Petri Lehtinen 10a868b166 Implement monadic error handling, get rid of JavaScript exceptions ... - Add `PGError` type to model different errors that can happen when querying PostgreSQL. The mapping from SQLSTATE to error was inspired by `psycopg2`. - Run all actions in a new `PG` monad, which is just `Aff` stacked with `ExceptT PGError` to provide monadic error handling. Any errors caused by database access are not thrown as JavaScript exceptions anymore. - While at it, remove some duplication between `query` and `command` by reusing `ffiUnsafeQuery` in both cases.		2018-11-16 13:40:30 +02:00
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Main.purs	Implement monadic error handling, get rid of JavaScript exceptions	2018-11-16 13:40:30 +02:00