ActiveRecord::PendingMigrationError

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錯誤:執行安裝devide gem時畫面出錯

原因:尚不知
解法:尝试运行图中run后面的那条指令,失败,就分别运行rake db:drop rake db:createrake rake db:migrate,然后重启server 一樣失敗
注销掉gemfile里的两个spring gem 并再执行一遍rake“三兄弟 然后重启server 成功解決

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