Facing error for importing _String from Data.Aeson.Lens

Question

import Data.Aeson.Lens (_String,key)
postRetweet1 tweetId = do
    tweetId >>= \tweetId1 -> (CM.foldM (\arr tid ->  ((try (postWith authenticate (retweetUrl++tid++".json") (DB.pack "ABC")) ):: IO (Either SomeException (Response BL.ByteString)) ) >>= 
         \sc ->
                case sc of
                    Right val ->   if (val ^. responseStatus ^. statusCode)==200
                                        then pure (arr++[val ^. responseBody . key "text" . _String ])  
                                    else pure (arr)     


                Left x -> pure (arr) ) [] tweetId1 )

this is the error im getting

Module ‘Data.Aeson.Lens’ does not export ‘_String’

i had referred this http://www.serpentine.com/wreq/tutorial.html

Answer 1

You need to use lens-aeson package for _String

https://hackage.haskell.org/package/lens-aeson-1.0.2/docs/Data-Aeson-Lens.html