未定義的方法`each_pair'用於：名稱：帶有Chartkick和jsapi.js的符號

Question

我一直在嘗試3天內調試此問題。似乎無法弄清楚什麼是引發此error..any幫助深表感謝..

我嘗試使用谷歌圖表和chartkick生成折線圖：

Events index.html.erb 

<h1>Events</h1> 


<%= line_chart @events.group(:name).count %> 

<%= line_chart @events.group_by_day(:created_at).count %> 

<table class="table"> 
    <tr> 
    <th>Name</th> 
    <th>Data</th> 
    <th>URI</th> 
    </tr> 
    <% @events.each do |event| %> 
     <tr> 
     <td><%= event.name %></td> 
     <td><%= event.data %></td> 
     <td><%= event.uri %></td> 
     <td><%= event.created_at.to_s(:long) %></td> 
     </tr> 
    <% end %> 
    </table> 

此行

<%= line_chart @events.group(:name).count %> 

不起作用。然而，當我做到以下幾點：

<%= line_chart @events.only(:name) %> 

圖表填充...

我的活動控制器如下：

class EventsController < ApplicationController 

    before_filter :authenticate_user! 

    def index 
    @domain = Domain.where(id: params[:domain_id]).first 
    @events = @domain.events 
    end 
end 

任何線索......可能是什麼問題？我目前正在使用Rails 4 + Mongoid 4.0.0。

我找不到指出此問題的任何資源..期待收到某人的消息。

這裏是我的堆棧跟蹤：

origin (2.1.1) lib/origin/pipeline.rb:101:in `evolve' 
origin (2.1.1) lib/origin/pipeline.rb:40:in `group' 
origin (2.1.1) lib/origin/aggregable.rb:44:in `block in group' 
origin (2.1.1) lib/origin/aggregable.rb:112:in `block in aggregation' 
origin (2.1.1) lib/origin/aggregable.rb:106:in `tap' 
origin (2.1.1) lib/origin/aggregable.rb:106:in `aggregation' 
origin (2.1.1) lib/origin/aggregable.rb:43:in `group' 
mongoid (4.0.0) lib/mongoid/relations/referenced/many.rb:413:in `public_send' 
mongoid (4.0.0) lib/mongoid/relations/referenced/many.rb:413:in `block in method_missing' 
mongoid (4.0.0) lib/mongoid/scopable.rb:239:in `with_scope' 
mongoid (4.0.0) lib/mongoid/relations/referenced/many.rb:412:in `method_missing' 
app/views/events/index.html.erb:4:in `_app_views_events_index_html_erb___334265416112498281_2178674640' 
actionpack (4.0.2) lib/action_view/template.rb:143:in `block in render' 
activesupport (4.0.2) lib/active_support/notifications.rb:161:in `instrument' 
actionpack (4.0.2) lib/action_view/template.rb:141:in `render' 
actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:49:in `block (2 levels) in render_template' 
actionpack (4.0.2) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument' 
activesupport (4.0.2) lib/active_support/notifications.rb:159:in `block in instrument' 
activesupport (4.0.2) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.0.2) lib/active_support/notifications.rb:159:in `instrument' 
actionpack (4.0.2) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument' 
actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:48:in `block in render_template' 
actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:56:in `render_with_layout' 
actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:47:in `render_template' 
actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:17:in `render' 
actionpack (4.0.2) lib/action_view/renderer/renderer.rb:42:in `render_template' 
actionpack (4.0.2) lib/action_view/renderer/renderer.rb:23:in `render' 
actionpack (4.0.2) lib/abstract_controller/rendering.rb:127:in `_render_template' 
actionpack (4.0.2) lib/action_controller/metal/streaming.rb:219:in `_render_template' 
actionpack (4.0.2) lib/abstract_controller/rendering.rb:120:in `render_to_body' 
actionpack (4.0.2) lib/action_controller/metal/rendering.rb:33:in `render_to_body' 
actionpack (4.0.2) lib/action_controller/metal/renderers.rb:26:in `render_to_body' 
actionpack (4.0.2) lib/abstract_controller/rendering.rb:97:in `render' 
actionpack (4.0.2) lib/action_controller/metal/rendering.rb:16:in `render' 
actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:41:in `block (2 levels) in render' 
activesupport (4.0.2) lib/active_support/core_ext/benchmark.rb:12:in `block in ms' 
/Users/shaunkoo/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/benchmark.rb:296:in `realtime' 
activesupport (4.0.2) lib/active_support/core_ext/benchmark.rb:12:in `ms' 
actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:41:in `block in render' 
actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:84:in `cleanup_view_runtime' 
actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:40:in `render' 
actionpack (4.0.2) lib/action_controller/metal/implicit_render.rb:10:in `default_render' 
actionpack (4.0.2) lib/action_controller/metal/implicit_render.rb:5:in `send_action' 
actionpack (4.0.2) lib/abstract_controller/base.rb:189:in `process_action' 
actionpack (4.0.2) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (4.0.2) lib/abstract_controller/callbacks.rb:18:in `block in process_action' 
