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