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Within LTS Haskell 24.6 (ghc-9.10.2)

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  1. maybeToNullable :: Maybe (Field a) -> FieldNullable a

    opaleye Opaleye.Field

    If the argument is Nothing return NULL otherwise return the provided value coerced to a nullable type.

  2. maybeFields :: Default IfPP b b => b -> (a -> b) -> MaybeFields a -> b

    opaleye Opaleye.Internal.MaybeFields

    The Opaleye analogue of maybe

  3. maybeFieldsExplicit :: IfPP b b' -> b -> (a -> b) -> MaybeFields a -> b'

    opaleye Opaleye.Internal.MaybeFields

    No documentation available.

  4. maybeFieldsToNullable :: MaybeFields (Field a) -> FieldNullable a

    opaleye Opaleye.Internal.MaybeFields

    Convert nothingFields to NULL to a justFields to non-NULL

  5. maybeFieldsToSelect :: SelectArr (MaybeFields a) a

    opaleye Opaleye.Internal.MaybeFields

    The Opaleye analogue of maybeToList. Unless you are using arrow notation you'll probably find catMaybeFields easier to use.

  6. maybeFields :: Default IfPP b b => b -> (a -> b) -> MaybeFields a -> b

    opaleye Opaleye.MaybeFields

    The Opaleye analogue of maybe

  7. maybeFieldsExplicit :: IfPP b b' -> b -> (a -> b) -> MaybeFields a -> b'

    opaleye Opaleye.MaybeFields

    No documentation available.

  8. maybeFieldsToNullable :: MaybeFields (Field a) -> FieldNullable a

    opaleye Opaleye.MaybeFields

    Convert nothingFields to NULL to a justFields to non-NULL

  9. maybeFieldsToSelect :: SelectArr (MaybeFields a) a

    opaleye Opaleye.MaybeFields

    The Opaleye analogue of maybeToList. Unless you are using arrow notation you'll probably find catMaybeFields easier to use.

  10. maybeReader :: (String -> Maybe a) -> Reader a

    opt-env-conf OptEnvConf

    Turn a Maybe parsing function into a Reader

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