fixed 修改user login唯一索引
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class AddForgeAppliedMessageUtf8mb4 < ActiveRecord::Migration[5.2]
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class AddUserLoginUniqIndex < ActiveRecord::Migration[5.2]
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def change
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def change
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users = User.group("login").having("count(1) >1")
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users = User.group("login").having("count(1) >1")
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