guys i got a little projet and i need to extrat de ID of the user from the Session.
I can't put it in a Text/Int because it says that the Session carry an Key (Sql Key i think) how can i converte it to Int to use in other methods from my project
I Tried to do it to recover the ID from session
getInicioR :: Handler Html
getInicioR = do
uid <- lookupSession "_ID"
user <- runDB $ get404 uid
Shows the follow error message:
Couldn't match expected type ‘Key t0’ with actual type ‘Maybe Text’
In the first argument of ‘get404’, namely ‘uid’
In the second argument of ‘($)’, namely ‘get404 uid’
Use keyToValues to get a list of PersistValue values.
keyToValues :: Key record -> [PersistValue]
If you know, for instance, that the key is a Text value, then your list will consist of a single PersistText value and you could proceed like this:
do uid <- lookupSession "_ID"
let pvals = keyToValues uid
[ PersistText txt ] = pvals
liftIO $ print pvals -- to see what pvals is
-- now txt is a Text value
...