问Haskell Persistent BackendFilter

EN

-- | Implements the `match` operator. This operator is specific to Sqlite3 and
--   is used to look for keywords in FTS3/4/5 tables.
match :: EntityField record Text    -- ^ Field to filter on
      -> Text                       -- ^ Text to compare with
      -> Filter record              -- ^ Resulting filter
match field val = Filter field (Left val) (BackendSpecificFilter "match")

SELECT *
FROM   tablename
WHERE  tablename MATCH "hello";

mkPersist persistSettings [persist|
    User
        forename String
        surname String
        bio String
|]

users <- runDB $ selectList [ User `matchAll` searchedTerms ] []