Created
May 11, 2020 14:52
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Ruby on Rails: database changes logger
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| # frozen_string_literal: true | |
| ### Usage | |
| # Helps to understand how operation run affects the database state | |
| # DatabaseChangesLogger.call(filename: 'output') { Operation.perform } | |
| module DatabaseChangesLogger | |
| EVENTS_TYPE = 'sql.active_record' | |
| OPERATION_REGEX = /Update|Create/.freeze | |
| def self.call(filename: nil) | |
| return unless filename | |
| ActiveSupport::Notifications.subscribed(log_to(filename), EVENTS_TYPE) do | |
| yield | |
| end | |
| end | |
| def self.log_to(filename) | |
| lambda { |*args| | |
| event = ActiveSupport::Notifications::Event.new(*args) | |
| if event.payload[:name]&.match?(OPERATION_REGEX) | |
| filename = Rails.root.join(filename) | |
| File.open(Rails.root.join(filename), mode: 'a') do |f| | |
| f.write "\n" | |
| f.write(event.payload[:name]) | |
| f.write "\n" | |
| f.write(event.payload[:sql]) | |
| f.write "\n" | |
| f.write("=============================") | |
| f.write "\n" | |
| end | |
| end | |
| } | |
| end | |
| end |
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