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[ruby/sinatra-sequel] Don't case statement for batch update #9699

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[ruby/sinatra-sequel] Don't case statement for batch update #9699

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11 changes: 4 additions & 7 deletions frameworks/Ruby/sinatra-sequel/boot.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -63,13 +63,10 @@ def self.batch_update(worlds)
if DB.database_type == :mysql
worlds.map(&:save_changes)
else
ids = []
sql = String.new("UPDATE world SET randomnumber = CASE id ")
worlds.each do |world|
sql << "when #{world.id} then #{world.randomnumber} "
ids << world.id
end
sql << "ELSE randomnumber END WHERE id IN ( #{ids.join(',')})"
sql_values = worlds.map { "(#{_1.id}, #{_1.randomnumber})" }.join(', ')
sql = "UPDATE world SET randomnumber = updated.randomnumber "
sql << " FROM (VALUES #{ sql_values }) AS updated (id, randomnumber)"
sql << "WHERE id = updated.id"
DB.run(sql)
end
end
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