I'm trying to validate unique question for specific book_id it means is should be unique only specific record.
table: questions
$title = this is question 1
$book_id = 12
TRUE = if question not posted for $book_id = 16, user can post same question.
Display Error = if question posted for $book_id = 12, user not able to post.
This is what I tried so far
"required|unique:questions,question,book_id".$book_id, "required|unique:questions,question,book_id,!".$book_id, "required|unique:questions,question,NULL,id,book_id,".!$book_id,
via Jeff
