| Safe Haskell | Safe-Infered |
|---|
Database.Persist.Query.Internal
- class PersistStore b m => PersistQuery b m where
- update :: PersistEntity val => Key b val -> [Update val] -> b m ()
- updateWhere :: PersistEntity val => [Filter val] -> [Update val] -> b m ()
- deleteWhere :: PersistEntity val => [Filter val] -> b m ()
- selectSource :: (PersistEntity val, PersistEntityBackend val ~ b) => [Filter val] -> [SelectOpt val] -> Source (ResourceT (b m)) (Entity val)
- selectFirst :: (PersistEntity val, PersistEntityBackend val ~ b) => [Filter val] -> [SelectOpt val] -> b m (Maybe (Entity val))
- selectKeys :: PersistEntity val => [Filter val] -> Source (ResourceT (b m)) (Key b val)
- count :: PersistEntity val => [Filter val] -> b m Int
- selectList :: (PersistEntity val, PersistQuery b m, PersistEntityBackend val ~ b) => [Filter val] -> [SelectOpt val] -> b m [Entity 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]
- = forall typ . PersistField typ => Filter {
- data PersistUpdate
- 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 b m, PersistQuery b m) => [Filter a] -> b m ()
Documentation
class PersistStore b m => PersistQuery b m whereSource
Methods
update :: PersistEntity val => Key b val -> [Update val] -> b m ()Source
Update individual fields on a specific record.
updateWhere :: PersistEntity val => [Filter val] -> [Update val] -> b m ()Source
Update individual fields on any record matching the given criterion.
deleteWhere :: PersistEntity val => [Filter val] -> b m ()Source
Delete all records matching the given criterion.
selectSource :: (PersistEntity val, PersistEntityBackend val ~ b) => [Filter val] -> [SelectOpt val] -> Source (ResourceT (b m)) (Entity val)Source
Get all records matching the given criterion in the specified order. Returns also the identifiers.
selectFirst :: (PersistEntity val, PersistEntityBackend val ~ b) => [Filter val] -> [SelectOpt val] -> b m (Maybe (Entity val))Source
get just the first record for the criterion
selectKeys :: PersistEntity val => [Filter val] -> Source (ResourceT (b m)) (Key b val)Source
Get the Keys of all records matching the given criterion.
count :: PersistEntity val => [Filter val] -> b m IntSource
The total number of records fulfilling the given criterion.
Instances
| (MonadThrow m, MonadIO m, MonadUnsafeIO m, MonadBaseControl IO m) => PersistQuery SqlPersist m |
selectList :: (PersistEntity val, PersistQuery b m, PersistEntityBackend val ~ b) => [Filter val] -> [SelectOpt val] -> b m [Entity val]Source
Call select but return the result as a list.
Constructors
| 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])Source
Filters which are available for select, updateWhere and
deleteWhere. Each filter constructor specifies the field being
filtered on, the type of comparison applied (equals, not equals, etc)
and the argument for the comparison.
Constructors
| forall typ . PersistField typ => Filter | |
Fields
| |
| FilterAnd [Filter v] | convenient for internal use, not needed for the API |
| FilterOr [Filter v] | |
data PersistUpdate Source
Constructors
| forall typ . PersistField typ => Update | |
Fields
| |
updateFieldDef :: PersistEntity v => Update v -> FieldDefSource
deleteCascadeWhere :: (DeleteCascade a b m, PersistQuery b m) => [Filter a] -> b m ()Source