Safe Haskell	None
Language	Haskell2010

Database.Selda.JSON

Contents

Synopsis

class JSONBackend b where
- (~>) :: JSONValue a => Col b a -> Col b Text -> Col b (Maybe Value)
- jsonToText :: Col b Value -> Col b Text

Documentation

Any backend that supports JSON lookups in queries.

Methods

(~>) :: JSONValue a => Col b a -> Col b Text -> Col b (Maybe Value) infixl 8 Source #

Look up the given key in the given JSON column.

Convert the given JSON column to plain text.

Instances

JSONBackend b => JSONBackend (Inner b) Source #
Instance details Defined in Database.Selda.JSON Methods (~>) :: JSONValue a => Col (Inner b) a -> Col (Inner b) Text -> Col (Inner b) (Maybe Value) Source # jsonToText :: Col (Inner b) Value -> Col (Inner b) Text Source #

Orphan instances

ToJSON RowID Source #
Instance details Methods toJSON :: RowID -> Value # toEncoding :: RowID -> Encoding # toJSONList :: [RowID] -> Value # toEncodingList :: [RowID] -> Encoding #
FromJSON RowID Source #
Instance details Methods parseJSON :: Value -> Parser RowID # parseJSONList :: Value -> Parser [RowID] #
SqlType Value Source #
Instance details Methods mkLit :: Value -> Lit Value # sqlType :: Proxy Value -> SqlTypeRep # fromSql :: SqlValue -> Value # defaultValue :: Lit Value #
ToJSON (ID a) Source #
Instance details Methods toJSON :: ID a -> Value # toEncoding :: ID a -> Encoding # toJSONList :: [ID a] -> Value # toEncodingList :: [ID a] -> Encoding #
FromJSON (ID a) Source #
Instance details Methods parseJSON :: Value -> Parser (ID a) # parseJSONList :: Value -> Parser [ID a] #