诊断 Rails 应用程序在元素更新时挂起

Question

在构建 Rails 应用程序来帮助小型酒店管理预订的过程中，我遇到了一个奇怪的应用程序挂起问题。 建立预订工作正常； 添加客人、将他们分配到房间等，没有问题。 然而，当商人去“确认”询问时，Mongrel却把我晾在一边。

预订的索引页面列出了当前查询和已确认的预订：

# reservations/index.html.erb

<% unless @reservations.empty? %>
<h2>Inquiries</h2><hr/><br/>
<%= render :partial => 'reservation', :collection => @reservations.reject { |r| r.confirmed } %>
<h2>Confirmed Reservations</h2><hr/><br/>
<%= render :partial => 'reservation', :collection => @reservations.reject { |r| not r.confirmed }  %>
<% else %>
<%= link_to 'Search for rooms', :action => 'index', :controller => 'search' %>
<% end %>

在预订部分本身中，调用确认/取消确认逻辑的位只是到控制器操作的直接链接：

# _reservation.html.erb

(<% unless reservation.confirmed? %>
    <%= link_to 'Confirm Reservation', :action => 'confirm', :id => reservation.id %>
<% else %>
    <%= link_to 'Unconfirm Reservation', :action => 'unconfirm', :id => reservation.id %>
<% end %>)

确认预订的控制器操作，映射到 PUT在我的路线中，看起来像这样：

def confirm
  puts "\n\n\nConfirming reservation #{params[:id]}..."
  @reservation = Reservation.find(params[:id])
  puts "Found reservation! Confirming..."
  @reservation[:confirmed] = true
  puts "Confirmed, saving..."
  respond_to do |wants|            
    if @reservation.save
      flash[:notice] = 'Reservation has been confirmed.'
      wants.html { redirect_to :action => 'index' }
    else
      wants.html { render :action => 'index' }
    end
  end    
end

“@reservation.save”就是诀窍。 每次肯定应用程序挂起。

有人可以帮助我了解这里发生了什么吗？

/更新：

通过使用控制台，我能够以另一种方式演示该问题：

?> r = Reservation.find(36)
=> #<Reservation id: 36, customer_name: "buyer", customer_email: "[email protected]", begin: "2009-06-22 00:00:00", end: "2009-06-26 00:00:00", request_timestamp: nil, notes: "Thanks!", created_at: "2009-06-13 20:36:50", updated_at: "2009-06-13 20:36:50", yacht_id: 7, adults: 1, children: 0, buyer_id: 3, confirmed: nil>
>> r.confirmed = true
=> true
>> r
=> #<Reservation id: 36, customer_name: "buyer", customer_email: "[email protected]", begin: "2009-06-22 00:00:00", end: "2009-06-26 00:00:00", request_timestamp: nil, notes: "Thanks!", created_at: "2009-06-13 20:36:50", updated_at: "2009-06-13 20:36:50", yacht_id: 7, adults: 1, children: 0, buyer_id: 3, confirmed: true>
>> r.save!
IRB::Abort: abort then interrupt!!
    from C:/Ruby/lib/ruby/1.8/irb.rb:81:in `irb_abort'
    from C:/Ruby/lib/ruby/1.8/irb.rb:247:in `signal_handle'
    from C:/Ruby/lib/ruby/1.8/irb.rb:66:in `start'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:275:in `call'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:275:in `run_callbacks'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:344:in `callback'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:318:in `valid?'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_proxy.rb:221:in `send'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_proxy.rb:221:in `method_missing'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:906:in `validates_associated'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:906:in `collect'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:906:in `validates_associated'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:399:in `validates_each'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:396:in `each'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:396:in `validates_each'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:182:in `call'
 ... 2204 levels...
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `run'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `each'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `send'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:90:in `run'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:276:in `run_callbacks'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:1029:in `valid_without_callbacks?'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:315:in `valid?'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:1018:in `save_without_dirty!'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/dirty.rb:87:in `save_without_transactions!'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:200:in `save!'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in `transaction'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:182:in `transaction'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:200:in `save!'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:208:in `rollback_active_record_state!'
    from C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:200:in `save!'
    from (irb):5>>

请注意，控制台也被锁定，我不得不中止保存！ 使用 Ctrl-C 命令。

到底为什么要拯救！ 正在做这个？

/更新：

明白了！！！ 它在我的模型中。 我试图验证一个关联，但我已经得到了 has_many/belongs_to 的东西。

感谢大家！

Answer 1

您的问题可能是这样的：

@reservation[:confirmed] = true

您直接更新属性哈希，这有点奇怪。 通常，您只需更新属性即可。

@reservation.confirmed = true

之前当我弄乱属性哈希时，我遇到过奇怪的问题。 尤其是布尔值 - 也许是因为发生了某种类型的强制。

Answer 2

使用 thin而不是杂种。 从您的日志中发布更多详细信息。 它通常不会像这样挂起来。