thunderstrike/purescript-postgresql-client
thunderstrike/purescript-postgresql-client
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Tomasz Rybarczyk 2018-12-06 20:30:38 +01:00
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AUTHORS Normal file
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@ -0,0 +1,4 @@
akheron
Kamirus
paluh
rightfold

16
README.md
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@ -27,12 +27,18 @@ import Effect.Class (liftEffect)
import Test.Assert (assert) import Test.Assert (assert)
``` ```
The whole API for interaction with postgres is performed asynchronously in `Aff`. To be honest The whole API for interaction with PostgreSQL is performed asynchronously in `Aff`
it is `type PG a = ExceptT PGError Aff a` so you can easily catch database related errors in (the only function which runs in plain `Effect` is `newPool`). To be honest we
a sane (read typed) manner. The only function which is done in plain `Effect` is `newPool`. are wrapping `Aff` in `ExceptT` so you can easily handle database related errors
in a sane manner:
Don't be scarred you can turn `PG a` into `Aff (Either PGError a)` just running single function ```purescript
`runExceptT`. type PG a = ExceptT PGError Aff a
```
Don't be scarred by this `PG` type alias. It just wraps every db result in `Either`.
You can turn `PG a` into the `Aff (Either PGError a)` by just running a single
function - `runExceptT`.
We assume here that postgres is running on a standard local port We assume here that postgres is running on a standard local port
with `ident` authentication so configuration can be nearly empty (`defaultPoolConfiguration`). with `ident` authentication so configuration can be nearly empty (`defaultPoolConfiguration`).