分享 向社区的朋友推荐自己的书《Rails 实践》
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推荐自己的书，实在诚惶诚恐。
这是第一次写书，从 2 月 11 日到 6 月 29 日，总共用了四个半月的时间。书中的内容是按照自己的想法组织的，每个章节的内容来自对 Rails 手册的理解，api 的阅读体会，以及开发中的一点点心得。这本书，我一直称它为经验的合订本，也是写给自己多年开发经验的总结。
我的技术成长并非一帆风顺，在写这本书的时间里，我不断的回顾各种代码细节，也不断的补充知识内容。回头看来，这对我现在的项目开发很有益处。我想，一个人的技术成长有各自的方式，四个半月，可以做一个代码项目，也可以写出一本书来，从性格上，我更适合后者。
Ruby China 社区是国内最好的 Ruby 开发社区，这里有大量的经验分享，也有一群热心的人帮助解决开发中遇到的各种问题。能够从事 Rails 开发，并且身边有一个如此活跃、高质量的社区，实在是件幸运事。它对我的技术成长有着巨大的帮助，所以，这个社区会一直出现在书的感谢列表中。
现在，我把这本书正式的介绍给社区的朋友们。之前在社区里回复别人帖子的时候，贴过书里的连接，那时候，我觉得书的内容还不是很充分，所以只在自己微信朋友圈分享过，但得到的反馈还是有限的，作为一个写作上的新手，还是很期望得到别人更多的反馈。所以这次正式贴出来，希望朋友们不吝赐教，督促我改进和提高书中内容。
再次，感谢社区的朋友们。
感谢 lz，
http://rails-practice.com/content/Chapter_3/3.2.html
最后一行
代码在这里，链接失效
#34 楼 @michael_roshen 的确，非常考验耐心，尤其在写到一半的时候。
如果什么时候准备出版的话，还是需要再仔细校正一些通假字。
虽然大家都可以理解，但若是碰到完全的新手，难免会造成小小的误解。
我想这个肯定不是楼主所期望的。
#47 楼 @douxiance 是的，写的时候缺少经验，而且刚开始的时候过多口语化表达，难免有让人不解的用词。写到后面才感觉略好，用词拿捏也准确了一些。不过这个过程实在漫长，有时候像是自言自语，嘿嘿。
#60 楼 @ery 过奖了，真的，我只是个普普通通的开发者。
#58 楼 @easonlovewan 谢谢。从 4.0 开始，我经常翻 rails guides，因为有一年时间没有接触新版本 rails，所以从 3 到 4 的过程中发现很多陌生的地方，而且越来越觉得自己对 rails 的了解仅限于解决眼前的问题。手册翻了好多好多遍之后，我感觉很多的知识点是可以通过某些形式串联起来的，于是就想系统的把感悟写出来。我想，如果你很熟悉 rails guides 的话，这本书会帮助你熟悉 guides 中的内容如何应用到项目中。
再次感谢楼上各位朋友。
@dayudodo 真正的rails初学者应该是指连HTML 这些 Web 有关的基础知识都未入门的小白吧！
我想能从JSP、PHP、ASP.NET等大众 Web 技术的重重封堵下坚定的看好·rails的人应该都是过了那个小白的关卡！
面对rails有很多新手，但面对 Web 却都是老战友了。
#66 楼 @dayudodo #67 楼 @douxiance
我觉得初次接触 rails 的朋友，还是应该看看大家都看过的 Rails 敏捷开发，Rails way 这种书比较合适，或者网络上的课程，跟着视频写写代码，然后看看 Rails Guides 和 API 文档。当然，不管什么时候看这本书，都要同时看其他的资料，书里引用了大量的连接，包括其他一些优秀的书籍。
至于刚接触 web 编程的朋友，还是应该从 html，css，js 开始熟悉编程，了解原理。Ruby 是一个工具，可以帮助我们写出更好的 html。所以从事 web 开发，还是要从 html 开始比较合适吧。
看到书中第二章文件简介部分，就觉得遇到知音了，如果是我写，也是先把这些介绍清楚，在开始阶段，别的都是虚的，拿到一个项目哪个文件夹的文件是干什么的都搞不清楚，那基本没得玩了。赞一个。
不好意思，最近想体验一下 Ruby，于是看您的书学习，遇见个问题，百度了没找到解决方案，发帖又刚注册，比较尴尬，所以才借贵宝地提个问，学校最近更新网络架构，墙比较厉害，根本无法科学上网 Google，实在找不到了才来问的！
我是按照您的书步骤来的，安装好rvm，在.zshrc添加 PATH
export PATH="/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
export PATH="$PATH:$HOME/.rvm/bin"
本机的一些参数，在 segmentfault 找到了一个淘宝源命令，改了一下源。
sed -i .bak 's!cache.ruby-lang.org/pub/ruby!ruby.taobao.org/mirrors/ruby!' $rvm_path/config/db
➜ ~ ruby -v
ruby 2.0.0p481 (2014-05-08 revision 45883) [universal.x86_64-darwin14]
➜ ~ gem -v
2.0.14
➜ ~ rvm -v
rvm 1.26.11 (latest) by Wayne E. Seguin <[email protected]>, Michal Papis <[email protected]> [https://rvm.io/]
➜ ~ rails
Rails is not currently installed on this system. To get the latest version, simply type:
$ sudo gem install rails
You can then rerun your "rails" command.
