Question

我最近从ruby-aaws gem转移到了asin gem，这使用和理解起来要简单得多。但是，我遇到了一个非常奇怪的问题，导致特定查询的搜索失败，并且仅在heroku上。

我的代码如下：

require 'asin'

client = ASIN::Client.instance

client.search(:Keywords => "Shark Tale", :SearchIndex => :UnboxVideo, :ResponseGroup => :ItemAttributes)

当它在我的本地盒子上运行时，它完美无缺。但是，当我在heroku上运行时，我看到以下错误日志：

REXML::ParseException: #<NoMethodError: undefined method `[]' for nil:NilClass>
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:340:in `pull_event'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:183:in `pull'
/app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:203:in `parse'
/app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:235:in `parse'
/app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:375:in `call'
/app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:197:in `search'
(irb):223:in `irb_binding'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/workspace.rb:86:in `eval'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/workspace.rb:86:in `evaluate'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/context.rb:380:in `evaluate'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:492:in `block (2 levels) in eval_input'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:624:in `signal_status'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:489:in `block in eval_input'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:247:in `block (2 levels) in each_top_level_statement'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:233:in `loop'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:233:in `block in each_top_level_statement'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:232:in `catch'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb/ruby-lex.rb:232:in `each_top_level_statement'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:488:in `eval_input'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:397:in `block in start'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:396:in `catch'
/app/vendor/ruby-2.0.0/lib/ruby/2.0.0/irb.rb:396:in `start'
/app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start'
/app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start'
/app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>'
script/rails:6:in `require'
script/rails:6:in `<main>'
...
Exception parsing
Line: 1
Position: 30315
Last 80 unconsumed characters:
Actor><Actor>Matthew Broderick</Actor><Actor>Patrick Warburton</Actor><Actor>J
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:439:in `rescue in pull_event'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:331:in `pull_event'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/rexml/parsers/baseparser.rb:183:in `pull'
from /app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:203:in `parse'
from /app/vendor/bundle/ruby/2.0.0/gems/crack-0.4.0/lib/crack/xml.rb:235:in `parse'
from /app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:375:in `call'
from /app/vendor/bundle/ruby/2.0.0/gems/asin-1.1.2/lib/asin/client.rb:197:in `search'
from (irb):223
from /app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

这在Heroku的10次中有9次失败。我尝试了一些变化，以下一些变体一直在成功：

稍微更改查询

client.search(:Keywords => "Shark Tales", :SearchIndex => :UnboxVideo, :ResponseGroup => :ItemAttributes)

更改ResponseGroup

client.search(:Keywords => "Shark Tale", :SearchIndex => :UnboxVideo, :ResponseGroup => :Offers)

有谁知道造成这种情况的原因是什么？

Answer 1

意识到我的本地盒子和heroku之间的差异是ruby版本。

我在本地方框上使用1.9.3，而我的heroku设置为2.0.0

这是来自asin gem的作者的2.0.0解决方案 http://asin.herokuapp.com/

ruby asin gem搜索在heroku上失败了

1 个答案: