Rails：无法呈现页面，导致JSON解析错误
我正在使用一个使用Rails服务器的项目，同时使用JSPM来组织Javascript文件，同时还使用Sprockets来管道资产。
我的rails服务器工作正常，但我目前无法呈现任何视图。 我认为这与sprockets没有成功管理编译JavaScript的处理器有关。 （另外需要注意：JavaScript是ES6）。 下面的错误似乎是说服务器尝试呈现索引页面，但JSON不存在，因为JS没有编译（我的猜测）。 这说，我真的不知道如何解决这个问题。
错误如下：
`JSON::ParserError in Application#index Showing /Users/ben/agora/app/views/layouts/application.html.erb where line #14 raised: A JSON text must at least contain two octets! (in /Users/ben/agora/app/assets/javascripts/bundles/application.js.sfx) Extracted source (around line #14): 11: 12: 13: 14: 15: 16: ` 完整堆栈跟踪如下：
`json (1.8.2) lib/json/common.rb:155:in `initialize' json (1.8.2) lib/json/common.rb:155:in `new' json (1.8.2) lib/json/common.rb:155:in `parse' vendor/gems/jspm-rails/lib/jspm/sfx/template.rb:30:in `block in evaluate' /Users/ben/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/open3.rb:199:in `popen_run' /Users/ben/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/open3.rb:93:in `popen3' vendor/gems/jspm-rails/lib/jspm/sfx/template.rb:24:in `evaluate' tilt (1.4.1) lib/tilt/template.rb:103:in `render' sprockets (2.2.3) lib/sprockets/context.rb:193:in `block in evaluate' sprockets (2.2.3) lib/sprockets/context.rb:190:in `each' sprockets (2.2.3) lib/sprockets/context.rb:190:in `evaluate' sprockets (2.2.3) lib/sprockets/processed_asset.rb:12:in `initialize' sprockets (2.2.3) lib/sprockets/base.rb:249:in `new' sprockets (2.2.3) lib/sprockets/base.rb:249:in `block in build_asset' sprockets (2.2.3) lib/sprockets/base.rb:270:in `circular_call_protection' sprockets (2.2.3) lib/sprockets/base.rb:248:in `build_asset' sprockets (2.2.3) lib/sprockets/index.rb:93:in `block in build_asset' sprockets (2.2.3) lib/sprockets/caching.rb:19:in `cache_asset' sprockets (2.2.3) lib/sprockets/index.rb:92:in `build_asset' sprockets (2.2.3) lib/sprockets/base.rb:169:in `find_asset' sprockets (2.2.3) lib/sprockets/index.rb:60:in `find_asset' sprockets (2.2.3) lib/sprockets/bundled_asset.rb:16:in `initialize' sprockets (2.2.3) lib/sprockets/base.rb:252:in `new' sprockets (2.2.3) lib/sprockets/base.rb:252:in `build_asset' sprockets (2.2.3) lib/sprockets/index.rb:93:in `block in build_asset' sprockets (2.2.3) lib/sprockets/caching.rb:19:in `cache_asset' sprockets (2.2.3) lib/sprockets/index.rb:92:in `build_asset' sprockets (2.2.3) lib/sprockets/base.rb:169:in `find_asset' sprockets (2.2.3) lib/sprockets/index.rb:60:in `find_asset' sprockets (2.2.3) lib/sprockets/environment.rb:78:in `find_asset' sprockets (2.2.3) lib/sprockets/base.rb:177:in `[]' actionpack (3.2.18) lib/sprockets/helpers/rails_helper.rb:126:in `asset_for' actionpack (3.2.18) lib/sprockets/helpers/rails_helper.rb:27:in `block in javascript_include_tag' actionpack (3.2.18) lib/sprockets/helpers/rails_helper.rb:26:in `collect' actionpack (3.2.18) lib/sprockets/helpers/rails_helper.rb:26:in `javascript_include_tag' app/views/layouts/application.html.erb:14:in `_app_views_layouts_application_html_erb___4438127222864099562_70202749532280' actionpack (3.2.18) lib/action_view/template.rb:145:in `block in render' activesupport (3.2.18) lib/active_support/notifications.rb:125:in `instrument' actionpack (3.2.18) lib/action_view/template.rb:143:in `render' actionpack (3.2.18) lib/action_view/renderer/template_renderer.rb:59:in `render_with_layout' actionpack (3.2.18) lib/action_view/renderer/template_renderer.rb:45:in `render_template' actionpack (3.2.18) lib/action_view/renderer/template_renderer.rb:18:in `render' actionpack (3.2.18) lib/action_view/renderer/renderer.rb:36:in `render_template' actionpack (3.2.18) lib/action_view/renderer/renderer.rb:17:in `render' actionpack (3.2.18) lib/abstract_controller/rendering.rb:110:in `_render_template' actionpack (3.2.18) lib/action_controller/metal/streaming.rb:225:in `_render_template' actionpack (3.2.18) lib/abstract_controller/rendering.rb:103:in `render_to_body' actionpack (3.2.18) lib/action_controller/metal/renderers.rb:28:in `render_to_body' actionpack (3.2.18) lib/action_controller/metal/compatibility.rb:50:in `render_to_body' actionpack (3.2.18) lib/abstract_controller/rendering.rb:88:in `render' actionpack (3.2.18) lib/action_controller/metal/rendering.rb:16:in `render' actionpack (3.2.18) lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render' activesupport (3.2.18) lib/active_support/core_ext/benchmark.rb:5:in `block in ms' /Users/ben/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/benchmark.rb:303:in `realtime' activesupport (3.2.18) lib/active_support/core_ext/benchmark.rb:5:in `ms' actionpack (3.2.18) lib/action_controller/metal/instrumentation.rb:40:in `block in render' actionpack (3.2.18) lib/action_controller/metal/instrumentation.rb:83:in `cleanup_view_runtime' sequel-rails (0.9.11) lib/sequel_rails/railties/controller_runtime.rb:24:in `cleanup_view_runtime' actionpack (3.2.18) lib/action_controller/metal/instrumentation.rb:39:in `render' app/controllers/application_controller.rb:7:in `index' actionpack (3.2.18) lib/action_controller/metal/implicit_render.rb:4:in `send_action' actionpack (3.2.18) lib/abstract_controller/base.rb:167:in `process_action' actionpack (3.2.18) lib/action_controller/metal/rendering.rb:10:in `process_action' actionpack (3.2.18) lib/abstract_controller/callbacks.rb:18:in `block in process_action' activesupport (3.2.18) lib/active_support/callbacks.rb:414:in `_run__749368673318476381__process_action__3475398207843127101__callbacks' activesupport (3.2.18) lib/active_support/callbacks.rb:405:in `__run_callback' activesupport (3.2.18) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks' activesupport (3.2.18) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (3.2.18) lib/abstract_controller/callbacks.rb:17:in `process_action' actionpack (3.2.18) lib/action_controller/metal/rescue.rb:29:in `process_action' actionpack (3.2.18) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' activesupport (3.2.18) lib/active_support/notifications.rb:123:in `block in instrument' activesupport (3.2.18) lib/active_support/notifications/instrumenter.rb:20:in `instrument' activesupport (3.2.18) lib/active_support/notifications.rb:123:in `instrument' actionpack (3.2.18) lib/action_controller/metal/instrumentation.rb:29:in `process_action' actionpack (3.2.18) lib/action_controller/metal/params_wrapper.rb:207:in `process_action' sequel-rails (0.9.11) lib/sequel_rails/railties/controller_runtime.rb:18:in `process_action' actionpack (3.2.18) lib/abstract_controller/base.rb:121:in `process' actionpack (3.2.18) lib/abstract_controller/rendering.rb:45:in `process' actionpack (3.2.18) lib/action_controller/metal.rb:203:in `dispatch' actionpack (3.2.18) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' actionpack (3.2.18) lib/action_controller/metal.rb:246:in `block in action' actionpack (3.2.18) lib/action_dispatch/routing/route_set.rb:73:in `call' actionpack (3.2.18) lib/action_dispatch/routing/route_set.rb:73:in `dispatch' actionpack (3.2.18) lib/action_dispatch/routing/route_set.rb:36:in `call' journey (1.0.4) lib/journey/router.rb:68:in `block in call' journey (1.0.4) lib/journey/router.rb:56:in `each' journey (1.0.4) lib/journey/router.rb:56:in `call' actionpack (3.2.18) lib/action_dispatch/routing/route_set.rb:608:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' rack (1.4.5) lib/rack/etag.rb:23:in `call' rack (1.4.5) lib/rack/conditionalget.rb:25:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/head.rb:14:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/params_parser.rb:21:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/flash.rb:242:in `call' rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context' rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/cookies.rb:341:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call' activesupport (3.2.18) lib/active_support/callbacks.rb:405:in `_run__103614042811221451__call__1909597293413008327__callbacks' activesupport (3.2.18) lib/active_support/callbacks.rb:405:in `__run_callback' activesupport (3.2.18) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' activesupport (3.2.18) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (3.2.18) lib/action_dispatch/middleware/callbacks.rb:27:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/reloader.rb:65:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' railties (3.2.18) lib/rails/rack/logger.rb:32:in `call_app' railties (3.2.18) lib/rails/rack/logger.rb:16:in `block in call' activesupport (3.2.18) lib/active_support/tagged_logging.rb:22:in `tagged' railties (3.2.18) lib/rails/rack/logger.rb:16:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/request_id.rb:22:in `call' rack (1.4.5) lib/rack/methodoverride.rb:21:in `call' rack (1.4.5) lib/rack/runtime.rb:17:in `call' activesupport (3.2.18) lib/active_support/cache/strategy/local_cache.rb:72:in `call' rack (1.4.5) lib/rack/lock.rb:15:in `call' actionpack (3.2.18) lib/action_dispatch/middleware/static.rb:63:in `call' railties (3.2.18) lib/rails/engine.rb:484:in `call' railties (3.2.18) lib/rails/application.rb:231:in `call' rack (1.4.5) lib/rack/content_length.rb:14:in `call' railties (3.2.18) lib/rails/rack/log_tailer.rb:17:in `call' thin (1.6.3) lib/thin/connection.rb:86:in `block in pre_process' thin (1.6.3) lib/thin/connection.rb:84:in `catch' thin (1.6.3) lib/thin/connection.rb:84:in `pre_process' thin (1.6.3) lib/thin/connection.rb:53:in `process' thin (1.6.3) lib/thin/connection.rb:39:in `receive_data' eventmachine (1.0.7) lib/eventmachine.rb:187:in `run_machine' eventmachine (1.0.7) lib/eventmachine.rb:187:in `run' thin (1.6.3) lib/thin/backends/base.rb:73:in `start' thin (1.6.3) lib/thin/server.rb:162:in `start' rack (1.4.5) lib/rack/handler/thin.rb:13:in `run' rack (1.4.5) lib/rack/server.rb:268:in `start' railties (3.2.18) lib/rails/commands/server.rb:70:in `start' railties (3.2.18) lib/rails/commands.rb:55:in `block in ' railties (3.2.18) lib/rails/commands.rb:50:in `tap' railties (3.2.18) lib/rails/commands.rb:50:in `' script/rails:6:in `require' script/rails:6:in `'`
需要为此查看gemfile。 猜测是你缺少JS运行时导致JS没有编译导致缺少JSON。
请看： 在application.html.erb中使用javascript_include_tag进行Rails 3.1问题 （来自@Confusion）
您应该升级ruby以解决此问题。