state_machine gem与rails 4集成
我正在使用我的rails 4应用程序使用state_machine gem时遇到问题。 A有一个模型，其中包含列调用状态，如提供的rails教程http://gistflow.com/posts/679-state-machine-with-rails-basics中所述
但是当我定义我的state_machine时如下：
class Issue :new do state :new, value: 0 state :analysed, value: 1 state :assigned, value: 2 state :inprogress, value: 3 state :inreview, value: 4 state :validation, value: 5 state :resolved, value: 6 state :cancelled, value: 7 state :closed, value: 8 state :rejected, value: 9 state :reopened, value: 10 end def next Issue.where("id > ?", self.id).first || Issue.first end def prev Issue.where("id < ?", self.id).last || Issue.last end end 这是我的IssueConntroller
class IssuesController { :success => "Issue succesfully created." } } format.json {head :no_content} else format.html {render action: 'new'} format.json { render json: @issue.errors, status: :unprocessable_entity } end end end def show @note = Note.new @note.issue_id = @issue.id end def edit end def update respond_to do |format| if @issue.update(issue_params) format.html { redirect_to @issue, :flash => { :success => 'Issue was successfully updated.' }} format.json { head :no_content } else format.html { render action: 'edit' } format.json { render json: @issue.errors, status: :unprocessable_entity } end end end def destroy @issue.destroy flash[:error]= "Issue '#{@issue.title}' Deleted!" redirect_to issues_path end private def issue_params params.require(:issue).permit(:title, :description) end def find_issue @issue = Issue.find(params[:id]) end end
我陷入了一个未定义的方法`state_machine’，用于IssuesController #index中的＃NoMethodError。 当然我已经将gem’state_machine行添加到我的gemfile中并运行bundle install命令。 好像gem没有被rails应用程序加载……
谢谢你帮我解决这个问题;）
这是痕迹
activerecord (4.0.0) lib/active_record/dynamic_matchers.rb:22:in `method_missing' app/models/issue.rb:5:in `' app/models/issue.rb:1:in `' activesupport (4.0.0) lib/active_support/dependencies.rb:423:in `load' activesupport (4.0.0) lib/active_support/dependencies.rb:423:in `block in load_file' activesupport (4.0.0) lib/active_support/dependencies.rb:615:in `new_constants_in' activesupport (4.0.0) lib/active_support/dependencies.rb:422:in `load_file' activesupport (4.0.0) lib/active_support/dependencies.rb:323:in `require_or_load' activesupport (4.0.0) lib/active_support/dependencies.rb:462:in `load_missing_constant' activesupport (4.0.0) lib/active_support/dependencies.rb:183:in `const_missing' activesupport (4.0.0) lib/active_support/dependencies.rb:494:in `load_missing_constant' activesupport (4.0.0) lib/active_support/dependencies.rb:183:in `const_missing' app/controllers/issues_controller.rb:6:in `index' actionpack (4.0.0) lib/action_controller/metal/implicit_render.rb:4:in `send_action' actionpack (4.0.0) lib/abstract_controller/base.rb:189:in `process_action' actionpack (4.0.0) lib/action_controller/metal/rendering.rb:10:in `process_action' actionpack (4.0.0) lib/abstract_controller/callbacks.rb:18:in `block in process_action' activesupport (4.0.0) lib/active_support/callbacks.rb:413:in `_run__901873103026712443__process_action__callbacks' activesupport (4.0.0) lib/active_support/callbacks.rb:80:in `run_callbacks' actionpack (4.0.0) lib/abstract_controller/callbacks.rb:17:in `process_action' actionpack (4.0.0) lib/action_controller/metal/rescue.rb:29:in `process_action' actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' activesupport (4.0.0) lib/active_support/notifications.rb:159:in `block in instrument' activesupport (4.0.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument' activesupport (4.0.0) lib/active_support/notifications.rb:159:in `instrument' actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:30:in `process_action' actionpack (4.0.0) lib/action_controller/metal/params_wrapper.rb:245:in `process_action' activerecord (4.0.0) lib/active_record/railties/controller_runtime.rb:18:in `process_action' actionpack (4.0.0) lib/abstract_controller/base.rb:136:in `process' actionpack (4.0.0) lib/abstract_controller/rendering.rb:44:in `process' actionpack (4.0.0) lib/action_controller/metal.rb:195:in `dispatch' actionpack (4.0.0) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' actionpack (4.0.0) lib/action_controller/metal.rb:231:in `block in action' actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:80:in `call' actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:80:in `dispatch' actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:48:in `call' actionpack (4.0.0) lib/action_dispatch/journey/router.rb:71:in `block in call' actionpack (4.0.0) lib/action_dispatch/journey/router.rb:59:in `each' actionpack (4.0.0) lib/action_dispatch/journey/router.rb:59:in `call' actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:655:in `call' rack (1.5.2) lib/rack/etag.rb:23:in `call' rack (1.5.2) lib/rack/conditionalget.rb:25:in `call' rack (1.5.2) lib/rack/head.rb:11:in `call' actionpack (4.0.0) lib/action_dispatch/middleware/params_parser.rb:27:in `call' actionpack (4.0.0) lib/action_dispatch/middleware/flash.rb:241:in `call' rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context' rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call' actionpack (4.0.0) lib/action_dispatch/middleware/cookies.rb:486:in `call' activerecord (4.0.0) lib/active_record/query_cache.rb:36:in `call' activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in `call' activerecord (4.0.0) lib/active_record/migration.rb:369:in `call' actionpack (4.0.0) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' activesupport (4.0.0) lib/active_support/callbacks.rb:373:in `_run__77618213725076532__call__callbacks' activesupport (4.0.0) lib/active_support/callbacks.rb:80:in `run_callbacks' actionpack (4.0.0) lib/action_dispatch/middleware/callbacks.rb:27:in `call' actionpack (4.0.0) li/content_length.rb:14:in `call' rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service' /Users/sebmac/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' /Users/sebmac/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' /Users/sebmac/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'b/action_dispatch/middleware/static.rb:64:in `call' railties (4.0.0) lib/rails/engine.rb:511:in `call' railties (4.0.0) lib/rails/application.rb:97:in `call' rack (1.5.2) lib/rack/lock.rb:17:in `call' rack (1.5.2) lib/rack/content_length.rb:14:in `call' rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service' /Users/sebmac/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' /Users/sebmac/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' /Users/sebmac/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'
您的代码中没有问题，尝试在bundle之后重新加载SERVER ，不要忘记添加state:string或者“ ìnteger因为你使用了一个值来表示你的模型，当然同样的事件就像
event :add_new do transition new: :analysed end
作为状态机的定义：是一种状态转换到另一种状态
在rails c你可以为状态机调用一些方法
Issue.first.state_name Issue.first.state_events ....
如果你仍然有问题尝试解释更多:)