这是我的错误:
rake aborted!
Gem::LoadError: You have already activated rake 10.3.1, but your Gemfile requires rake 10.2.2. Prepending `bundle exec` to your command may solve this.
/Users/AaronWilliamson/.gem/ruby/2.1.0/gems/bundler-1.5.3/lib/bundler/runtime.rb:34:in `block in setup'
/Users/AaronWilliamson/.gem/ruby/2.1.0/gems/bundler-1.5.3/lib/bundler/runtime.rb:19:in `setup'
/Users/AaronWilliamson/.gem/ruby/2.1.0/gems/bundler-1.5.3/lib/bundler.rb:119:in `setup'
/Users/AaronWilliamson/.gem/ruby/2.1.0/gems/bundler-1.5.3/lib/bundler/setup.rb:7:in `<top (required)>'
/Users/AaronWilliamson/Desktop/Ripelist-Classifieds/config/boot.rb:4:in `<top (required)>'
/Users/AaronWilliamson/Desktop/Ripelist-Classifieds/config/application.rb:1:in `<top (required)>'
/Users/AaronWilliamson/Desktop/Ripelist-Classifieds/Rakefile:4:in `<top (required)>'
LoadError: cannot load such file -- bundler/setup
/Users/AaronWilliamson/Desktop/Ripelist-Classifieds/config/boot.rb:4:in `<top (required)>'
/Users/AaronWilliamson/Desktop/Ripelist-Classifieds/config/application.rb:1:in `<top (required)>'
/Users/AaronWilliamson/Desktop/Ripelist-Classifieds/Rakefile:4:in `<top (required)>'
(See full trace by running task with --trace)
我不能运行任何rake任务,这似乎是我所有其他问题的根源.几天前,当我运行rake命令时,情况并非如此.任何人都可以解释这里发生了什么,以及如何让我的应用回到正轨？我撞墙了.此外,bundle exec并没有为我解决问题的根源.我过去从来没有这样做过,现在还没有工作.
例如,我安装了以下四个版本:
水豚(2.2.1,2.2.0.rc1,2.1.0,1.1.4)
请建议如何卸载capybara版本1.1.4
寻找像gem listRVM宝石集中的东西,但让它忽略全局和默认宝石中的宝石,这样我就可以很容易地看到活动宝石集中的宝石(并且只有活动宝石集).
我正在学习Ruby on Rails并尝试开发一个应用程序.在我的应用我试图使用默认的开发模式SQLite数据库和PostgreSQL的在生产模式.但是在尝试使用以下命令安装pg gem时出现以下错误:gem install pg
Building native extensions. This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/home/tusharkhatiwada/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /usr/bin/pg_config
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev
for building a client-side application.
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev
for building a client-side application.
checking for libpq-fe.h... no
Can't …执行时
format.json{render json: {}, status: :ok}
在Rails 4.0.4中,我收到以下错误:
ArgumentError (too few arguments):
虽然我有另一个程序(使用Rails 3.2.13),其中完全相同的行执行没有问题.我在这里错过了什么吗？
任何宝石？
或使用rails 4更改语法？
我正在研究一个正在考虑使用Cassandra作为数据库的项目.我们希望最终迁移到Cassandra,即使我们使用MySQL开始,因为它具有可扩展性.我知道像Facebook,Digg和最近的Twitter这样的大公司正在使用Cassandra,但我不相信任何这些网站都会使用Rails.我的问题是使用Ruby on Rails使用Cassandra是否可行.需要考虑的要点:
感谢任何提示.
插件和宝石有什么区别？每种用途有何不同？您在哪里以及为何使用其中一个？
我一直试图在我的Mac上安装rails.我有OS X 10.6.8,我已经确认我有Ruby,版本1.8.7
我跑了sudo gem update并sudo gem update --system获得了该软件的最新版本.
但是,当我运行时,sudo gem install rails我收到此错误:
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h
Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/json-1.6.3 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/json-1.6.3/ext/json/ext/parser/gem_make.out
我想全局安装ruby gem(sudo gem install capybara-webkit)但是我希望它从github存储库中的master安装.我知道这可以使用bundler完成,但我想从命令行完成,因为我主要使用pry进行编码.
我检查了所有其他类似的答案,没有一个与我的完全一样,这些解决方案都没有为我工作.
gem environment并sudo gem environment给出相同的结果:
RubyGems Environment:
- RUBYGEMS VERSION: 1.5.3
- RUBY VERSION: 1.8.7 (2011-12-28 patchlevel 357) [x86_64-linux]
- INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8
- RUBY EXECUTABLE: /usr/local/bin/ruby
- EXECUTABLE DIRECTORY: /usr/local/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86_64-linux
- GEM PATHS:
- /usr/local/lib/ruby/gems/1.8
- /home/ava/.gem/ruby/1.8
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- http://rubygems.org/
rvm -v : rvm …