小编Eze*_*lin的帖子

根据rvm的要求,"对于Ruby 1.9.3:安装libksba#如果使用Homebrew,'brew install libksba'"

我是全新的,不熟悉终端命令.如何在不使用自制程序的情况下安装libksba？

请帮忙!!!

我确信这是微不足道的,但过去几个小时我一直在敲桌子.我正在尝试将字符串(即"key1,key2 :)转换为数组(即["key1","key2"]),然后将其存储在数据库中.我在我的模型中使用了before_validation回调函数似乎没有开火.

我的模型看起来像这样:

class Product < ActiveRecord::Base
  serialize :keywords, Array
  attr_accessible :keywords

  before_validation :update_keywords

  def update_keywords
    self.update_attributes(:keywords, self.keywords.split(',').collect(&:strip)
  end
end

我收到了SerializationTypeMismatch错误.显然,update_keywords方法没有运行或者没有正确返回更新的属性.

有任何想法吗？

编辑
我正在使用Rails 3.0.3,如果这有任何区别.

编辑#2
只是想跟进并说我发现删除序列化列类型声明并确保它默认为空数组(即[])而不是nil清除了许多问题.

为了像我这样的人开始使用Rails旅行,我应该注意到这很可能不是创建序列化属性的最佳方式.我只是移植了一个利用旧数据库的项目.

在我的应用程序中包含数据库分片宝石章鱼后,我得到以下错误...有人可以帮助我吗？.....

/usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/core_ext/module/aliasing.rb:31:in `alias_method': undefined method `announce' for class `Class' (NameError)
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/core_ext/module/aliasing.rb:31:in `alias_method_chain'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus/migration.rb:9:in `extended'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus/migration.rb:73:in `extend'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus/migration.rb:73
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:223:in `load_dependency'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:640:in `new_constants_in'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:223:in `load_dependency'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /usr/lib/ruby/gems/1.8/gems/ar-octopus-0.3.4/lib/octopus.rb:66
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `each'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `each'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `require'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler.rb:122:in `require'
    from /var/www/scandetails/config/application.rb:7
    from /usr/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/commands.rb:38:in `require'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/commands.rb:38
    from script/rails:6:in `require'
    from script/rails:6

我正在尝试lftp通过 ftp 下载一个非常大的文件。但pget据我所见，仅打开一个 TCP 连接netstat -na。这是我的命令和调试输出：

脚本：

open -u username,password aftp.linksynergy.com
pget -n 5 /36342_2923873_mp.txt.gz -o buy.com.csv.gz

跑步：

user@db1:/mnt/tmp/lftp_test$ lftp -d -f lfscript
---- Resolving host address...
---- 1 address found: 63.123.248.17
---- Connecting to aftp.linksynergy.com (63.123.248.17) port 21
<--- 220 gcws3002.private.linksynergy.com FTP server (Version wu-2.6.2-9) ready.
---> FEAT
<--- 530 Please login with USER and PASS.
---> AUTH TLS
<--- 500 AUTH command not supported.
---> USER username
<--- 331 Password required for …

我想使用PCRE获取URI的列表并提取它.

开始:

http://abcd.tld/products/widget1       
http://abcd.tld/products/widget2    
http://abcd.tld/products/review    
http://1234.tld/

完成:

http://abcd.tld/products/widget1
http://1234.tld/

任何想法,亲爱的StackOverflow成员？