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  1. get :: forall record (m :: Type -> Type) . (PersistStoreRead backend, MonadIO m, PersistRecordBackend record backend) => Key record -> ReaderT backend m (Maybe record)

    persistent Database.Persist.Class

    Get a record by identifier, if available.

    Example usage

    With schema-1 and dataset-1, 
    getSpj :: MonadIO m => ReaderT SqlBackend m (Maybe User)
getSpj = get spjId

    mspj <- getSpj
    The above query when applied on dataset-1, will get this: 
    +------+-----+
| name | age |
+------+-----+
| SPJ  |  40 |
+------+-----+

  2. get :: forall record (m :: Type -> Type) . (PersistStoreRead backend, MonadIO m, PersistRecordBackend record backend) => Key record -> ReaderT backend m (Maybe record)

    persistent Database.Persist.Class.PersistStore

    Get a record by identifier, if available.

    Example usage

    With schema-1 and dataset-1, 
    getSpj :: MonadIO m => ReaderT SqlBackend m (Maybe User)
getSpj = get spjId

    mspj <- getSpj
    The above query when applied on dataset-1, will get this: 
    +------+-----+
| name | age |
+------+-----+
| SPJ  |  40 |
+------+-----+

  3. get :: (PersistRecordBackend record SqlBackend, Typeable record, MonadSqlQuery m) => Key record -> m (Maybe record)

    persistent-mtl Database.Persist.Monad.Shim

    The lifted version of get

  4. get :: (PersistRecordBackend record SqlBackend, Typeable record, MonadSqlQuery m) => Key record -> m (Maybe record)

    persistent-mtl Database.Persist.Sql.Shim

    The lifted version of get

  5. get :: forall record (m :: Type -> Type) . (PersistStoreRead backend, MonadIO m, PersistRecordBackend record backend) => Key record -> ReaderT backend m (Maybe record)

    persistent-redis Database.Persist.Redis

    Get a record by identifier, if available.

    Example usage

    With schema-1 and dataset-1, 
    getSpj :: MonadIO m => ReaderT SqlBackend m (Maybe User)
getSpj = get spjId

    mspj <- getSpj
    The above query when applied on dataset-1, will get this: 
    +------+-----+
| name | age |
+------+-----+
| SPJ  |  40 |
+------+-----+

  6. Get :: forall record . PersistRecordBackend record SqlBackend => Key record -> SqlQueryRep record (Maybe record)

    persistent-mtl Database.Persist.Monad.SqlQueryRep

    Constructor corresponding to get

  7. Get :: forall record . PersistRecordBackend record SqlBackend => Key record -> SqlQueryRep record (Maybe record)

    persistent-mtl Database.Persist.Monad.TestUtils

    Constructor corresponding to get

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

    persistent Database.Persist

    FIXME Add documentation to that.

  9. getBy :: forall record (m :: Type -> Type) . (PersistUniqueRead backend, MonadIO m, PersistRecordBackend record backend) => Unique record -> ReaderT backend m (Maybe (Entity record))

    persistent Database.Persist.Class

    Get a record by unique key, if available. Returns also the identifier.

    Example usage

    With schema-1 and dataset-1: 
    getBySpjName :: MonadIO m  => ReaderT SqlBackend m (Maybe (Entity User))
getBySpjName = getBy $ UniqueUserName "SPJ"

    mSpjEnt <- getBySpjName
    The above query when applied on dataset-1, will get this entity: 
    +----+------+-----+
| id | name | age |
+----+------+-----+
|  1 | SPJ  |  40 |
+----+------+-----+

  10. getByValue :: forall record (m :: Type -> Type) backend . (MonadIO m, PersistUniqueRead backend, PersistRecordBackend record backend, AtLeastOneUniqueKey record) => record -> ReaderT backend m (Maybe (Entity record))

    persistent Database.Persist.Class

    A modification of getBy, which takes the PersistEntity itself instead of a Unique record. Returns a record matching one of the unique keys. This function makes the most sense on entities with a single Unique constructor.

    Example usage

    With schema-1 and dataset-1, getBySpjValue :: MonadIO m => ReaderT SqlBackend m (Maybe (Entity User)) getBySpjValue = getByValue $ User SPJ 999 
    mSpjEnt <- getBySpjValue
    The above query when applied on dataset-1, will get this record: 
    +----+------+-----+
| id | name | age |
+----+------+-----+
|  1 | SPJ  |  40 |
+----+------+-----+

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