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Add effective index to subscriptions (#2885)

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alpaca-tc 2017-05-08 02:00:20 +09:00 • committed by Eugen Rochko
parent ca05bfaac7
commit d3704fdb09
2 changed files with 13 additions and 2 deletions
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11
db/migrate/20170507141759_optimize_index_subscriptions.rb Normal file
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class OptimizeIndexSubscriptions < ActiveRecord::Migration[5.0]
def up
add_index :subscriptions, [:account_id, :callback_url], unique: true
remove_index :subscriptions, [:callback_url, :account_id]
end
def down
add_index :subscriptions, [:callback_url, :account_id], unique: true
remove_index :subscriptions, [:account_id, :callback_url]
end
end