7 lines
278 B
Ruby
7 lines
278 B
Ruby
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class AddUniqueIndexToGroupRequests < ActiveRecord::Migration[5.2]
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def change
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execute "DELETE FROM group_requests WHERE id NOT IN (SELECT MIN(id) FROM group_requests GROUP BY group_id, user_id)"
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add_index :group_requests, [:group_id, :user_id], unique: true
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end
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end
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