**migrate**:maɪɡretvi.迁移;随季而迁居;移往vt.使迁居;使移植构造辨析:migrate=migr(迁移)+ate(动词后缀)→迁移**migration**:maɪɡreʃənn.迁移;移民;运动构造辨析:migration=migr(迁移)+ation(动名词后缀)→迁移**migratory**:maɪɡrətɔriadj.迁移的;迁移的;流荡的构造辨析:migratory=migr(迁移)+atory(形容词后缀)→迁移的**migrant**:maɪɡrəntn.候鸟;迁移性众生;(为职业)迁居民;随季而迁移的雇工adj.迁移的;迁居的;流荡的构造辨析:migrant=migr(迁移)+ant(形容词后缀)→迁移的(人或众生)**immigrate**:ɪmɪɡretvi.迁入vt.使迁居入境构造辨析:immigrate=im(=in,入)+migr(迁移)+ate(动词后缀)→迁入**immigration**:,ɪmɪɡreʃənn.迁入;迁居入境构造辨析:immigration=im(=in,入)+migr(迁移)+ation(动名词后缀)→迁居入境**immigratory**:ɪməgrə,tɔriadj.迁入的;迁居入境的构造辨析:immigratory=im(=in,入)+migr(迁移)+atory(形容词后缀)→迁入的**immigrant**:ɪmɪɡrəntadj.移民的;迁入的n.移民,侨构造辨析:immigrant=im(=in,入)+migr(迁移)+ant(形容词后缀)→迁入的(人)**emigrate**:ɛmɪɡretvi.迁出;迁居外vt.移民构造辨析:emigrate=e(=ex,出)+migr(迁移)+ate(动词后缀)→迁出**emigration**:,ɛməgreʃənn.迁出;迁居离境;迁居外构造辨析:emigration=e(=ex,出)+migr(迁移)+ation(动名词后缀)→迁居离境**emigratory**:emiɡrətəriadj.迁出的;迁居离境的;迁居外的构造辨析:emigratory=e(=ex,出)+migr(迁移)+atory(形容词后缀)→迁出的**emigrant**:ɛmɪɡrəntn.(迁居海外的)移民;侨adj.迁出的;移民的;迁居的构造辨析:emigrant=e(=ex,出)+migr(迁移)+ant(形容词后缀)→迁出的(人)本站是供匹夫学问保管的网存储空中,一切情节均由用户宣布,不代替本站角度。

