雷分頁問題

Question

很簡單分頁設置給我下面的錯誤：

NoMethodError in Projects#index 

Showing /users/MasterControl/div/ikon/app/views/projects/index.html.erb where line #32 raised: 

undefined method `current_page' for nil:NilClass 
Extracted source (around line #32): 

29: <br /> 
30: 
31: 
32: <%= paginate @products %> 
Rails.root: /users/MasterControl/div/ikon 

Application Trace | Framework Trace | Full Trace 
activesupport (3.0.7) lib/active_support/whiny_nil.rb:48:in `method_missing' 
kaminari (0.12.4) lib/kaminari/helpers/action_view_extension.rb:21:in `paginate' 
app/views/projects/index.html.erb:32:in `_app_views_projects_index_html_erb___59843737_2173384980_0' 
actionpack (3.0.7) lib/action_view/template.rb:135:in `send' 
actionpack (3.0.7) lib/action_view/template.rb:135:in `render' 
activesupport (3.0.7) lib/active_support/notifications.rb:54:in `instrument' 
actionpack (3.0.7) lib/action_view/template.rb:127:in `render' 
actionpack (3.0.7) lib/action_view/render/rendering.rb:59:in `_render_template' 
activesupport (3.0.7) lib/active_support/notifications.rb:52:in `instrument' 
activesupport (3.0.7) lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
activesupport (3.0.7) lib/active_support/notifications.rb:52:in `instrument' 
actionpack (3.0.7) lib/action_view/render/rendering.rb:56:in `_render_template' 
actionpack (3.0.7) lib/action_view/render/rendering.rb:26:in `render' 
actionpack (3.0.7) lib/abstract_controller/rendering.rb:115:in `_render_template' 
actionpack (3.0.7) lib/abstract_controller/rendering.rb:109:in `render_to_body' 
actionpack (3.0.7) lib/action_controller/metal/renderers.rb:47:in `render_to_body' 
actionpack (3.0.7) lib/action_controller/metal/compatibility.rb:55:in `render_to_body' 
actionpack (3.0.7) lib/abstract_controller/rendering.rb:102:in `render_to_string' 
actionpack (3.0.7) lib/abstract_controller/rendering.rb:93:in `render' 
actionpack (3.0.7) lib/action_controller/metal/rendering.rb:17:in `render' 
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:40:in `render' 
activesupport (3.0.7) lib/active_support/core_ext/benchmark.rb:5:in `ms' 
/usr/local/lib/ruby/1.8/benchmark.rb:308:in `realtime' 
activesupport (3.0.7) lib/active_support/core_ext/benchmark.rb:5:in `ms' 
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:40:in `render' 
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:78:in `cleanup_view_runtime' 
activerecord (3.0.7) lib/active_record/railties/controller_runtime.rb:15:in `cleanup_view_runtime' 
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:39:in `render' 
actionpack (3.0.7) lib/action_controller/metal/implicit_render.rb:14:in `default_render' 
actionpack (3.0.7) lib/action_controller/metal/mime_responds.rb:261:in `retrieve_response_from_mimes' 
actionpack (3.0.7) lib/action_controller/metal/mime_responds.rb:192:in `call' 
actionpack (3.0.7) lib/action_controller/metal/mime_responds.rb:192:in `respond_to' 
app/controllers/projects_controller.rb:8:in `index' 
actionpack (3.0.7) lib/action_controller/metal/implicit_render.rb:5:in `send_action' 
actionpack (3.0.7) lib/action_controller/metal/implicit_render.rb:5:in `send_action' 
actionpack (3.0.7) lib/abstract_controller/base.rb:150:in `process_action' 
actionpack (3.0.7) lib/action_controller/metal/rendering.rb:11:in `process_action' 
actionpack (3.0.7) lib/abstract_controller/callbacks.rb:18:in `process_action' 
activesupport (3.0.7) lib/active_support/callbacks.rb:441:in `_run__46567664__process_action__199225275__callbacks' 
activesupport (3.0.7) lib/active_support/callbacks.rb:410:in `send' 
activesupport (3.0.7) lib/active_support/callbacks.rb:410:in `_run_process_action_callbacks' 
activesupport (3.0.7) lib/active_support/callbacks.rb:94:in `send' 
activesupport (3.0.7) lib/active_support/callbacks.rb:94:in `run_callbacks' 
actionpack (3.0.7) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
activesupport (3.0.7) lib/active_support/notifications.rb:52:in `instrument' 
activesupport (3.0.7) lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
activesupport (3.0.7) lib/active_support/notifications.rb:52:in `instrument' 
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