rvm install 2.2.0进行安装，能安装，但是报错如下，能 use，但是无法安装 rails。
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.10/x86_64/ruby-2.2.0.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx.
Certificates in '/usr/local/etc/openssl/cert.pem' are already up to date.
Requirements installation successful.
Installing Ruby from source to: /Users/Yugo/.rvm/rubies/ruby-2.2.0, this may take a while depending on your cpu(s)...
ruby-2.2.0 - #downloading ruby-2.2.0, this may take a while depending on your connection...
ruby-2.2.0 - #extracting ruby-2.2.0 to /Users/Yugo/.rvm/src/ruby-2.2.0 - please wait
ruby-2.2.0 - #applying patch /Users/Yugo/.rvm/patches/ruby/2.2.0/fix_installing_bundled_gems.patch - please wait
ruby-2.2.0 - #configuring - please wait
ruby-2.2.0 - #post-configuration - please wait
ruby-2.2.0 - #compiling - please wait
ruby-2.2.0 - #installing - please wait
Error running '__rvm_make install',
showing last 15 lines of /Users/Yugo/.rvm/log/1442124916_ruby-2.2.0/install.log
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/spec_fetcher.rb:42:in `fetcher'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/resolver/installer_set.rb:37:in `initialize'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/dependency_installer.rb:430:in `new'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/dependency_installer.rb:430:in `resolve_dependencies'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/dependency_installer.rb:373:in `install'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems.rb:558:in `install'
from ./tool/rbinstall.rb:717:in `block (2 levels) in <main>'
from ./tool/rbinstall.rb:716:in `each'
from ./tool/rbinstall.rb:716:in `block in <main>'
from ./tool/rbinstall.rb:749:in `call'
from ./tool/rbinstall.rb:749:in `block in <main>'
from ./tool/rbinstall.rb:746:in `each'
from ./tool/rbinstall.rb:746:in `<main>'
make: *** [do-install-nodoc] Error 1
+__rvm_make:0> return 2
There has been an error while running make install. Halting the installation.
#85 楼 @yugo hi，估计是网络问题，用下面的方法，把本地的数据源改成淘宝：
gem sources -l 查看列表
gem sources -r https://rubygems.org/ 删除掉本地的源
gem sources -a https://ruby.taobao.org/ 添加淘宝到环境
如果校验 cert 失败，可以不用 https://xxx，改成 http://xxxxx
然后再安装，对于没有安装成功的 gem，建议先 gem uninstall xxx，安装的时候，尤其是 rails，可以使用
gem install rails --no-ri --no-rdoc 可以节省时间。google 如果翻墙不行，可以用 bing.com 或百度，一些常见问题百度还是能找到一点靠谱答案的。
➜ ~ gem sources -l
*** CURRENT SOURCES ***
https://ruby.taobao.org/
查看了一下就是淘宝的源。主要是安装 rvm install 2.2.0 出错，重新安装，涛声依旧。
😭，还是这个错误，我相信上天是公平的，毕竟颜值在那放着。我去试试 vagrant,生命不息，折腾不止。
估计这个有用吧，试试看。#89 楼 @chenge
it not worked.
