generated from tpl/purs
42 lines
1.1 KiB
Markdown
42 lines
1.1 KiB
Markdown
# purescript-postgresql-client
|
||
|
||
purescript-postgresql-client is a PostgreSQL client library for PureScript.
|
||
Included is a preprocessor, purspgpp, which finds embedded SQL queries in
|
||
PureScript source files and infers their types. Such queries can be written as
|
||
follows:
|
||
|
||
```purescript
|
||
userName = [query|
|
||
SELECT first_name, last_name
|
||
FROM users
|
||
WHERE id = $1
|
||
|]
|
||
```
|
||
|
||
purspgpp will replace this by something like the following:
|
||
|
||
```purescript
|
||
(Query """
|
||
SELECT first_name, last_name
|
||
FROM users
|
||
WHERE id = $1
|
||
""" :: Query (UUID × Unit) (String × String × Unit))
|
||
```
|
||
|
||
You can integrate purspgpp into your build system. For example, here is a
|
||
PowerShell script that executes it for all `.purspg` files:
|
||
|
||
```powershell
|
||
Get-ChildItem src -Recurse -Filter *.purspg `
|
||
| ForEach-Object {
|
||
perl6 `
|
||
bower_components/purescript-postgresql-client/purspgpp `
|
||
"user=postgres password=lol123 dbname=nn" `
|
||
"$($_.FullName)" `
|
||
"$([IO.Path]::ChangeExtension($_.FullName, "purs"))"
|
||
if (!$?) {
|
||
Write-Error "Unable to preprocess $_"
|
||
}
|
||
}
|
||
```
|