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| val countPersons: ConnectionIO[Int] = | |
| sql"SELECT COUNT(*) FROM persons".query[Int].unique | |
| val callFromCount: ConnectionIO[IO[Unit]] = countPersons.map { count => | |
| if (count == 0) IO(println("No users!")) else IO(println(s"Found $count users")) | |
| } | |
| val showResults: IO[Unit] = callFromCount.transact(transactor).flatten | |
| showResults.unsafeRunSync() |
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