#88 楼 @liwei78
这让我的命令行瞬间爆炸~
➜ ~ gem sources --remove https://ruby.taobao.org/
/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/yaml.rb:4:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle, 9): Library not loaded: /usr/local/opt/libyaml/lib/libyaml-0.2.dylib (LoadError)
Referenced from: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle
Reason: image not found - /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/psych.rb:1:in `<top (required)>'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/yaml.rb:5:in `<top (required)>'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems.rb:624:in `load_yaml'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/config_file.rb:328:in `load_file'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/config_file.rb:197:in `initialize'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `new'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `do_configuration'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:39:in `run'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/bin/gem:21:in `<main>'
➜ ~ gem sources -l
/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/yaml.rb:4:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle, 9): Library not loaded: /usr/local/opt/libyaml/lib/libyaml-0.2.dylib (LoadError)
Referenced from: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle
Reason: image not found - /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/psych.rb:1:in `<top (required)>'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/yaml.rb:5:in `<top (required)>'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems.rb:624:in `load_yaml'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/config_file.rb:328:in `load_file'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/config_file.rb:197:in `initialize'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `new'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `do_configuration'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:39:in `run'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/bin/gem:21:in `<main>'
➜ ~ gem sources -a http://ruby.taobao.org/
/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/yaml.rb:4:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle, 9): Library not loaded: /usr/local/opt/libyaml/lib/libyaml-0.2.dylib (LoadError)
Referenced from: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle
Reason: image not found - /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14/psych.bundle
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/psych.rb:1:in `<top (required)>'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/yaml.rb:5:in `<top (required)>'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems.rb:624:in `load_yaml'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/config_file.rb:328:in `load_file'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/config_file.rb:197:in `initialize'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `new'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:74:in `do_configuration'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/gem_runner.rb:39:in `run'
from /Users/Yugo/.rvm/rubies/ruby-2.2.0/bin/gem:21:in `<main>'
#90 楼 @yugo 建议你先按照 http://rvm.io/rvm/install 安装最新的 rvm，然后重新安装 ruby，目前可以装 ruby 2.2.2，写书的时候还是 2.2.0。
Error running '__rvm_make install',我是根据这个搜索的。
rvm get head更新 rvm
rvm reinstall 2.2.0重新安装。
试一下，不行的话，贴图看问题在哪里吧。
#89 楼 @chenge #86 楼 @liwei78 感谢您们的细心解答。我自己再研究研究，争取把坑全踩完，之后发一篇分享。 这是我 MAC 下面生成了 Log 文件，安装 2.2.1，依旧一样。不过我 vagrant 里面的安装成功了。
# ubuntu vagrant
# mac install.log
+__rvm_make:0> make install
config.status: creating x86_64-darwin14-fake.rb
CC = gcc
LD = ld
LDSHARED = gcc -dynamiclib
CFLAGS = -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wshorten-64-to-32 -Wimplicit-function-declaration -Wdivision-by-zero -Wdeprecated-declarations -Wextra-tokens -fno-common -pipe
XCFLAGS = -D_FORTIFY_SOURCE=2 -fstack-protector -fno-strict-overflow -fvisibility=hidden -DRUBY_EXPORT
CPPFLAGS = -I/usr/local/Cellar/libyaml/0.1.6_1/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT -I. -I.ext/include/x86_64-darwin14 -I./include -I.
DLDFLAGS = -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -L/usr/local/Cellar/libyaml/0.1.6_1/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -install_name /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/libruby.2.2.0.dylib -current_version 2.2.0 -compatibility_version 2.2.0 -fstack-protector -Wl,-u,_objc_msgSend -framework CoreFoundation -fstack-protector -Wl,-u,_objc_msgSend -framework CoreFoundation
SOLIBS = -lpthread -ldl -lobjc
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/c++/4.2.1
Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.4.0
Thread model: posix
making enc
make[1]: Nothing to be done for `enc'.
making srcs under enc
make[1]: Nothing to be done for `srcs'.
generating transdb.h
transdb.h unchanged
making trans
make[1]: Nothing to be done for `./enc/trans'.
making encs
generating makefile exts.mk
Failed to configure -test-/win32/console. It will not be installed.
