Safe Haskell | None |
---|---|
Language | Haskell2010 |
Documentation
toFields :: Default Constant haskells fields => haskells -> fields Source #
toFields
provides a convenient typeclass wrapper around the
Column
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
Constant
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
Constant
for your custom types.
newtype Constant haskells fields Source #
Constant | |
|