Converting List String to just a String or another option to give criteria for a view

Converting List String to just a String or another option to give criteria for a view

Dear ZOHO and Creator developers,

I'm having a really hard time to convert a set of elements in a list string to just a string. I need this so I can search in that string.

The situation is that I want to develop criteria for a view in which the users sees the records that he himself has created, as well as the records that another user has created. They both (or more of them) have in common that they share the same Group (in the group defenition, their respecitve zoho.userid's are stored.

Please help me to develop such function.

As a sidestep. I need this badly, because it turned out that if someone wants to perform a search in a view (using the built-in search option), and the user cancels this search,
  •  all records in the system are visible, if no criteria that the email of the developer is the zoho.loginuserid mail is given
  • only the records of the user are visible if the criterium that a user can only sees his own records via zoho.loginuserid, BUT not the records developed by the other users in his group.
Kind regards for the help.

Silvester