关于自定义错误处理

最新推荐文章于 2022-01-21 11:07:50 发布

最新推荐文章于 2022-01-21 11:07:50 发布 · 268 阅读

文章标签：

在项目中很多情况希望能自定义处理某些异常情况，通常采用重写rescue_action方法。一般网上能看到的代码都是以下的形式：

[code]
def rescue_action(exception)
rescue_action_in_public(exception)
end

def rescue_action_in_public(exception)
logger.error("rescue_action_in_public executed")
case exception
when ActiveRecord::RecordNotFound, ActionController::RoutingError,
ActionController::UnknownAction,ActionController::UnknownAction
logger.error("404 displayed")
render(:file => "#{RAILS_ROOT}/public/404.rhtml",:layout=>'error',
:status => "404 Not Found")
else
logger.error("500 displayed")
render(:file => "#{RAILS_ROOT}/public/500.rhtml",:layout=>'error',
:status => "500 Error")
end
end
[/code]
这样经常会报：
uninitialized constant ActionWebService::Dispatcher::ActionController::RoutingError错误，解决的办法是在ActionController前加::，正确的格式应该如下：

[code]
case exception
when ActiveRecord::RecordNotFound, ::ActionController::RoutingError,
::ActionController::UnknownAction,::ActionController::UnknownAction
logger.error("404 displayed")
render(:file => "#{RAILS_ROOT}/public/404.rhtml",:layout=>'error',
:status => "404 Not Found")
else
logger.error("500 displayed")
render(:file => "#{RAILS_ROOT}/public/500.rhtml",:layout=>'error',
:status => "500 Error")
end
[/code]