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...you don't have an ActiveRecord class in your scope, you can always use ActiveRecord::Base.transaction do...

By using a transaction we have grouped together the creation of the...

...a single database row, you should always use a transaction. Note that in Rails, ActiveRecord::Base#save automatically opens a transaction. Hence changes you make in callbacks, nested attributes processing...

...on database statements by default, the following query will run for an entire day: ActiveRecord::Base.connection.execute("SELECT pg_sleep(86400)") The good news is that with statement_timeout for PostgreSQL...

...adapter: postgresql # ... variables: statement_timeout: 10s # or ms, min, etc Test that it works: ActiveRecord::Base.connection.execute("show statement_timeout;").map { |row| row } => [{"statement_timeout"=>"10s"}] begin ActiveRecord::Base.connection.execute("SELECT pg...