我一直在碰到我认为是由于保留关键字冲突导致的异常错误。
例如，我有一个带有属性“gross_value”的许可模型当我的视图尝试检索@permit.gross_value时，我收到以下异常错误。但是，当我将属性重命名为@permit.value_gross（不更改任何其他内容）时，视图工作正常。我和其他属性名称有类似的问题。
我诊断异常的原因是否正确？我如何知道要避免此问题的关键字？
更新：在我尝试从“许可”模型访问属性“total_weight”时在控制台中，例如“Permit.first.total_weight”我收到“堆栈级太深”的错误消息。当我将属性从“total_weight”重命名为“total_weigh”时，它可以很好地工作，例如“Permit.first.total_weigh”。
重命名属性后，我仍然在尝试访问“Permit.first.total_weight”时收到堆栈级别太深的错误消息，这很奇怪，因为现在该属性不存在所以我希望得到“未定义的方法”错误和其他模特一样，例如“User.first.total_weight。”
现在我可以将我的属性重命名为“total_weigh” - 这解决了问题，一切运行顺利。我只是对推理以及我对保留关键字冲突的诊断是否正确感到好奇？
致命（异常重新进入）：
actionpack (5.0.1) lib/action_controller/metal/rescue.rb:23:in `rescue in process_action'
actionpack (5.0.1) lib/action_controller/metal/rescue.rb:20:in `process_action'
actionpack (5.0.1) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (5.0.1) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (5.0.1) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activesupport (5.0.1) lib/active_support/notifications.rb:164:in `instrument'
actionpack (5.0.1) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (5.0.1) lib/action_controller/metal/params_wrapper.rb:248:in `process_action'
activerecord (5.0.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (5.0.1) lib/abstract_controller/base.rb:126:in `process'
actionview (5.0.1) lib/action_view/rendering.rb:30:in `process'
actionpack (5.0.1) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (5.0.1) lib/action_controller/metal.rb:262:in `dispatch'
actionpack (5.0.1) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (5.0.1) lib/action_dispatch/routing/route_set.rb:32:in `serve'
actionpack (5.0.1) lib/action_dispatch/journey/router.rb:39:in `block in serve'
actionpack (5.0.1) lib/action_dispatch/journey/router.rb:26:in `each'
actionpack (5.0.1) lib/action_dispatch/journey/router.rb:26:in `serve'
actionpack (5.0.1) lib/action_dispatch/routing/route_set.rb:725:in `call'
rack (2.0.1) lib/rack/etag.rb:25:in `call'
rack (2.0.1) lib/rack/conditional_get.rb:25:in `call'
rack (2.0.1) lib/rack/head.rb:12:in `call'
rack (2.0.1) lib/rack/session/abstract/id.rb:222:in `context'
rack (2.0.1) lib/rack/session/abstract/id.rb:216:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/cookies.rb:613:in `call'
activerecord (5.0.1) lib/active_record/migration.rb:553:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
activesupport (5.0.1) lib/active_support/callbacks.rb:97:in `__run_callbacks__'
activesupport (5.0.1) lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
activesupport (5.0.1) lib/active_support/callbacks.rb:90:in `run_callbacks'
actionpack (5.0.1) lib/action_dispatch/middleware/callbacks.rb:36:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
web-console (3.1.1) lib/web_console/middleware.rb:131:in `call_app'
web-console (3.1.1) lib/web_console/middleware.rb:28:in `block in call'
web-console (3.1.1) lib/web_console/middleware.rb:18:in `catch'
web-console (3.1.1) lib/web_console/middleware.rb:18:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
railties (5.0.1) lib/rails/rack/logger.rb:36:in `call_app'
railties (5.0.1) lib/rails/rack/logger.rb:24:in `block in call'
activesupport (5.0.1) lib/active_support/tagged_logging.rb:69:in `block in tagged'
activesupport (5.0.1) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (5.0.1) lib/active_support/tagged_logging.rb:69:in `tagged'
railties (5.0.1) lib/rails/rack/logger.rb:24:in `call'
sprockets-rails (3.2.0) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/request_id.rb:24:in `call'
rack (2.0.1) lib/rack/method_override.rb:22:in `call'
rack (2.0.1) lib/rack/runtime.rb:22:in `call'
activesupport (5.0.1) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.1) lib/action_dispatch/middleware/static.rb:136:in `call'
rack (2.0.1) lib/rack/sendfile.rb:111:in `call'
railties (5.0.1) lib/rails/engine.rb:522:in `call'
puma (3.4.0) lib/puma/configuration.rb:224:in `call'
puma (3.4.0) lib/puma/server.rb:569:in `handle_request'
puma (3.4.0) lib/puma/server.rb:406:in `process_client'
puma (3.4.0) lib/puma/server.rb:271:in `block in run'
puma (3.4.0) lib/puma/thread_pool.rb:114:in `block in spawn_thread'
感谢您的帮助！
西蒙
答案 0 :(得分：0)
你在代码中进行任何递归调用吗？此错误通常意味着您已在代码中重新输入了递归调用。
检查你的回调（例如before_save，before_validation等），如果有的话，因为这些是常见的地方。