覆盖grails域类中的getter和setter以获取关系 [英] Override getter and setter in grails domain class for relation

问题描述

如何重写getter和setter作为grails领域类中的一对多关系的字段？我知道如何覆盖作为单个对象的字段的getters和setter，但我对Collections有问题。这是我的情况：

我有Entity域类，它有很多标题。现在我想重写标题的getter以获得只有标志isActive等于true的标题。我试过类似的东西，但它不起作用：

  class实体{
 
 static hasMany = [
标题：标题
] 
 
公共设置<标题> getTitles（）{
 if（titles == null）
 return null 
 return titles.findAll {r  - > r.isActive == true} 
} 
 
 public void setTitles（Set< Title> s）{
 titles = s 
} 
} 
 
类标题{
布尔isActive 
 
静态belongsTo = [实体：实体] 
 
静态映射= {
 isActive列： 'is_active'
 isActive type：'yes_no'
} 
} 
  

<

解决方案

需要参考 Set< Title> title 。

  class实体{
 Set< Title> title 
 
 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 
} 
} 
  




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:

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'
    }
}

Thank You for your help.

解决方案

Need the reference Set<Title> titles.

class Entity {
    Set<Title> titles

    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
    }
}

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