validation - 具有一对多的未保存域类以随机顺序返回子对象

Question

因此，情况如下:

我有课例如:

    class Author {
       String name

       static hasMany = [books: Book]
       static mapping = {
         books cascade: "all-delete-orphan"
       }
    }

    class Book {
       String text

       static belongsTo = [author: Author]

       static constraints = {
         text minSize: 500
       }
   }

现在，我为此创建了一个表单，当我尝试验证时，该人没有输入至少500个字符的文本，因此我将对象返回到表单。

问题是我创建的订单中未归还 child 对象!!!你们如何验证从未保存过的域类的子对象？

谢谢!

Answer 1

试试这个

class Author {
   String name
   ArrayList<Book> books = []
   static hasMany = [books: Book]
   static mapping = {
     books cascade: "all-delete-orphan"
   }
}

如果不行，我认为您必须按某个 Realm 订购

您可以这样指定排序顺序

class Author {
   String name

   static hasMany = [books: Book]
   static mapping = {
     books cascade: "all-delete-orphan"
     books sort: 'id', order: 'desc'
   }

}