activesupport (4.0.2) lib/active_support/callbacks.rb:423:in `_run__2814413906838894580__process_action__callbacks' 
activesupport (4.0.2) lib/active_support/callbacks.rb:80:in `run_callbacks' 
actionpack (4.0.2) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (4.0.2) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' 
activesupport (4.0.2) lib/active_support/notifications.rb:159:in `block in instrument' 
activesupport (4.0.2) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.0.2) lib/active_support/notifications.rb:159:in `instrument' 
actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
actionpack (4.0.2) lib/action_controller/metal/params_wrapper.rb:245:in `process_action' 
actionpack (4.0.2) lib/abstract_controller/base.rb:136:in `process' 
actionpack (4.0.2) lib/abstract_controller/rendering.rb:44:in `process' 
actionpack (4.0.2) lib/action_controller/metal.rb:195:in `dispatch' 
actionpack (4.0.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' 
actionpack (4.0.2) lib/action_controller/metal.rb:231:in `block in action' 
actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:80:in `call' 
actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:80:in `dispatch' 
actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:48:in `call' 
actionpack (4.0.2) lib/action_dispatch/journey/router.rb:71:in `block in call' 
actionpack (4.0.2) lib/action_dispatch/journey/router.rb:59:in `each' 
actionpack (4.0.2) lib/action_dispatch/journey/router.rb:59:in `call' 
actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:680:in `call' 
warden (1.2.3) lib/warden/manager.rb:35:in `block in call' 
warden (1.2.3) lib/warden/manager.rb:34:in `catch' 
warden (1.2.3) lib/warden/manager.rb:34: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 (4.0.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call' 
actionpack (4.0.2) 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 (4.0.2) lib/action_dispatch/middleware/cookies.rb:486:in `call' 
actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
activesupport (4.0.2) lib/active_support/callbacks.rb:373:in `_run__476741460211041699__call__callbacks' 
activesupport (4.0.2) lib/active_support/callbacks.rb:80:in `run_callbacks' 
actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (4.0.2) lib/action_dispatch/middleware/reloader.rb:64:in `call' 
actionpack (4.0.2) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' 
actionpack (4.0.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
actionpack (4.0.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
railties (4.0.2) lib/rails/rack/logger.rb:38:in `call_app' 
railties (4.0.2) lib/rails/rack/logger.rb:20:in `block in call' 
activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `block in tagged' 
activesupport (4.0.2) lib/active_support/tagged_logging.rb:25:in `tagged' 
activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `tagged' 
railties (4.0.2) lib/rails/rack/logger.rb:20:in `call' 
actionpack (4.0.2) lib/action_dispatch/middleware/request_id.rb:21:in `call' 
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call' 
rack (1.5.2) lib/rack/runtime.rb:17:in `call' 
activesupport (4.0.2) lib/active_support/cache/strategy/local_cache.rb:83:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
actionpack (4.0.2) lib/action_dispatch/middleware/static.rb:64:in `call' 
rack (1.5.2) lib/rack/sendfile.rb:112:in `call' 
railties (4.0.2) lib/rails/engine.rb:511:in `call' 
railties (4.0.2) lib/rails/application.rb:97:in `call' 
rack (1.5.2) lib/rack/content_length.rb:14:in `call' 
thin (1.6.2) lib/thin/connection.rb:86:in `block in pre_process' 
thin (1.6.2) lib/thin/connection.rb:84:in `catch' 
thin (1.6.2) lib/thin/connection.rb:84:in `pre_process' 
thin (1.6.2) lib/thin/connection.rb:53:in `process' 
thin (1.6.2) lib/thin/connection.rb:39:in `receive_data' 
eventmachine (1.0.3) lib/eventmachine.rb:187:in `run_machine' 
eventmachine (1.0.3) lib/eventmachine.rb:187:in `run' 
thin (1.6.2) lib/thin/backends/base.rb:73:in `start' 
thin (1.6.2) lib/thin/server.rb:162:in `start' 
rack (1.5.2) lib/rack/handler/thin.rb:16:in `run' 
rack (1.5.2) lib/rack/server.rb:264:in `start' 
railties (4.0.2) lib/rails/commands/server.rb:84:in `start' 
railties (4.0.2) lib/rails/commands.rb:76:in `block in <top (required)>' 
railties (4.0.2) lib/rails/commands.rb:71:in `tap' 
railties (4.0.2) lib/rails/commands.rb:71:in `<top (required)>' 
bin/rails:4:in `require' 
bin/rails:4:in `<main>' 

Answer 1

而不是使用Chartkick..I切換到谷歌圖表和它的工作就像一個魅力。似乎可能存在與Chartkick和Mongoid的兼容性問題，請參閱post：https://github.com/ankane/chartkick/issues/83