该算个特别基础的问题了... Google 了好久也没找到应该是没人像我这么笨
current = User.find(id)
取得 current 之后想要读取这个记录中 username 的内容.. 应该怎么做 尝试用 current.username 报错 之前代码少的时候是这样
current.each do |current_user|
id = current_user.id
session[:id] = id
end
代码一多就特别繁琐，这里应该是有更简单的方法..但是我没找到
thanks!
NoMethodError - undefined method `username' for #<User::ActiveRecord_Relation:0x000000037468c0>:
/home/yushao/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.0/lib/active_record/relation/delegation.rb:136:in `method_missing'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.0/lib/active_record/relation/delegation.rb:99:in `method_missing'
game.rb:77:in `block in <class:Game>'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1603:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1603:in `block in compile!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:966:in `[]'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:966:in `block (3 levels) in route!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:985:in `route_eval'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:966:in `block (2 levels) in route!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1006:in `block in process_route'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1004:in `catch'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1004:in `process_route'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:964:in `block in route!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:963:in `each'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:963:in `route!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1076:in `block in dispatch!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `block in invoke'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `catch'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `invoke'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1073:in `dispatch!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:898:in `block in call!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `block in invoke'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `catch'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `invoke'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:898:in `call!'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:886:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/xss_header.rb:18:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/base.rb:49:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/base.rb:49:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/path_traversal.rb:16:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/json_csrf.rb:18:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/base.rb:49:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/base.rb:49:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-protection-1.5.0/lib/rack/protection/frame_options.rb:31:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:225:in `context'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:220:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-1.6.0/lib/rack/nulllogger.rb:9:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/rack-1.6.0/lib/rack/head.rb:13:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/show_exceptions.rb:21:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:180:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:2014:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1478:in `block in call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1788:in `synchronize'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1478:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/thin-1.6.3/lib/thin/connection.rb:86:in `block in pre_process'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/thin-1.6.3/lib/thin/connection.rb:84:in `catch'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/thin-1.6.3/lib/thin/connection.rb:84:in `pre_process'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/eventmachine-1.0.3/lib/eventmachine.rb:1037:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/eventmachine-1.0.3/lib/eventmachine.rb:1037:in `block in spawn_threadpool'
Unexpected error while processing request: undefined method `join' for #<String:0x007fd98855e538>
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/show_exceptions.rb:37:in `rescue in call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/show_exceptions.rb:21:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:180:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:2014:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1478:in `block in call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1788:in `synchronize'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/sinatra-1.4.5/lib/sinatra/base.rb:1478:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/thin-1.6.3/lib/thin/connection.rb:86:in `block in pre_process'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/thin-1.6.3/lib/thin/connection.rb:84:in `catch'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/thin-1.6.3/lib/thin/connection.rb:84:in `pre_process'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/eventmachine-1.0.3/lib/eventmachine.rb:1037:in `call'
/home/yushao/.rvm/gems/ruby-2.1.5/gems/eventmachine-1.0.3/lib/eventmachine.rb:1037:in `block in spawn_threadpool'