Failed to configure -test-/win32/dln. It will not be installed.
Failed to configure -test-/win32/dln/empty. It will not be installed.
Failed to configure -test-/win32/fd_setsize. It will not be installed.
Failed to configure gdbm. It will not be installed.
configuring socket
Failed to configure tk. It will not be installed.
Failed to configure tk/tkutil. It will not be installed.
Failed to configure win32. It will not be installed.
Failed to configure win32ole. It will not be installed.
make[2]: Nothing to be done for `all'.
make[2]: Nothing to be done for `all'.
make[2]: Nothing to be done for `all'.
make[2]: Nothing to be done for `all'.
installing default bigdecimal libraries
installing default date_core libraries
installing digest libraries
installing default digest libraries
installing default sha2 libraries
installing default fiddle libraries
make[2]: Nothing to be done for `all'.
installing default console libraries
installing default libraries
installing default nkf libraries
installing default openssl libraries
installing default pathname libraries
installing default psych libraries
installing default pty libraries
linking shared-object ripper.bundle
installing default ripper libraries
checking ../.././parse.y and ../.././ext/ripper/eventids2.c
linking shared-object socket.bundle
installing default socket libraries
installing default syslog libraries
make[2]: Nothing to be done for `all'.
make[2]: Nothing to be done for `all'.
make[2]: Nothing to be done for `all'.
make[2]: Nothing to be done for `all'.
make[2]: `ruby' is up to date.
./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems -r./x86_64-darwin14-fake ./tool/rbinstall.rb --make="/Applications/Xcode.app/Contents/Developer/usr/bin/make" --dest-dir="" --extout=".ext" --mflags="" --make-flags="" --data-mode=0644 --prog-mode=0755 --installed-list .installed.list --mantype="doc"
installing binary commands: /Users/Yugo/.rvm/rubies/ruby-2.2.0/bin
installing base libraries: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib
installing arch files: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14
installing pkgconfig data: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/pkgconfig
installing command scripts: /Users/Yugo/.rvm/rubies/ruby-2.2.0/bin
installing library scripts: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0
installing common headers: /Users/Yugo/.rvm/rubies/ruby-2.2.0/include/ruby-2.2.0
installing manpages: /Users/Yugo/.rvm/rubies/ruby-2.2.0/share/man/man1
installing extension objects: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/x86_64-darwin14
installing extension objects: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/x86_64-darwin14
installing extension objects: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/vendor_ruby/2.2.0/x86_64-darwin14
installing extension headers: /Users/Yugo/.rvm/rubies/ruby-2.2.0/include/ruby-2.2.0/x86_64-darwin14
installing extension scripts: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0
installing extension scripts: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0
installing extension scripts: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/vendor_ruby/2.2.0
installing extension headers: /Users/Yugo/.rvm/rubies/ruby-2.2.0/include/ruby-2.2.0/ruby
installing default gems: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/gems/2.2.0 (build_info, cache, doc, extensions, gems, specifications)
bigdecimal 1.2.6
io-console 0.4.3
json 1.8.1
psych 2.0.8
rake 10.4.2
rdoc 4.2.0
installing bundle gems: /Users/Yugo/.rvm/rubies/ruby-2.2.0/lib/ruby/gems/2.2.0 (build_info, cache, doc, extensions, gems, specifications)
/Users/Yugo/.rvm/src/ruby-2.2.0/lib/yaml.rb:4:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/Users/Yugo/.rvm/src/ruby-2.2.0/.ext/x86_64-darwin14/psych.bundle, 9): Library not loaded: /usr/local/opt/libyaml/lib/libyaml-0.2.dylib (LoadError)
