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Within LTS Haskell 24.3 (ghc-9.10.2)
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fromSqlKey :: ToBackendKey SqlBackend record => Key record -> Int64esqueleto Database.Esqueleto No documentation available.
fromBackendKey :: ToBackendKey backend record => BackendKey backend -> Key recordesqueleto Database.Esqueleto.Experimental No documentation available.
fromBaseId :: ToBaseId ent => SqlExpr (Value (Key (BaseEnt ent))) -> SqlExpr (Value (Key ent))esqueleto Database.Esqueleto.Experimental The inverse of toBaseId. Note that this is somewhat less "safe" than toBaseId. Calling toBaseId will usually mean that a foreign key constraint is present that guarantees the presence of the base ID. fromBaseId has no such guarantee. Consider the code example given in toBaseId:
Bar barNum Int Foo bar BarId fooNum Int Primary bar
instance ToBaseId Foo where type BaseEnt Foo = Bar toBaseIdWitness barId = FooKey barId
The type of toBaseId for Foo would be:toBaseId :: SqlExpr (Value FooId) -> SqlExpr (Value BarId)
The foreign key constraint on Foo means that every FooId points to a BarId in the database. However, fromBaseId will not have this:fromBaseId :: SqlExpr (Value BarId) -> SqlExpr (Value FooId)
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esqueleto Database.Esqueleto.Experimental As fromBaseId, but works on Maybe keys.
fromPersistValue :: PersistField a => PersistValue -> Either Text aesqueleto Database.Esqueleto.Experimental No documentation available.
fromPersistValueJSON :: FromJSON a => PersistValue -> Either Text aesqueleto Database.Esqueleto.Experimental Convenience function for getting a free PersistField instance from a type with JSON instances. The JSON parser used will accept JSON values other that object and arrays. So, if your instance serializes the data to a JSON string, this will still work. Example usage in combination with toPersistValueJSON:
instance PersistField MyData where fromPersistValue = fromPersistValueJSON toPersistValue = toPersistValueJSON
fromPersistValueText :: PersistValue -> Either Text Textesqueleto Database.Esqueleto.Experimental No documentation available.
fromPersistValues :: PersistEntity record => [PersistValue] -> Either Text recordesqueleto Database.Esqueleto.Experimental A lower-level operation to convert from database values to a Haskell record.
fromSqlKey :: ToBackendKey SqlBackend record => Key record -> Int64esqueleto Database.Esqueleto.Experimental No documentation available.
fromJoin :: Builder -> RawFn -> RawFn -> Maybe (SqlExpr (Value Bool)) -> RawFnesqueleto Database.Esqueleto.Experimental.From.Join No documentation available.