出这个错误:

NoMethodError: undefined method `+' for nil:NilClass

如果删除+=线(只留下return线),它返回[]......所以从我可以告诉,它只是存在+=,设置list到nil.我也觉得有趣的是它的值nil …