RichUI的問題star rating

Question

我使用RichUI插件爲Grails開發了一個評分系統。首先，我有以下代碼：

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) 
} 
} 

它工作得很好，但是這個代碼的問題是，如果用戶更新的等級爲一個藝術家它總是創建一個新的評級實例，而不是隻更新評級值。 於是我想出了下面的代碼：

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) 
} 
} 

但有了這個代碼，當評價值被分配到「其他」塊新的等級（params.rating），它被分配給一些隨機數量在50左右（如53）。我看不出問題在哪裏。 有一點幫助，將不勝感激。 非常感謝。

Answer 1

我剛剛發現問題出在哪裏。我必須將評分的輸入值轉換爲double類型。所以，下面的代碼工作，因爲它本來是：

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) 
    } 
    }