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1. module Database.Esqueleto.Experimental.ToMaybe

   No documentation available.

2. class ToMaybe a

   esqueleto	Database.Esqueleto.Experimental.ToMaybe

   No documentation available.

3. type family ToMaybeT a

   esqueleto	Database.Esqueleto.Experimental.ToMaybe

   No documentation available.

4. toMaybe :: ToMaybe a => a -> ToMaybeT a

   esqueleto	Database.Esqueleto.Experimental.ToMaybe

   No documentation available.

5. entityAsValueMaybe :: SqlExpr (Maybe (Entity val)) -> SqlExpr (Value (Maybe (Entity val)))

   esqueleto	Database.Esqueleto.Internal.Internal

   No documentation available.

6. fromBaseIdMaybe :: ToBaseId ent => SqlExpr (Value (Maybe (Key (BaseEnt ent)))) -> SqlExpr (Value (Maybe (Key ent)))

   esqueleto	Database.Esqueleto.Internal.Internal

   As fromBaseId, but works on Maybe keys.

7. fromStartMaybe :: (PersistEntity a, BackendCompatible SqlBackend (PersistEntityBackend a)) => SqlQuery (PreprocessedFrom (SqlExpr (Maybe (Entity a))))

   esqueleto	Database.Esqueleto.Internal.Internal

   (Internal) Same as fromStart, but entity may be missing.

8. subSelectMaybe :: PersistField a => SqlQuery (SqlExpr (Value (Maybe a))) -> SqlExpr (Value (Maybe a))

   esqueleto	Database.Esqueleto.Internal.Internal

   Execute a subquery SELECT in a SqlExpr. This function is a shorthand for the common joinV . subSelect idiom, where you are calling subSelect on an expression that would be Maybe already. As an example, you would use this function when calling sum_ or max_, which have Maybe in the result type (for a 0 row query).

9. toBaseIdMaybe :: ToBaseId ent => SqlExpr (Value (Maybe (Key ent))) -> SqlExpr (Value (Maybe (Key (BaseEnt ent))))

   esqueleto	Database.Esqueleto.Internal.Internal

   Like toBaseId, but works on Maybe keys.

10. ByMaybeAttr :: WhyNullable

    esqueleto	Database.Esqueleto.Legacy

    No documentation available.

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