grails - Problem with RichUI star rating -

i'm devolping rating system richui plugin grails. first had following code:

class ratingcontroller {  def springsecurityservice  static scaffold = true  def rate = {     def rating = params.rating     def artist = artist.get( params.id )     def currentuser = currentuser()      currentuser.addtoratings(new rating(artist:artist, rating:rating)).save()     render(template: "/artist/rate", model: [artist: artist, rating: rating])      }  private currentuser(){     return user.get(springsecurityservice.principal.id) } } 

which worked fine, problem code that, if user updates rating 1 artist create new rating instance instead of update rating value. came following code:

class ratingcontroller {  def springsecurityservice  static scaffold = true  def rate = {     def rating = params.rating     def artist = artist.get( params.id )     def currentuser = currentuser()      if(! currentuser.ratings.artist.contains(artist)){         currentuser.addtoratings(new rating(artist:artist, rating:rating)).save()         render(template: "/artist/rate", model: [artist: artist, rating: rating])     }      else{         currentuser.ratings.find{it.artist==artist}.rating = rating         currentuser.save()         render(template: "/artist/rate", model: [artist: artist, rating: rating])     } }  private currentuser(){     return user.get(springsecurityservice.principal.id) } } 

but code, when rating value assigned new rating (params.rating) in "else" block, assigned random number around 50's (like 53). can not see problem. little appreciated. much.

i found out problem was. had convert input value of rating type double. so, following code working supposed to:

class ratingcontroller {      def springsecurityservice      static scaffold = true      def rate = {         def rating = params.rating.todouble()         def artist = artist.get( params.id )         def currentuser = currentuser()          if(! currentuser.ratings.artist.contains(artist)){            currentuser.addtoratings(new rating(artist:artist, rating:rating)).save()            render(template: "/artist/rate", model: [artist: artist, rating: rating])         }          else{            currentuser.ratings.find{it.artist==artist}.rating = rating            currentuser.save()            render(template: "/artist/rate", model: [artist: artist, rating: rating])         }    }     private currentuser(){         return user.get(springsecurityservice.principal.id)    }    }