how to use session in grails

Question

I am new to grails. And I have to work with session. I have seen the session documentation. But no idea where to put the code in my controller. I have a page for student creatio

Answer 1

You could use the session.getAttribute(key) and session.setAttribute(key, value) methods inside your controller. Alternatively, there are plugins such as the Spring Security Core Plugin that already handle this very well.

There's a good tutorial by Peter Ledbrook for the Spring Security plugin here and the plugin documentation links to at least one other tutorial.

** Edit **

As you suggested, in order to use the session directly the user would need to be set in the session at an earlier point. For example:

def setCurrentStudent() {
    def aStudent = [name: "Student1"]
    session["user"] = aStudent
    render "Added $aStudent to the session."
}

Spring Security will do this automatically at login. Then, the current user can then be accessed at any time using the springSecurityService.

class SomeController {
   def springSecurityService
   def someAction = {
       def user = springSecurityService.currentUser
       …
   }
}