Safe Haskell	Safe-Inferred
Language	Haskell2010

Prairie.Update

Description

This cl

Since: 0.0.1.0

Synopsis

Documentation

data Update rec where Source #

An operation representing an update against the rec in question.

This type is partially an example - you may want to have a more sophisticated update type than merely setting fields.

Since: 0.0.1.0

Constructors

SetField :: Field rec a -> a -> Update rec

Instances details

(FieldDict FromJSON rec, FieldDict (Typeable :: Type -> Constraint) rec, FromJSON (SomeField rec)) => FromJSON (Update rec) Source #	Parses an `Update` with the following format: { "field": field, "value": newValue } Since: 0.0.1.0
Instance details Defined in Prairie.Update Methods parseJSON :: Value -> Parser (Update rec) # parseJSONList :: Value -> Parser [Update rec] # omittedField :: Maybe (Update rec) #
(FieldDict ToJSON rec, forall a. ToJSON (Field rec a)) => ToJSON (Update rec) Source #	Renders an `Update` in the following format: { "field": `toJSON` field, "value": `toJSON` newValue } Since: 0.0.1.0
Instance details Defined in Prairie.Update Methods toJSON :: Update rec -> Value # toEncoding :: Update rec -> Encoding # toJSONList :: [Update rec] -> Value # toEncodingList :: [Update rec] -> Encoding # omitField :: Update rec -> Bool #
(forall a. Show (Field rec a), FieldDict Show rec) => Show (Update rec) Source #	Since: 0.0.1.0
Instance details Defined in Prairie.Update Methods showsPrec :: Int -> Update rec -> ShowS # show :: Update rec -> String # showList :: [Update rec] -> ShowS #
(forall a. Eq (Field rec a), FieldDict (Typeable :: Type -> Constraint) rec, FieldDict Eq rec) => Eq (Update rec) Source #	Since: 0.0.1.0
Instance details Defined in Prairie.Update Methods (==) :: Update rec -> Update rec -> Bool # (/=) :: Update rec -> Update rec -> Bool #

Run an Update against the record it is for.

>>> let user = User { name = "Bob", age = 30 }
>>> updateSingleField (SetField UserName Alice) user
User { name = "Alice", age = 30 }

Since: 0.0.1.0

updateRecord :: Record rec => [Update rec] -> rec -> rec Source #

Perform an list of updates against the Record.

Since: 0.0.1.0