Database.Persist.Query.Internal

Contents

• Exceptions

Synopsis

• class PersistStore backend m => PersistQuery backend m where
  • update :: PersistEntity val => Key backend val -> [Update val] -> backend m ()
  • updateGet :: PersistEntity val => Key backend val -> [Update val] -> backend m val
  • updateWhere :: PersistEntity val => [Filter val] -> [Update val] -> backend m ()
  • deleteWhere :: PersistEntity val => [Filter val] -> backend m ()
  • selectSource :: (PersistEntity val, PersistEntityBackend val ~ backend) => [Filter val] -> [SelectOpt val] -> Source (ResourceT (backend m)) (Entity val)
  • selectFirst :: (PersistEntity val, PersistEntityBackend val ~ backend) => [Filter val] -> [SelectOpt val] -> backend m (Maybe (Entity val))
  • selectKeys :: PersistEntity val => [Filter val] -> [SelectOpt val] -> Source (ResourceT (backend m)) (Key backend val)
  • count :: PersistEntity val => [Filter val] -> backend m Int
• selectList :: (PersistEntity val, PersistQuery backend m, PersistEntityBackend val ~ backend) => [Filter val] -> [SelectOpt val] -> backend m [Entity val]
• selectKeysList :: (PersistEntity val, PersistQuery b m, PersistEntityBackend val ~ b) => [Filter val] -> [SelectOpt val] -> b m [Key b val]
• data SelectOpt v
  • = forall typ . Asc (EntityField v typ)
  • | forall typ . Desc (EntityField v typ)
  • | OffsetBy Int
  • | LimitTo Int
• limitOffsetOrder :: PersistEntity val => [SelectOpt val] -> (Int, Int, [SelectOpt val])
• data Filter v
  • = forall typ . PersistField typ => Filter {
    • filterField :: EntityField v typ
    • filterValue :: Either typ [typ]
    • filterFilter :: PersistFilter
    }
  • | FilterAnd [Filter v]
  • | FilterOr [Filter v]
• data PersistUpdate
  • = Assign
  • | Add
  • | Subtract
  • | Multiply
  • | Divide
• data Update v = forall typ . PersistField typ => Update {
  • updateField :: EntityField v typ
  • updateValue :: typ
  • updateUpdate :: PersistUpdate
  }
• updateFieldDef :: PersistEntity v => Update v -> FieldDef
• deleteCascadeWhere :: (DeleteCascade a backend m, PersistQuery backend m) => [Filter a] -> backend m ()
• data UpdateGetException = KeyNotFound String

Documentation

Exceptions