| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Opaleye.Constant
Description
Do not use. Use Opaleye.ToFields instead. Will be deprecated in version 0.7.
Documentation
toFields :: Default ToFields haskells fields => haskells -> fields Source #
toFields provides a convenient typeclass wrapper around the
Field_ creation functions in Opaleye.SqlTypes. Besides
convenience it doesn't provide any additional functionality.
It can be used with functions like runInsert
to insert custom Haskell types into the database.
The following is an example of a function for inserting custom types.
customInsert
:: ( Default ToFields haskells fields )
=> Connection
-> Table fields fields'
-> haskells
-> IO Int64
customInsert conn table haskells = runInsert conn table $ toFields haskells
In order to use this function with your custom types, you need to define an
instance of Default ToFields for your custom types.
constant :: Default ToFields haskells fields => haskells -> fields Source #
Do not use. Use toFields instead. Will be deprecated in version 0.7.
newtype Constant haskells fields Source #
Do not use the name Constant. Use ToFields instead. Will be
deprecated in version 0.7.
Constructors
| Constant | |
Fields
| |