Altering the primary key in Rails to be a string
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: SoI'vegottwomodels,StateandAcquisition.Statehas_manyAcquisitions.Ifeltlikeanautoincrementingintegerprimarykeyfor51reco......
Best way to escape and unescape strings in Ruby?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: DoesRubyhaveanybuilt-inmethodforescapingandunescapingstrings?Inthepast,I'veusedregularexpressions;however,itoccurstome......
How does instance_eval work and why does DHH hate
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Ataboutthe19:00markinhisRailsConfpresentation,DavidHeinemeierHanssontalksaboutthedownsidesofinstance_eval: Foralongti......
How to handle Ruby on Rails error: “Please install
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: RunningaRubyonRails(RoR)apporRubycodewhichusestheActiveRecordframework,yougettheerrormessage: Pleaseinstallthepostg......
Nokogiri/Xpath namespace query
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I'mtryingtopulloutthedc:titleelementusinganxpath.Icanpulloutthemetadatausingthefollowingcode. doc=<<END <?xmlversion=......
Ruby's double colon (::) operator usage differ
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Isthereanydifferencebetween moduleFoo classEngine<Rails::Engine end end and moduleFoo classEngine<::Rails::Engine en......
ActiveRecord Arel OR condition
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Howcanyoucombine2differentconditionsusinglogicalORinsteadofAND? NOTE:2conditionsaregeneratedasrailsscopesandcan'tbeea......
Rails 5: ActiveRecord OR query
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: HowdoyoudoanorqueryinRails5ActiveRecord?Also,isitpossibletochainorwithwhereinActiveRecordqueries? 回答1: Theabilit......
How to get a single character without pressing ent
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: HowcanIgetasinglekeyboardcharacterfromtheterminalwithRubywithoutpressingenter? ItriedCurses::getch,butthatdidn'treallyw......
TZInfo::DataSourceNotFound error starting Rails v4
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IhavecreatedanewapplicationusingRubyonRailsv4.1.0.WhenattemptingtostartaserverorconsoleonWindows,Iamencounteringthef......
Ruby Style: How to check whether a nested hash ele
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Considera"person"storedinahash.Twoexamplesare: fred={:person=>{:name=>"Fred",:spouse=>"Wilma",:children=&...
incompatible character encodings: ASCII-8BIT and U
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IuseRuby1.9.2andRails3.0.5 Ihavethefollowingerror: incompatiblecharacterencodings:ASCII-8BITandUTF-8 Ithasnothingto......
How do I validate a date in rails?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IwanttovalidateadateinmymodelinRubyonRails,however,theday,monthandyearvaluesarealreadyconvertedintoanincorrectdate......
How do I install sqlite3 for Ruby on Windows?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: BeingreallynewtoRuby/Rails,andafterattemptingtoresolvetheissuemyselfthisweekendI'mmakinganattempttoseekadvicehere. Ih......
Best explanation of Ruby blocks? [closed]
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: WhatisthebestexplanationforRubyblocksthatyoucanshare? Bothusageandwritingcodethatcantakeablock? 回答1: Iofferupmy......
Access to current_user from within a model in Ruby
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Ineedtoimplementfine-grainedaccesscontrolinaRubyonRailsapp.Thepermissionsforindividualusersaresavedinadatabasetablean......
How can I get source code of a method dynamically
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IwouldliketoknowwhetherIcangetsourcecodeamethodonthefly,andwhetherIcangetwhichfileisthismethodin. like A.new.met......
How do I replace accented Latin characters in Ruby
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IhaveanActiveRecordmodel,Foo,whichhasanamefield.I'dlikeuserstobeabletosearchbyname,butI'dlikethesearchtoignoreca......
How to get a specific output iterating a hash in R
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IwanttogetaspecificoutputiteratingaRubyHash. ThisistheHashIwanttoiterateover: hash={ 1=>['a','b'], 2=>['c'],......
rhc setup gives error `no such file dl/import`
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I'minstallingopenshiftclienttoolsasdescribed:https://developers.openshift.com/en/getting-started-windows.html#client-tools. Onstep'S......
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