***新近在`r/reddit`中不止现出***我如何使用Go来完竣据库迁徙?***对我和大大部分人这种从其它言语比如PHP或是Ruby转到Go的人来说,数据库迁徙在这些言语上曾经不是何情况了。

**

!,在上一篇篇:应用python同步redis数据说明了如何应用python同步redis数据,该方式不得不全量同步,如其只想同步某些key就没辙兑现了,这一篇说明一个更简略的方式,应用redis自带的MIGRATE下令即可>这下令现实是默认在源库履行DUMP+DEL下令,在目标库履行RESTORE下令语法MIGRATEhostportkey|””destination-dbtimeoutCOPYREPLACEAUTHpasswordAUTH2usernamepasswordKEYSkeykey…选项*host–目标库地点*port–目标库端口*key–指定要迁徙的key,如其布置为空字符串””,则示意迁徙KEYS指定后的一切key*destination-db–目标库的数据库*timeout–连目标库的超时刻间,部门毫秒*COPY–不剔除源库中的key,默认剔除*REPLACE–如其目标库中曾经在要迁徙的key,则轮换掉,要不会报错*AUTH–指定目标库的密码*AUTH2–只适用来redis6及之上本子,目标库应用username和password进展证验*KEYS–眼下的key参数设立为空字符串””时有效,后接一切要迁徙的key应用迁徙单个keyMIGRATE192.168.111.1016380keyname05000COPYREPLACE迁徙多个keyMIGRATE192.168.111.1016380″”05000COPYREPLACEKEYSkeyname1keyname2迁徙一切key>量不大,得以应用keys*的情形redis-clikeys\*\|xargsredis-cliMIGRATE192.168.111.1016380″”05000COPYKEYS>量比大的情形redis-cli–scan|xargsredis-cliMIGRATE192.168.111.1016380″”05000COPYKEYS问号不懂得干吗以次下令不起功能MIGRATE192.168.111.1016380″*”05000REPLACE/归来NOKEYMIGRATE192.168.111.1016380″*”05000COPY//归来NOKEYMIGRATE192.168.111.1016380″”05000KEYS*//归来NOKEYMIGRATE192.168.111.1016380″”05000KEYS”*”//归来NOKEY参考,AbstractmigrationframeworkfornodeMigrateAbstractmigrationframeworkfornode.Installation$npminstallmigrateUsageUsage:migrateoptionscommandOptions:-V,–versionoutputtheversionnumber-h,–helpoutputusageinformationCommands:initInitalizethemigrationstoolinaprojectlistListmigrationsandtheirstatuscreateCreateanewmigrationupnameMigrateuptoagivemigrationdownnameMigratedowntoagivenmigrationhelpcmddisplayhelpforcmdForhelpwiththeindividualcommands,see`migratehelpcmd`.Eachcommandhassomehelpfulflagsforcustomisingthebehaviorofthetool.Programmaticusagevarmigrate=require(\migrate\)migrate.load(AdvancedmigrationcreationWhencreatingmigrationsyouhaveabunchofotheroptionstohelpyoucontrolhowthemigrationsarecreated.Youcanfullyconfigurethewaythemigrationismadewitha`generator`,whichisjustafunctionexportedasanodemodule.Agoodexampleofageneratoristhedefaultoneshippedwiththispackage.The`create`commandacceptsaflagforpointingthetoolatagenerator,forexample:$migratecreate–generator./my-migrate-generator.jsAmoresimpleandcommonthingyoumightwantistojustchangethedefaulttemplatefilewhichiscreated.Todothis,youcansimplypassthe`template-file`flag:$migratecreate–template-file./my-migration-template.jsLastly,ifyouwanttousenewerECMAscriptfeatures,orlanguageaddonslikeTypeScript,foryourmigrations,youcanusethe`compiler`flag.Forexample,tousebabelwithyourmigrations,youcandothefollowing:$npminstall–savebabel-register$migratecreate–compiler=”js:babel-register”foo$migrateup–compiler=”js:babel-register”RunningMigrationsWhenfirstrunningthemigrations,allwillbeexecutedinsequence.$migrateup:migrations/1316027432511-add-pets.jsup:migrations/1316027432512-add-jane.jsup:migrations/1316027432575-add-owners.jsup:migrations/1316027433425-coolest-pet.jsmigration:completeSubsequentattemptswillsimplyoutput”complete”,astheyhavealreadybeenexecuted.`migrate`knowsthisbecauseitstoresthecurrentstatein`./.migrate`whichistypicallyafilethatSCMslikeGITshouldignore.