27 lines
819 B
Ruby
27 lines
819 B
Ruby
class UpdateUsersCaseInsensitiveEmails < ActiveRecord::Migration
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def up
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execute "DROP INDEX index_users_on_email"
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# Find duplicate emails.
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results = execute <<SQL
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SELECT id, email, count
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FROM (SELECT id, email,
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row_number() OVER(PARTITION BY lower(email) ORDER BY id asc) AS count
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FROM users) dups
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WHERE dups.count > 1
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SQL
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results.each do |row|
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execute "UPDATE users SET email = '#{row['email'].downcase}#{row['count']}' WHERE id = #{row['id']}"
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end
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execute "UPDATE users SET email = lower(email)"
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execute "CREATE UNIQUE INDEX index_users_on_email ON users ((lower(email)));"
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end
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def down
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execute "DROP INDEX index_users_on_email"
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execute "CREATE UNIQUE INDEX index_users_on_email ON users (email);"
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end
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end
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