当我使用Ruby 1.9和Rails 2.3.4时，flash [：notice]抛出错误
[英]flash[:notice] is throwing error when I use Ruby 1.9 with Rails 2.3.4
问题描述
The Post pages I just generated using the scaffolding but they are not working When I try to access the New post page it give me the error. 
我刚刚使用脚手架生成的帖子页面，但它们不起作用当我尝试访问新帖子页面时，它给了我错误。
Here is My layout code 这是我的布局代码
<p style="color: green"><%= flash[:message] %></p>
<%= yield %>
Error that I get when i try to access the page 我尝试访问该页面时收到错误
Processing PostsController#new (for 127.0.0.1 at 2016-10-23 02:45:19) [GET]
Rendering template within layouts/posts
Rendering posts/new
ActionView::TemplateError (undefined method `^' for "4":String) on line #12 of app/views/layouts/posts.html.erb:
9: </head>
10: <body>
11:
12:p style="color: green"><%= flash[:message] %></p>
13:
14: <%= yield %>
15:
app/views/layouts/posts.html.erb:12
app/controllers/posts_controller.rb:29:in `new'
<internal:prelude>:10:in `synchronize'
/home/atta/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
/home/atta/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
/home/atta/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'
Here is the gem list that I am using with ruby 1.9 这是我使用ruby 1.9的gem列表
actionmailer (2.3.4)
actionpack (2.3.4)
activerecord (2.3.4)
activeresource (2.3.4)
activesupport (2.3.4)
bigdecimal (1.1.0)
bundler-unload (1.0.2)
executable-hooks (1.3.2)
gem-wrappers (1.2.7)
io-console (0.3)
json (1.5.5)
minitest (2.5.1)
rack (1.0.1)
rails (2.3.4)
rake (0.9.2.2)
rdoc (3.9.5)
rubygems-bundler (1.4.4)
rubygems-update (1.8.25)
rvm (1.11.3.9)
sqlite3 (1.3.12)
sqlite3-ruby (1.3.3)
Note: I also downgraded my RubyGems to 1.8.25 as newer was not working with db:create rake command 注意：我还将我的RubyGems降级为1.8.25，因为较新的不使用db：create rake命令
2 个解决方案
解决方案1
0 2016-10-22 22:29:13
In ruby 1.8 "abc"[0] returns ASCII code of the first character (integer number 97) but in ruby 1.9 it returns string with the first character (string "a") 在ruby 1.8中， "abc"[0]返回第一个字符的ASCII码（整数97）但在ruby 1.9中它返回带有第一个字符的字符串（字符串“a”）
Integer number has method ^ but String doesn't. 整数有方法^但字符串没有。
You can try the following to fix this: 您可以尝试以下方法来解决此问题：
class String
def ^(value)
self.ord ^ value
end
end
This is probably not the best solution (maybe better to patch some method in rails). 这可能不是最好的解决方案（可能更好地修补rails中的某些方法）。
解决方案2
0 2016-10-24 11:48:45
Downgrading the Rails from 2.3.4 to 2.3.18 and rubyGems to 1.8.25 will fix the problem. 将Rails从2.3.4降级到2.3.18并将rubyGems降级到1.8.25将解决问题。 Apparently Ruby 1.9.3 don't go well with 2.3.4 显然Ruby 1.9.3与2.3.4并不顺利
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