关闭。这个问题是off-topic.它目前不接受答案。想改进这个问题吗?Updatethequestion所以它是on-topic用于堆栈溢出。关闭10年前。Improvethisquestion当我尝试rakedb:migrate时,出现以下错误:Thebundledmysql.rbdriverhasbeenremovedfromRails2.2.Pleaseinstallthemysqlgemandtryagain:geminstallmysql.rakeaborted!nosuchfiletoload--mysql当我尝试geminstallmysqlBuildingnative
问题:mysqlorderpositionDESCbutputfirstifposition="chef"我想降序排列,但先放一些东西。它的语法如何? 最佳答案 ORDERBYCASEWHENposition="chef"THEN0ELSE1END,positionDESC添加更多WHEN条件可以让您优先考虑一些位置ORDERBYCASEWHENposition="chef"THEN0--firstWHENposition="dogsbody"THEN99--lastELSE1END,positionDESC
我正在开发中使用Rails4.0.2测试这个很棒的gemOctopus。我创建了一个Slave数据库并配置了octopus如下(config>shards.yml):octopus:environments:-developmentreplicated:truefully_replicated:trueverify_connection:truedevelopment:slave1:host:192.168.1.12adapter:mysql2username:slave_readerpassword:my_passworddatabase:my_server_developmentr
我打算使用https://github.com/opscode-cookbooks/mysql但是当我运行vagrantprovision时找不到菜谱mysql的reciperuby,它会像这样返回。[2014-04-23T10:13:06+00:00]ERROR:Runningexceptionhandlers[2014-04-23T10:13:06+00:00]ERROR:Exceptionhandlerscomplete[2014-04-23T10:13:06+00:00]FATAL:Stacktracedumpedto/var/chef/cache/chef-stacktr
这是交易。$gem--version1.1.0$sudogeminstallmysql----with-mysql-config=/usr/local/mysql/bin/mysql_configBulkupdatingGemsourceindexfor:http://gems.rubyforge.org/ERROR:couldnotfindmysqllocallyorinarepository$sudogem更新UpdatinginstalledgemsBulkupdatingGemsourceindexfor:http://gems.rubyforge.org/UpdatingRe
我在DebianSqueeze上安装mysql2gem时遇到这个“常见”错误:geminstallmysql2Buildingnativeextensions.Thiscouldtakeawhile...ERROR:Errorinstallingmysql2:ERROR:Failedtobuildgemnativeextension./usr/local/rvm/rubies/ruby-1.9.2-p290/bin/rubyextconf.rbcheckingforrb_thread_blocking_region()...yescheckingforrb_wait_for_singl
当我尝试从Sequel连接到MySQL时。我收到这些错误:require'rubygems'require'sequel'DB=Sequel.connect(:adapter=>'mysql',:user=>'root',:host=>'localhost',:database=>'scanty',:password=>'xx')DB.tablesSequel::DatabaseConnectionError:NameErroruninitializedconstantMysql::CLIENT_MULTI_RESULTSfrom/opt/local/lib/ruby/gems/1.8
我正在将Rails应用程序从使用mysql(mysql2gem)转换为postgres(pggem)。使用mysql,ActiveRecord::Base.connection.select_value调用根据数据类型返回值,例如:>ActiveRecord::Base.connection.select_value("SELECTCOUNT(*)FROMerrors")=>86>ActiveRecord::Base.connection.select_value("SELECTexceptionFROMerrorswhereid=565")=>"TechTalk.Genome.Sql
ruby:1.8.7rails:2.3.8数据库:我的SQL数据库已创建,但当我迁移数据库时显示错误。所以如果有人可以帮助我解决这个问题,那对我来说很好。$rakedb:migrate[deprecated]I18n.enforce_available_localeswilldefaulttotrueinthefuture.IfyoureallywanttoskipvalidationofyourlocaleyoucansetI18n.enforce_available_locales=falsetoavoidthismessage.DEPRECATIONWARNING:Raketas
我正在尝试运行一个AWSCognito服务项目,我在其中添加了适用于iOS的AWSSDK,但在添加它并尝试运行它之后,它显示了如下图所示的错误ERROR:Couldnotfindavalidgem'cocoapods'(>=0)inanyrepository当我在互联网上抓取它并找到一些cocoapods安装说明时,在尝试之后我遇到了一些其他错误,如下所示aparajita:Objective-CAparajita$sudogeminstallcocoapodsPassword:/System/Library/Frameworks/Ruby.framework/Versions/2.0