persistent-2.2: Type-safe, multi-backend data serialization.

Safe HaskellNone
LanguageHaskell98

Database.Persist

Contents

Synopsis

Documentation

module Database.Persist.Class

module Database.Persist.Types

query combinators

(=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Update v infixr 3 Source

assign a field a value

(+=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Update v infixr 3 Source

assign a field by addition (+=)

(-=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Update v infixr 3 Source

assign a field by subtraction (-=)

(*=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Update v infixr 3 Source

assign a field by multiplication (*=)

(/=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Update v infixr 3 Source

assign a field by division (/=)

(==.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Filter v infix 4 Source

(!=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Filter v infix 4 Source

(<.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Filter v infix 4 Source

(>.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Filter v infix 4 Source

(<=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Filter v infix 4 Source

(>=.) :: forall v typ. PersistField typ => EntityField v typ -> typ -> Filter v infix 4 Source

(<-.) :: forall v typ. PersistField typ => EntityField v typ -> [typ] -> Filter v infix 4 Source

In

(/<-.) :: forall v typ. PersistField typ => EntityField v typ -> [typ] -> Filter v infix 4 Source

NotIn

(||.) :: forall v. [Filter v] -> [Filter v] -> [Filter v] infixl 3 Source

the OR of two lists of filters

JSON Utilities

listToJSON :: [PersistValue] -> Text Source

mapToJSON :: [(Text, PersistValue)] -> Text Source

toJsonText :: ToJSON j => j -> Text Source

getPersistMap :: PersistValue -> Either Text [(Text, PersistValue)] Source

Other utililities

limitOffsetOrder :: PersistEntity val => [SelectOpt val] -> (Int, Int, [SelectOpt val]) Source