为关系覆盖 grails 域类中的 getter 和 setter [英] Override getter and setter in grails domain class for relation

问题描述

如何覆盖作为 grails 域类中一对多关系的字段的 getter 和 setter?我知道如何覆盖作为单个对象的字段的 getter 和 setter，但我对集合有问题.这是我的情况:

How to override getter and setter for field being a relation one-to-many in grails domain class? I know how to override getters and setters for fields being an single Object, but I have problem with Collections. Here is my case:

我有实体域类，它有很多标题.现在我想覆盖标题的 getter 以仅获取标志 isActive 等于 true 的标题.我试过类似的东西，但它不起作用:

I have Entity domain class, which has many titles. Now I would like to override getter for titles to get only titles with flag isActive equals true. I've tried something like that but it's not working:

class Entity {

    static hasMany = [
        titles: Title
    ]

    public Set<Title> getTitles() {
        if(titles == null)
            return null
        return titles.findAll { r -> r.isActive == true }
    }

    public void setTitles(Set<Title> s) {
        titles = s
    }
}

class Title {
    Boolean isActive

    static belongsTo = [entity:Entity]

    static mapping = {
        isActive column: 'is_active'
        isActive type: 'yes_no'
    }
}

感谢您的帮助.

推荐答案

需要参考Set