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Within LTS Haskell 24.38 (ghc-9.10.3)

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  1. unpackspecMaybeFields :: Unpackspec a b -> Unpackspec (MaybeFields a) (MaybeFields b)

    opaleye Opaleye.Internal.MaybeFields

    No documentation available.

  2. valuesspecMaybeFields :: Valuesspec a b -> Valuesspec (MaybeFields a) (MaybeFields b)

    opaleye Opaleye.Internal.MaybeFields

    No documentation available.

  3. binaryspecMaybeFields :: WithNulls Binaryspec a b -> Binaryspec (MaybeFields a) (MaybeFields b)

    opaleye Opaleye.MaybeFields

    No documentation available.

  4. catMaybeFields :: SelectArr i (MaybeFields a) -> SelectArr i a

    opaleye Opaleye.MaybeFields

    The Opaleye analogue of catMaybes. Most commonly you will want to use this at type 

    catMaybeFields :: Select (MaybeFields a) -> Select a

  5. distinctspecMaybeFields :: WithNulls Distinctspec a b -> Distinctspec (MaybeFields a) (MaybeFields b)

    opaleye Opaleye.MaybeFields

    No documentation available.

  6. fromFieldsMaybeFields :: FromFields fields haskells -> FromFields (MaybeFields fields) (Maybe haskells)

    opaleye Opaleye.MaybeFields

    No documentation available.

  7. fromMaybeFields :: Default IfPP b b => b -> MaybeFields b -> b

    opaleye Opaleye.MaybeFields

    The Opaleye analogue of fromMaybe

  8. fromMaybeFieldsExplicit :: IfPP b b -> b -> MaybeFields b -> b

    opaleye Opaleye.MaybeFields

    No documentation available.

  9. matchMaybe :: Default IfPP b b => MaybeFields a -> (Maybe a -> b) -> b

    opaleye Opaleye.MaybeFields

    Use a Haskell \case expression to pattern match on a MaybeFields. 

    example :: MaybeFields (Field SqlInt4) -> Field SqlInt4
example mf = matchMaybe mf $ \case
Nothing -> 0
Just x  -> x * 100

  10. nullableToMaybeFields :: FieldNullable a -> MaybeFields (Field a)

    opaleye Opaleye.MaybeFields

    Convert NULL to nothingFields and non-NULL to a justFields

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