actionpack (3.0.7) lib/action_controller/metal/rescue.rb:17:in `process_action' 
actionpack (3.0.7) lib/abstract_controller/base.rb:119:in `process' 
actionpack (3.0.7) lib/abstract_controller/rendering.rb:41:in `process' 
actionpack (3.0.7) lib/action_controller/metal.rb:138:in `dispatch' 
actionpack (3.0.7) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' 
actionpack (3.0.7) lib/action_controller/metal.rb:178:in `action' 
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in `call' 
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in `dispatch' 
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:27:in `call' 
rack-mount (0.6.14) lib/rack/mount/route_set.rb:148:in `call' 
rack-mount (0.6.14) lib/rack/mount/code_generation.rb:93:in `recognize' 
rack-mount (0.6.14) lib/rack/mount/code_generation.rb:75:in `optimized_each' 
rack-mount (0.6.14) lib/rack/mount/code_generation.rb:92:in `recognize' 
rack-mount (0.6.14) lib/rack/mount/route_set.rb:139:in `call' 
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:493:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/head.rb:14:in `call' 
rack (1.2.3) lib/rack/methodoverride.rb:24:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/flash.rb:182:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/session/abstract_store.rb:149:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/cookies.rb:302:in `call' 
activerecord (3.0.7) lib/active_record/query_cache.rb:32:in `call' 
activerecord (3.0.7) lib/active_record/connection_adapters/abstract/query_cache.rb:28:in `cache' 
activerecord (3.0.7) lib/active_record/query_cache.rb:12:in `cache' 
activerecord (3.0.7) lib/active_record/query_cache.rb:31:in `call' 
activerecord (3.0.7) lib/active_record/connection_adapters/abstract/connection_pool.rb:354:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:46:in `call' 
activesupport (3.0.7) lib/active_support/callbacks.rb:416:in `_run_call_callbacks' 
actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:44:in `call' 
rack (1.2.3) lib/rack/sendfile.rb:107:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call' 
railties (3.0.7) lib/rails/rack/logger.rb:13:in `call' 
rack (1.2.3) lib/rack/runtime.rb:17:in `call' 
activesupport (3.0.7) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
rack (1.2.3) lib/rack/lock.rb:11:in `call' 
rack (1.2.3) lib/rack/lock.rb:11:in `synchronize' 
rack (1.2.3) lib/rack/lock.rb:11:in `call' 
actionpack (3.0.7) lib/action_dispatch/middleware/static.rb:30:in `call' 
railties (3.0.7) lib/rails/application.rb:168:in `call' 
railties (3.0.7) lib/rails/application.rb:77:in `send' 
railties (3.0.7) lib/rails/application.rb:77:in `method_missing' 
railties (3.0.7) lib/rails/rack/log_tailer.rb:14:in `call' 
rack (1.2.3) lib/rack/content_length.rb:13:in `call' 
rack (1.2.3) lib/rack/handler/webrick.rb:52:in `service' 
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' 
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' 
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' 
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start' 
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' 
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start' 
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `each' 
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start' 
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start' 
/usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start' 
rack (1.2.3) lib/rack/handler/webrick.rb:13:in `run' 
rack (1.2.3) lib/rack/server.rb:217:in `start' 
railties (3.0.7) lib/rails/commands/server.rb:65:in `start' 
railties (3.0.7) lib/rails/commands.rb:30 
railties (3.0.7) lib/rails/commands.rb:27:in `tap' 
railties (3.0.7) lib/rails/commands.rb:27 
script/rails:6:in `require' 
script/rails:6 

控制器：

def index 
@projects = Project.order("created_at").page(params[:page]).per(2) 

respond_to do |format| 
    format.html # index.html.erb 
    format.xml { render :xml => @projects } 
end 

末

索引視圖：

<%= paginate @products, :window => 3 %> 

不知道這裏的問題在哪裏d很難理解錯誤，我會很樂意爲您提供幫助！

Answer 1

@products != @projects

無論您使用的是錯誤的看法或你剛剛摸索集合名稱。