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Exact lookup

1. (>.>) :: (a -> b) -> (b -> c) -> a -> c

   ghc	GHC.Data.TrieMap

   No documentation available.

2. (<.>) :: HsWrapper -> HsWrapper -> HsWrapper

   ghc	GHC.Tc.Types.Evidence

   No documentation available.

3. (!=.) :: forall v typ . PersistField typ => EntityField v typ -> typ -> Filter v

   persistent	Database.Persist

   Non-equality check.

   Examples

   selectSimon :: MonadIO m => ReaderT SqlBackend m [Entity User]
   selectSimon = selectList [UserName !=. "SPJ" ] []
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+-----+
   |id   |name |age  |
   +-----+-----+-----+
   |2    |Simon|41   |
   +-----+-----+-----+
   

4. (*=.) :: forall v typ . PersistField typ => EntityField v typ -> typ -> Update v

   persistent	Database.Persist

   Assign a field by multiplication (*=).

   Examples

   multiplyAge :: MonadIO m => ReaderT SqlBackend m ()
   multiplyAge = updateWhere [UserName ==. "SPJ" ] [UserAge *=. 2]
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+--------+
   |id   |name |age     |
   +-----+-----+--------+
   |1    |SPJ  |40 -> 80|
   +-----+-----+--------+
   |2    |Simon|41      |
   +-----+-----+--------+
   

5. (+=.) :: forall v typ . PersistField typ => EntityField v typ -> typ -> Update v

   persistent	Database.Persist

   Assign a field by addition (+=).

   Examples

   addAge :: MonadIO m => ReaderT SqlBackend m ()
   addAge = updateWhere [UserName ==. "SPJ" ] [UserAge +=. 1]
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+---------+
   |id   |name |age      |
   +-----+-----+---------+
   |1    |SPJ  |40 -> 41 |
   +-----+-----+---------+
   |2    |Simon|41       |
   +-----+-----+---------+
   

6. (-=.) :: forall v typ . PersistField typ => EntityField v typ -> typ -> Update v

   persistent	Database.Persist

   Assign a field by subtraction (-=).

   Examples

   subtractAge :: MonadIO m => ReaderT SqlBackend m ()
   subtractAge = updateWhere [UserName ==. "SPJ" ] [UserAge -=. 1]
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+---------+
   |id   |name |age      |
   +-----+-----+---------+
   |1    |SPJ  |40 -> 39 |
   +-----+-----+---------+
   |2    |Simon|41       |
   +-----+-----+---------+
   

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

   persistent	Database.Persist

   Check if value is not in given list.

   Examples

   selectSimon :: MonadIO m => ReaderT SqlBackend m [Entity User]
   selectSimon = selectList [UserAge /<-. [40]] []
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+-----+
   |id   |name |age  |
   +-----+-----+-----+
   |2    |Simon|41   |
   +-----+-----+-----+
   

8. (/=.) :: forall v typ . PersistField typ => EntityField v typ -> typ -> Update v

   persistent	Database.Persist

   Assign a field by division (/=).

   Examples

   divideAge :: MonadIO m => ReaderT SqlBackend m ()
   divideAge = updateWhere [UserName ==. "SPJ" ] [UserAge /=. 2]
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+---------+
   |id   |name |age      |
   +-----+-----+---------+
   |1    |SPJ  |40 -> 20 |
   +-----+-----+---------+
   |2    |Simon|41       |
   +-----+-----+---------+
   

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

   persistent	Database.Persist

   Check if value is in given list.

   Examples

   selectUsers :: MonadIO m => ReaderT SqlBackend m [Entity User]
   selectUsers = selectList [UserAge <-. [40, 41]] []
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+-----+
   |id   |name |age  |
   +-----+-----+-----+
   |1    |SPJ  |40   |
   +-----+-----+-----+
   |2    |Simon|41   |
   +-----+-----+-----+
   

   selectSPJ :: MonadIO m => ReaderT SqlBackend m [Entity User]
   selectSPJ = selectList [UserAge <-. [40]] []
   

   The above query when applied on dataset-1, will produce this:

   +-----+-----+-----+
   |id   |name |age  |
   +-----+-----+-----+
   |1    |SPJ  |40   |
   +-----+-----+-----+
   

10. (<.) :: forall v typ . PersistField typ => EntityField v typ -> typ -> Filter v

    persistent	Database.Persist

    Less-than check.

    Examples

    selectLessAge :: MonadIO m => ReaderT SqlBackend m [Entity User]
    selectLessAge = selectList [UserAge <. 41 ] []
    

    The above query when applied on dataset-1, will produce this:

    +-----+-----+-----+
    |id   |name |age  |
    +-----+-----+-----+
    |1    |SPJ  |40   |
    +-----+-----+-----+
    

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