src/Rel8/Table/Insert.hs · rel8

on 188bdd0 help sign in

rel8/src/Rel8/Table/Insert.hs

39 lines 1.2 kB history raw

1{-# language FlexibleContexts #-}

2{-# language NamedFieldPuns #-}

3{-# language TypeFamilies #-}

4{-# language ViewPatterns #-}

6module Rel8.Table.Insert

7 ( toInsert

8 , toInsertDefaults

9 )

10where

12-- base

13import Prelude

15-- rel8

16import Rel8.Kind.Necessity ( SNecessity( SOptional, SRequired ) )

17import Rel8.Schema.Context ( Col'(..) )

18import Rel8.Schema.HTable ( hfield, htabulate, hspecs )

19import Rel8.Schema.Spec ( SSpec(..) )

20import Rel8.Table ( fromColumns, toColumns )

21import Rel8.Table.Recontextualize ( Inserts )

24toInsert :: Inserts exprs inserts => exprs -> inserts

25toInsert (toColumns -> exprs) = fromColumns $ htabulate $ \field ->

26 case hfield hspecs field of

27 SSpec {necessity} -> case hfield exprs field of

28 DB expr -> case necessity of

29 SRequired -> RequiredInsert expr

30 SOptional -> OptionalInsert (Just expr)

33toInsertDefaults :: Inserts exprs inserts => exprs -> inserts

34toInsertDefaults (toColumns -> exprs) = fromColumns $ htabulate $ \field ->

35 case hfield hspecs field of

36 SSpec {necessity} -> case hfield exprs field of

37 DB expr -> case necessity of

38 SRequired -> RequiredInsert expr

39 SOptional -> OptionalInsert Nothing