我是Ruby和Sinatra的新手,我正在尝试学习它们。
这就是我的ruby代码(文件:ruby_test2.rb)
#!/usr/bin/ruby
require 'rubygems'
class LearnRuby
def initalize
@listen = Hash.new { |hash, key| hash[key] = []; }
end
def fill_listen(uid, mid)
@listen[uid]<<=mid
"In fill_listen #{@listen}\n"
end
end
这是我的Sinatra代码(文件:sinatra_test2.rb)
require 'sinatra'
require './ruby_test2'
if __FILE__ == $0
lr = LearnRuby.new
end
post '/listen' do
lr.fill_listen params[:uid] , params[:mid]
end
这就是我的运行方式。
ruby sinatra_test2.rb
<-启动服务器
curl --data "uid=u1&mid=m312" http://localhost:4567/listen
<-用于发布请求的卷曲命令
当我执行以上操作时,我收到此错误(在服务器和客户端(卷曲)端)
localhost - - [22/Mar/2014:22:54:19 IST] "POST /listen HTTP/1.1" 500 3770
- -> /listen
NoMethodError - undefined method `[]' for nil:NilClass:
<path>/ruby_test2.rb:11:in `fill_listen'
sinatra_test2.rb:9:in `block in <main>'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1593:in `call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1593:in `block in compile!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:957:in `[]'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:957:in `block (3 levels) in route!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:976:in `route_eval'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:957:in `block (2 levels) in route!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:997:in `block in process_route'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:995:in `catch'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:995:in `process_route'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:955:in `block in route!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:954:in `each'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:954:in `route!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1067:in `block in dispatch!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1049:in `block in invoke'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1049:in `catch'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1049:in `invoke'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1064:in `dispatch!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:889:in `block in call!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1049:in `block in invoke'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1049:in `catch'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1049:in `invoke'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:889:in `call!'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:877:in `call'
/var/lib/gems/1.9.1/gems/rack-protection-1.5.2/lib/rack/protection/xss_header.rb:18:in `call'
/var/lib/gems/1.9.1/gems/rack-protection-1.5.2/lib/rack/protection/path_traversal.rb:16:in `call'
/var/lib/gems/1.9.1/gems/rack-protection-1.5.2/lib/rack/protection/json_csrf.rb:18:in `call'
/var/lib/gems/1.9.1/gems/rack-protection-1.5.2/lib/rack/protection/base.rb:50:in `call'
/var/lib/gems/1.9.1/gems/rack-protection-1.5.2/lib/rack/protection/base.rb:50:in `call'
/var/lib/gems/1.9.1/gems/rack-protection-1.5.2/lib/rack/protection/frame_options.rb:31:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/logger.rb:15:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/commonlogger.rb:33:in `call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:217:in `call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:210:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/head.rb:11:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/show_exceptions.rb:21:in `call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:180:in `call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:2004:in `call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1469:in `block in call'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1778:in `synchronize'
/var/lib/gems/1.9.1/gems/sinatra-1.4.4/lib/sinatra/base.rb:1469:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/handler/webrick.rb:60:in `service'
/usr/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
/usr/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
/usr/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'
localhost - - [22/Mar/2014:22:54:51 IST] "POST /listen HTTP/1.1" 500 3770
我可能错过了一些小东西,但由于我刚刚开始学习这些技术,因此需要帮助。
提前致谢。
这是为您工作的示例,@listen
was nil,因为您拼写错误initalize
->initialize
require 'sinatra'
class LearnRuby
def initialize
@listen = {}
end
def fill_listen(uid, mid)
@listen[uid] = mid
"In fill_listen #{ @listen }\n"
end
end
post '/listen' do
lr = LearnRuby.new
lr.fill_listen(params[:uid], params[:mid])
end
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我来说两句