我有一个Rack中间件,通过子域加载租户,并应用一些默认设置.中间件虽然不漂亮,但它的工作还不错.但是,当在应用程序中抛出异常时,中间件会“捕获”完整的堆栈跟踪.当我说陷阱时,我的意思是它隐藏了预期的堆栈跟踪.

这是一个例子.

我在控制器动作中抛出一个异常,如下所示：

def index
  throw "Exception in a Rails controller action"
  @taxonomies = Spree::Taxonomy.all
end

您可能希望堆栈跟踪引用此位置,但它不会.相反,它引用中间件中的一行.

Completed 500 Internal Server Error in 139ms

UncaughtThrowError (uncaught throw "Exception in a Rails controller action"):
lib/tenant_manager/middleware/loader.rb:42:in `call'

为什么会这样？你以前见过这样的吗？

这是中间件：

# lib/tenant_manager/middleware/loader.rb
module TenantManager
  module Middleware
    class Loader
    # Middleware to detect an tenant via subdomain early in
    # the request process
    #
    # Usage:
    #   # config/application.rb
    #   config.middleware.use TenantManager::Middleware::Loader
    #
    # A scaled down version of https://github.com/radar/houser

      def initialize(app)
        @app = app
      end

      def call(env)
        domain_parts = env['HTTP_HOST'].split('.')
        if domain_parts.length > 2
          subdomain = domain_parts.first
          tenant = Leafer::Tenant.find_by_database(subdomain)
          if tenant
            ENV['CURRENT_TENANT_ID'] = tenant.id.to_s
            ENV['RAILS_CACHE_ID'] = tenant.database
            Spree::Image.change_paths tenant.database
            Apartment::Tenant.process(tenant.database) do
              country = Spree::Country.find_by_name('United States')
              Spree.config do |config|
                config.default_country_id = country.id if country.present?
                config.track_inventory_levels = false
              end
              Spree::Auth::Config.set(:registration_step => false)
            end
          end
        else
          ENV['CURRENT_TENANT_ID'] = nil
          ENV['RAILS_CACHE_ID'] = ""
        end
        @app.call(env)
      end

    end
  end
end

我正在运行ruby 2.2.0p0和rails 4.1.8.

我已经在网上搜索了这个,但找不到任何东西,可能是因为我没有找到正确的东西.

有关为什么会发生这种情况以及我做错了什么的任何想法？

干杯!

# config/initializers/backtrace_silencers.rb
Rails.backtrace_cleaner.remove_silencers!
Rails.backtrace_cleaner.add_silencer { |line| line !~ /^\/(app|config|lib|test|components)/}