$migratemigration:completeIfweweretocreateanothermigrationusing`migratecreate`,andthenexecutemigrationsagain,wewouldexecuteonlythosenotpreviouslyexecuted:$migrateup:migrates/1316027433455-coolest-owner.jsYoucanalsorunmigrationsincrementallybyspecifyingamigration.$migrateup1316027433425-coolest-pet.jsup:migrations/1316027432511-add-pets.jsup:migrations/1316027432512-add-jane.jsup:migrations/1316027432575-add-owners.jsup:migrations/1316027433425-coolest-pet.jsmigration:completeThiswillrunup-migrationsupto(andincluding)`1316027433425-coolest-pet.js`.Similarlyyoucanrundown-migrationsupto(andincluding)aspecificmigration,insteadofmigratingallthewaydown.$migratedown1316027432512-add-jane.jsdown:migrations/1316027432575-add-owners.jsdown:migrations/1316027432512-add-jane.jsmigration:completeAnytimeyouwanttoseethecurrentstateofthemigrations,youcanrun`migratelist`toseeanoutputlike:$migratelist1316027432511-add-pets.js2017-09-23:1316027432512-add-jane.js2017-09-23:Thedescriptioncanbeaddedbyexportinga`description`fieldfromthemigrationfile.CustomStateStorageBydefault,`migrate`storesthestateofthemigrationswhichhavebeenruninafile(`.migrate`).Butyoucanprovideacustomstorageengineifyouwouldliketodosomethingdifferent,likestoringtheminyourdatabaseofchoice.Astorageenginehasasimpleinterfaceof`load(fn)`and`save(set,fn)`.Aslongaswhatgoesinas`set`comesoutthesameon`load`,thenyouaregoodtogo!Ifyouareusingtheprovidedcli,youcanspecifythestoreimplementationwiththe`–store`flag,whichisbea`require`-ablenodemodule.Forexample:$migrateup–store=”my-migration-store”API`migrate.load(opts,cb)`Callsthecallbackwitha`Set`basedontheoptionspassed.Options:*`set`:Asetinstanceifyoucreatedyourown*`stateStore`:Astoreinstancetoloadandstoremigrationstate,orastringwhichisapathtothemigrationstatefile*`migrationsDirectory`:Thepathtothemigrationsdirectory*`filterFunction`:Afilterfunctionwhichwillbecalledforeachfilefoundinthemigrationsdirectory*`sortFunction`:Asortfunctiontoensuremigrationorder`Set.up(migration,cb)`Migratesuptothespecified`migration`or,ifnoneisspecified,tothelatestmigration.Callsthecallback`cb`,possiblywithanerror`err`,whendone.`Set.down(migration,cb)`Migratesdowntothespecified`migration`or,ifnoneisspecified,tothefirstmigration.Callsthecallback`cb`,possiblywithanerror`err`,whendone.Repositoryhttps://github.com/visionmedia/node-migrate,\ufeffid:$00000000ar:mariahcareyti:migrateby:hash:192b92f1c9d75914744bf5644a5a0d5eal:sign:qq:total:257948offset:000:05.98bounce,bounce00:07.33bounce,bounce00:09.04keepitmovin…bounce00:11.06keepitmovin…bounce00:13.82keepitmovin…bounce00:16.33keepitmovin…bounce00:19.44onceagainnothin\00:22.30jumpin\upinyoplace,00:24.01sickofyourberrybuzzin\00:25.46allinmyface,00:26.36waytoomuchtotolerate00:28.92timetoroll00:30.22y\allknowigotstomigrate00:32.48speeddialconnectingmeto00:34.99rae-rae(hey)00:36.14clickinshawntaeand00:37.50mae-mae(hey)00:39.00treatitasaholiday00:40.70causehe\sawrap,00:42.11y\allknowihadtomigrate00:44.22seei\monmywayhome00:46.93causemyjeans,yeahtheyfit00:48.89butitmightbenefit00:49.74metothrowsomethingon00:52.50tofeaturemyhips00:54.21accentuatemy****00:55.71andstealtheshow00:57.16soonaswewalk00:58.52throughthedoor00:59.87fellasbegrabbin\01:01.08atuslikeyo,01:03.04tryin\togetusgoingoff01:04.84thepaton,01:05.94wesippin\grigio…01:08.21slow.01:08.92ifyourneckand01:09.77yourwristcoordinate01:11.93hairbraidedorfadedokay01:14.89wecanmovethisback01:16.19tomyplace,01:17.85it\stimetomigrate01:19.66frommycarinto01:20.91theclubwemigrate01:22.22fromthebartov.i.p.01:24.43wemigrate,01:24.93fromthepartyto01:26.63theafterparty,migrate,01:28.13afterpartytohotel01:29.63migrate01:30.89asweproceedgettingbuzzed01:32.34theenviousones01:33.70hatin\buttheycan\ttake01:35.10theyeyesoffus,01:36.40butwedon\tseenoneofthat01:38.16theyplayin\myjam01:39.01andthefloorispacked01:40.16soya\llneedtomigrateup01:41.56outthedoor01:42.46weclickin\glasses01:43.21complimentsoftheclub01:45.42raisetheystatus01:46.47soyouknowtheyshowuslove01:48.59everywherewego01:50.34theygon\flock01:51.45themboysmigrateto01:52.55whereit\shot.01:54.05(it\shot,it\shot)01:55.66soonaswewalkthrough01:57.01thedoor01:59.02fellasbegrabbin\atuslikeyo02:01.63tryin\togetusgoingoff02:03.44thepatron,02:04.89wesippin\grigio…slow02:06.45ifyou\reinkedup,thuggin\02:08.70that\swhatilike02:10.36facebodyandlamborghinioutside02:13.34obviouslyboyyou\requalified02:15.90otherwise,migrate02:18.00frommycarinto02:19.46theclubwemigrate02:20.91fromthebartov.i.p.wemigrate02:23.72fromthepartytotheafterparty02:26.14migrate02:26.38afterpartytohotel02:28.14migrate02:29.54t-painrap02:30.39thisiswhereitbegins02:31.55andendsattheverysametime02:33.11t-painthemainmanofthehour02:35.53gotaflowthat\llflexyotire02:37.95gotstacksplus02:38.90i\mbackwithmariah.02:39.95(mariahlaughs)02:54.19butigottamigratetobar02:55.65fromthebartotheflo\,02:57.15fromtheflo\tothecar,02:58.91fromthecartothecrib,03:00.31thenbacktotheclub,03:01.72wecanmigrateitallnight03:03.22andminicoupesittinondubs.03:06.23whatchawaitin\on,03:07.38ican\tstandinoneplace03:08.99ineedthatpatronandi,03:10.50hatewhen03:11.30idon\tgetitmyway,03:12.76sodon\twaitformeto03:14.16buydrinks03:14.71oryougon\dehydrate03:15.67it\stimetomigrate03:17.22soonasi\mwalkin\through03:19.43thedoor03:20.69theyknowi\mfromthe8-5-003:23.09ineedthreebottlesof03:25.15thatpatron03:26.45icanmake03:27.21thechevroletgreaseupslow03:28.51ifyour…andyour…03:30.97coordinate03:31.18tellittome03:32.53likeitain\tok03:35.34wecanmovethisbackto03:36.79myplace03:38.09shawtybestbelieve03:38.79it\stimetomigrate03:39.94soonaswewalk03:42.51throughthedoor03:44.13fellasbegrabbin\atuslikeyo03:46.89tryin\togetusgoingoff03:48.40thepatron03:49.65wesippin\grigio…slow03:52.89ifyou\reinkedup,thuggin\03:54.39that\swhatilike,03:55.95facebodyandlamborghinioutside03:57.80obviouslyboyyou\requalified04:00.96otherwise,migrate04:02.82(bye)04:06.13keepitmovin…bounce04:08.09keepitmovin…bounce04:11.20keepitmovin…bounce04:14.11keepitmovin…bounce,**migratory**flights/birds(候鸟)迁移;候鸟牛津词典…**migratory**farmlabour.流的农业劳力柯林斯高阶英语词典NewWorld**migratory**locustsandcommonAmericangrasshoppers.新陆地的移栖的蝗虫和常见的美洲蚱蜢.杂志摘选Thepositiverateof**migratory**birdsishigherthanbirds.候鸟的阳性率极昭著高于留鸟.杂志摘选Most**migratory**farmworkersearnverylittleindeedbycomparisonwithother\workers.多数移民到来的农业工的收益与本地人对待实异常低.杂志摘选Yiyang,thesiteoftheoutbreak,liesnexttoLakeDongting,whichhostsmany**migratory**birds.突发地宜阳接近多候鸟的聚集地道庭湖.杂志摘选Thepartof**migratory**birdsplayinspreadingthevirusisstillbeingstudied.一有些候鸟在传布该种病毒上面的功能现时仍居于钻研阶段.杂志摘选Littleisknownaboutthe**migratory**habitsofthesehugefish.对这些大鱼的洄游性质知之甚少.杂志摘选**Migratory**birdsflylongdistancesbetweenawinterhomeandasummerhome.候鸟要在冬巢和夏巢之间飞很远的相距.杂志摘选Initialstageresistanceagainstaggression,plantofChinesecoastalportionisinwardthegroundis**migratory**.抗战前期,中国沿海有些厂子向腹地迁移.杂志摘选Besides**migratory**birds,whatotheranimalshavethehabitofmigrating?除去候鸟,再有哪种众生有迁居的性质?杂志摘选The**migratory**fisharefour:thereproductivemigrationfeeding**migratory**and**migratory**warming,thewintermigration.鱼的洄游要紧有四种:繁殖洄游、索饵洄游、趋暖洄游、越冬洄游.杂志摘选AnAmerican**migratory**songbirdDolichonyxoryzivorus,themaleofwhichhasblack,white,andyellowishplumage.长刺歌雀美洲鸣鸟,一样候鸟(长刺歌雀).杂志摘选Habits:UncommonSpring**migratory**birdandwintervisitor.生态性质:为春秋普遍过境鸟,与稀有冬候鸟.杂志摘选Darknessswallowedmillionsofplanetsliketidewater.sunflowerswithered,flocksof**migratory**birdsattendingthefuneral.昏黑像潮汐侵吞几百亿个星球.葵花大片枯死.候鸟三五成群地执绋.杂志摘选Theregion,whichhasseverallargelakes,isknowntoliealong**migratory**routes.这地面,有几个巨型湖,坐落候鸟的迁移途径中.杂志摘选Themainprotectionforneckedcranesandother**migratory**birdsandtheirhabitat.要紧掩护冤家为黑颈鹤听候鸟及其栖息条件.杂志摘选Many**migratory**birdsvisitthislakeannually.多候鸟年年到这湖上作短期逗留.《简明英汉词典》Butthebatonthatwhethercantheyfollowagovernmentis**migratory**?但是她们是不是会接着内阁的挥棒迁移呢?杂志摘选A**migratory**birdthatstopsinaparticularplaceforalimitedperiodoftime.侯鸟在一一定的地域稽留一段有限时刻的一样迁移鸟类.杂志摘选Themonarchisoneofthefewbutterflyspeciesthatmakea**migratory**trip.黑脉金蝶是一样很久违的进展迁移的蝶类别.杂志摘选TheAmericanRobin(Turdusmigratorius)a**migratory**songbirdofthethrushfamily.美洲知更鸟(旅鸫)是画眉科迁移鸣鸟.杂志摘选Theluxuriantwaterplantsandgrassontheislandattracthugeflocksof**migratory**birds.岛上行草丰美,招引了大量候鸟.杂志摘选The**migratory**birdisahostofthewetland.候鸟是湿地的物主.杂志摘选Themechanismofinfluenceofthemagneticfluxdensityon**migratory**behaviorwasdiscussed.并对磁场强度反应初晶硅迁移的机制进展了根究.杂志摘选Thepartthat**migratory**birdsplayinspreadingthevirusisstillbeingstudied.迁移鸟在病毒传布中的功能还在钻研进程中.杂志摘选**Migratory**beekeepingisnothingnew.迁移的养蜂人不是初见的.杂志摘选Thiskindof**migratory**birdmigrateswheneverautumncomes.这种旅鸟每到秋令都要进展迁移.杂志摘选Suchstylesreflecta**migratory**trend:Afterworkingabroad,manyherearebackmoneyandmodernity.这种衣裳风骨体现了该地流通性的趋向:从海外打工回去后,多人不光带回了钱,也带回了当代化的气味.杂志摘选,migrate即大框框的迁移immigrate指从其它国移民到该国例如:Birdsmigratefromthesouthtothenortheveryyear.年年鸟儿从南迁移到北.PeopleimmigratefromallovertheworldtoChina.人们从世各国移民来中国.更多答案(3),>在付出和维护一个数据库驱动的使用顺序时,数据库的构造会随代码的变更而变更。

今后,无特殊技术的外移民留居英国的难度将进一步放开,凡未由双亲陪伴抵达英国且试图宣称已博得担保包庇的孩童都将被径直赶走还家。

,”

**在pythonmanger.pymakemigrations以后履行下令:**pythonmanager.pymigrate**就将该修改弹用到数据库文书**如何禁用migrate的功能:**Django<1.9本子时**fromsettingsimport*classDisableMigrations(object):def__contains__(self,item):returnTruedef__getitem__(self,item):returnnotmigrationsMIGRATION_MODULES=DisableMigrations**Django>=1.9本子时**有这样一个布置项目MIGRATION_MODULES。

说白了,行将对数据库的更改,要紧是数据表设计的更改,在数据库中实履行。

和小伴侣领了flyway的卡,咱预期是一天完竣,但是在demo上卡住,因而超时了,用了差一点2天的时刻完竣。

migratefromruraltocity即从乡村迁移到都市。

down中和前端反而。