調試堆棧深度過深，在Ruby中

Question

我已經運行到堆棧層次過深（SystemStackError）錯誤Ruby程序，在DataMapper的結局：

from /usr/local/lib/ruby/gems/1.8/gems/dm-core-1.0.0/lib/dm-core/collection.rb:510:in `each' 
from /usr/local/lib/ruby/gems/1.8/gems/dm-core-1.0.0/lib/dm-core/query/conditions/comparison.rb:616:in `map' 
from /usr/local/lib/ruby/gems/1.8/gems/dm-core-1.0.0/lib/dm-core/query/conditions/comparison.rb:616:in `expected' 
from /usr/local/lib/ruby/gems/1.8/gems/dm-core-1.0.0/lib/dm-core/query/conditions/comparison.rb:461:in `matches?' 
from /usr/local/lib/ruby/gems/1.8/gems/dm-core-1.0.0/lib/dm-core/query/conditions/operation.rb:498:in `matches?' 
from /usr/local/lib/ruby/gems/1.8/gems/extlib-0.9.15/lib/extlib/inflection.rb:103:in `any?' 
from /usr/local/lib/ruby/gems/1.8/gems/dm-core-1.0.0/lib/dm-core/query/conditions/operation.rb:159:in `each' 
from /usr/local/lib/ruby/1.8/set.rb:195:in `each' 
... 5188 levels... 

有沒有辦法來調試嗎？就像查看隱藏的5188級別？ Ruby的調試無法幫助我，並內建紅寶石探查與死「[致命]無法分配內存」

Answer 1

的問題，除了尋找沒有註釋分析器，它可以處理棧溢出，被濫用的DataMapper lazyness

應用程序在另一個查詢（which is lazy as well）中查詢（也是懶惰）內部獲取文本屬性（which is lazy）。即使所有這些懶惰通常會將N + 1查詢轉換爲O（k）查詢（實際上通常意味着4個查詢），但事實證明這會導致堆棧溢出。

執行溢出測試作爲一個簡單的ruby腳本，在rake，rspec和netbeans環境之外，讓我更清楚地看到罪魁禍首。

仍然希望紅寶石輪廓儀可以幫助我。