Question

我正在尝试使用MongoDB Ruby驱动程序通过mongoS从集群中提取信息。这就是我所做的。

@mongo_client = Mongo::Connection.new('mongoshost', 27320)
@db = @mongo_client.db("thedatabase")
@auth = @db.authenticate("username", "password")
if(@mongo_client)
  print "Successfully connected to mongos\n"
else
  print "Connection failed"
end
if(@auth == true)
  print "Auth successful\n"
else
print "Auth failed"
  end
collection = @db.collection("thecollection")
puts collection.find.to_a

当我运行它时，一切都会工作，直到它试图打印集合中的文档为止。这是我的输出：

C:\Code\whatever>ruby getdata.rb
Successfully connected to mongos
Auth successful
C:/Ruby200/lib/ruby/gems/2.0.0/gems/bson-1.9.2/lib/bson/bson_c.rb:24:in `deseria
lize': time must be positive (ArgumentError)
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/bson-1.9.2/lib/bson/bson_c.rb:2
4:in `deserialize'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/networkin
g.rb:223:in `read_documents'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/networkin
g.rb:169:in `receive'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/networkin
g.rb:133:in `receive_message'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/cursor.rb
:497:in `block in send_initial_query'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/util/logg
ing.rb:55:in `block in instrument'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/util/logg
ing.rb:20:in `instrument'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/util/logg
ing.rb:54:in `instrument'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/cursor.rb
:493:in `send_initial_query'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/cursor.rb
:478:in `refresh'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/cursor.rb
:124:in `next'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/cursor.rb
:290:in `each'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/cursor.rb
:314:in `to_a'
        from C:/Ruby200/lib/ruby/gems/2.0.0/gems/mongo-1.9.2/lib/mongo/cursor.rb
:314:in `to_a'
        from getdata.rb:27:in `<main>'

“时间必须是积极的”错误有一些搜索结果，但没有任何帮助我弄清楚问题是什么。这些文档中的一个字段确实为日期保留了一个负数，但我不确定为什么这是一个问题，因为它正在阅读它而不是写（例如，其中一个字段看起来像这样：{“md”：日期（-62135596800000）}）

这是驱动程序的问题，我的代码是坏的，还是我需要以另一种方式解决这个问题？我对红宝石很新，所以任何帮助都会受到赞赏！

Answer 1

您的数据很糟糕，正如您已经注意到的那样。问题是驱动程序试图将日期值（实际上只是BSON时间戳字段内的mongo数字）扩展为实际的DateTime对象。

当它在读取时尝试执行此操作时，数字无效且通胀失败。如果您修复了日期值，问题将得到纠正。

注意：如果在shell中执行此操作，请使用ISOate帮助程序输入正确的值。如果使用代码，则使用DateTime对象。不要使用字符串，因为你会进一步搞乱你的数据。

MongoDB Ruby驱动程序和mongoS

1 个答案: