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[Rails] rollback migration version

遇到 migration 進退兩難

在 localhost 或者 staging 已经部属完 migration
而當前处在错误的版本，爾後又继续建立 migrate file，中間存在很多的 migration versions
导致最後沒辦法前進 rake db:migrate ，也沒辦法後退 rollback:migrate

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PostgreSQL apache2 api array async auto aws beautify-ruby benchmark bloomfilter bot branch bucket bug build build_stubbed centos chrome class collection command commit compass cookie count css databases db domain enum error es5 es6 eth exists extend factorybot factorygirl feeling figaro fixed font-size git godaddy hangzhou heroku hexo index install instance ios javascript jquery json lazy-loading learn lendbot lending length linode linux load-more logdown mariadb material-design meetup member migration modal mysql mysql@5.7 notify package-install pakogi performance poloniex pq preventDefault problm psql rails rake redis remote resource rollback routes rspec rss ruby ruby-on-rails s3 sass sass-convert screen scroll scss seo session setting share shell-script size spec speed stash stopPropagation string sublime symbol telegram test ubuntu url utf utf8mb4 version visual-studio wallet wget wordpress wpf xml youtube

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