Referenced from: /Users/Yugo/.rvm/src/ruby-2.2.0/.ext/x86_64-darwin14/psych.bundle
Reason: image not found - /Users/Yugo/.rvm/src/ruby-2.2.0/.ext/x86_64-darwin14/psych.bundle
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/src/ruby-2.2.0/.ext/common/psych.rb:1:in `<top (required)>'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/yaml.rb:5:in `<top (required)>'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems.rb:624:in `load_yaml'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/config_file.rb:328:in `load_file'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/config_file.rb:197:in `initialize'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems.rb:297:in `new'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems.rb:297:in `configuration'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/remote_fetcher.rb:51:in `fetcher'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/spec_fetcher.rb:76:in `initialize'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/spec_fetcher.rb:42:in `new'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/spec_fetcher.rb:42:in `fetcher'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/resolver/installer_set.rb:37:in `initialize'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/dependency_installer.rb:430:in `new'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/dependency_installer.rb:430:in `resolve_dependencies'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems/dependency_installer.rb:373:in `install'
from /Users/Yugo/.rvm/src/ruby-2.2.0/lib/rubygems.rb:558:in `install'
from ./tool/rbinstall.rb:717:in `block (2 levels) in <main>'
from ./tool/rbinstall.rb:716:in `each'
from ./tool/rbinstall.rb:716:in `block in <main>'
from ./tool/rbinstall.rb:749:in `call'
from ./tool/rbinstall.rb:749:in `block in <main>'
from ./tool/rbinstall.rb:746:in `each'
from ./tool/rbinstall.rb:746:in `<main>'
make: *** [do-install-nodoc] Error 1
+__rvm_make:0> return 2
#93 楼 @yugo 说实在的，看 log 不是个愉快的事情。我搜索了第一个 error。
来自这个链接： http://stackoverflow.com/questions/9434002/how-to-solve-ruby-installation-is-missing-psych-error
@liwei78 李伟出书的贴子必段要顶一下，想当年我们合作开发百草网，用得是 rails 2.2。后面我们准备重走 rails 之路，再用 rails 做个论坛，呵呵。
感谢楼上的肯定。
#108 楼 @coder_zzx Ruby 的学习资料我没有太多，这里有一些 Rails 的资料 http://railsgirlschina.org/topics/64
另：我只是个普普通通的开发者 :)
chenge
#110
September 17, 2015
#108 楼 @coder_zzx 学 ruby 可以试试我的这个：http://blog.csdn.net/freeagle/article/details/46659351
hxygsh
#117
September 25, 2015
看第一章 第三节
执行：rails g scaffold product name price:decimal description:text
出现错误提示：.rvm/gems/[email protected]/gems/less-rails-2.7.0/lib/less/rails/railtie.rb:19:in block in <class:Railtie>': undefined methodregister_preprocessor' for nil:NilClass (NoMethodError)
楼主能帮看看吗？试了半天过不去啊
#117 楼 @hxygsh 请重新 bundle install 试试，或者 clone 这个代码试试 https://github.com/liwei78/rails-practice-code/tree/master/chapter_1/shop
http://download.csdn.net/detail/xia4o/9148459 微软 2015 校园招聘 笔试题.rar
liwei78
#133
October 25, 2015
#132 楼 @775343518 暂时没有计划出纸质书，目前的重点是积累经验，对于非技术的事情木有计划。
写书还是新手，最近看了很多书，也学到很多写作技巧，在完成最近的开发任务后，会对书里的内容做一个整理和增补的 :)
再次感谢楼上各位的关注和鼓励，谢谢大家。
@liwei78 3.3 以后的代码在 ruby2.2.1,rails4.2.5 下貌似都报错 variable @ glyphiconsEotPath is undefined 错误，是 gem 没更新吗？
midikang
#136
July 19, 2016
#61 楼 @liwei78 手册翻了好多好多遍之后，我感觉很多的知识点是可以通过某些形式串联起来的，于是就想系统的把感悟写出来。严重同意楼主的观点。 说一下我自己学习 Rails 的经历吧。
本人会 Java，之前完全没有接触过 Ruby/Rails
最初激起我学 rails 兴趣的是Cloud 9上的 Rails Tutorial 模板。 该模板基于Michael Hartl 的书 Ruby on Rails Tutorial，为用户提供了一下在线学习 Rails 的易用环境，无需为 Ruby/Rails/git/Heroku 等的安装为烦恼，所以这些在你创建了 workspace 后即可以使用。 我非常喜欢 Tutorial 系列的教程，可以按照教程中的步骤一步步实践，在学习 Rails 的同时，Micheal 还顺带教大家如何使用 git/bitbucket/heroku 这些非常流行的工具/平台。
