Question

我需要在我的dev db中更新一堆记录（200k），但是通过rails控制台运行查询会导致我的计算机出现阻塞（部分原因是控制台打印出查询结果）。

示例：

1.9.3p194 :083 > Player.first
 => #<Player id: 1, IsActive: false, IsVisible: false, FirstName: "Ovie", LastName: "Soko", HeightFeet: 6, HeightInches: 8, Weight: 210, Birthday: nil, Gender: "M", HometownCity: "London", HometownState: "", HometownZip: "", HometownCountry: "", HighSchoolId: "", HighSchoolIdTemp: 0, HighSchoolGradYear: "2009", CollegeYear: "", Redshirted: false, Transferred: false, CollegeId: "{299F909C-88D9-4D26-8ADC-3EC1A66168BB}", CollegeIdTemp: 844, CollegeGradYear: "2013", OtherAccountId: 0, PreviousCollegeId: 0, CurrentTeamId: 0, LateralRecommendationReason: "", LateralRecommendationLink: "", CreationDate: "2011-02-16 20:53:34.877000000", CreatedBy: "", LastModifiedDate: "2011-02-16 20:53:34.877000000", LastModifiedBy: "", TwitterLink: "", FacebookLink: "", PersonalWebsite: "", PlayerImage: "", FirstNameNickName: "", NeulionID: 0, OtherTeamID: 0, OtherSportTypeID: 0, SourceDataTypeID: 1, PlayerTypeID: 2, LoadID: "", SameNameTeammate: "", SameNameSchoolMate: "", SD_SportID: 0, SD_PlayerID: 0, ZeroNCAAStats: "", ModifiedByPythonGame: "", Missing2011: "", Transfer2011: "", RecruitingClass: "\r", created_at: nil, updated_at: nil, high_school_id: nil, high_school_name: nil, not_valid: nil, city_to_zip_id: nil, user_id: nil>

正如我们所看到的，打印200k记录将是没有bueno。

我在这里尝试了解决方案：Disable Rails SQL logging in console，但之后我仍然得到了日志输出。

1.9.3p194 :087 > old_logger = ActiveRecord::Base.logger
 => #<Logger:0x007feb04b8de58 @progname=nil, @level=1, @default_formatter=#<Logger::Formatter:0x007feb04b8dde0 @datetime_format=nil>, @formatter=#<Logger::SimpleFormatter:0x007feb04b8dc50 @datetime_format=nil>, @logdev=#<Logger::LogDevice:0x007feb04b8dcf0 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x007feb04b8dcc8 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x007feb04b8dc78>>>> 
1.9.3p194 :088 > ActiveRecord::Base.logger = nil
 => nil 
1.9.3p194 :089 > Player.first
 => #<Player id: 1, IsActive: false, IsVisible: false, FirstName: "Ovie", LastName: "Soko", HeightFeet: 6, HeightInches: 8, Weight: 210, Birthday: nil, Gender: "M", HometownCity: "London", HometownState: "", HometownZip: "", HometownCountry: "", HighSchoolId: "", HighSchoolIdTemp: 0, HighSchoolGradYear: "2009", CollegeYear: "", Redshirted: false, Transferred: false, CollegeId: "{299F909C-88D9-4D26-8ADC-3EC1A66168BB}", CollegeIdTemp: 844, CollegeGradYear: "2013", OtherAccountId: 0, PreviousCollegeId: 0, CurrentTeamId: 0, LateralRecommendationReason: "", LateralRecommendationLink: "", CreationDate: "2011-02-16 20:53:34.877000000", CreatedBy: "", LastModifiedDate: "2011-02-16 20:53:34.877000000", LastModifiedBy: "", TwitterLink: "", FacebookLink: "", PersonalWebsite: "", PlayerImage: "", FirstNameNickName: "", NeulionID: 0, OtherTeamID: 0, OtherSportTypeID: 0, SourceDataTypeID: 1, PlayerTypeID: 2, LoadID: "", SameNameTeammate: "", SameNameSchoolMate: "", SD_SportID: 0, SD_PlayerID: 0, ZeroNCAAStats: "", ModifiedByPythonGame: "", Missing2011: "", Transfer2011: "", RecruitingClass: "\r", created_at: nil, updated_at: nil, high_school_id: nil, high_school_name: nil, not_valid: nil, city_to_zip_id: nil, user_id: nil>

Rails 3.2.1是否有新的黑客攻击，或者我做错了什么？

Answer 1

您不必让控制台打印最后一个语句的结果。这是一个有点人为的例子，但你可以将你的最后陈述作为零：

irb(main):156:0> Player.update_all(:IsActive => true); nil

SQL (1.8ms)  UPDATE "players" SET "IsActive" = 't'
=> nil

Answer 2

我认为你做错了什么。 Player.all也会归还所有内容吗？我的猜测是你看到的输出可能是Rails主记录器而不是ActiveRecord记录器。

你可以在development.rb中将其中任何一个设置为nil。

修改

config.logger config.active_record.logger config.action_controller.logger config.action_view.logger config.action_mailer.logger config.active_resource.logger

禁用Rails 3.2.1控制台SQL日志记录

2 个答案: