dougong7850 2018-07-03 23:17
浏览 211
已采纳

从Laravel中的单个hasManyThrough的多个关系转移

I currently have 3 classes Elements, PageElements and Page. The Models are below:

Pages.php

class Pages extends Model
{

    public function pageElement() {
        return $this->hasMany(PageElements::class, 'page_id');
    }
}

PageElements.php

class PageElements extends Model
{
    public function element() {
        return $this->hasOne(Elements::class, 'id', 'element_id');
    }
}

Elements.php

class Elements extends Model
{
    //
}

All the data I need is from Elements, I can throw the PageElements data away, how can I convert this to use a hasManyThrough relationship?

I would like to directly access the Elements via $page->elements, currently I have to do $page->elements->element.

Am I right in thinking this should be a hasManyThrough relationship?

My current attempt is below

public function elements() {
    return $this->hasManyThrough(Elements::class, PageElements::class, 'element_id', 'id', 'id', 'page_id');
}

Though is always returns an empty dataset

  • 写回答

1条回答 默认 最新

  • douba8758 2018-07-04 08:02
    关注

    It seems I did indeed have the keys mixed up as Jonas mentioned, but just not in that order. My relationship was pairing based off of the wrong id's. The following is correct

    public function elements() {
        return $this->hasManyThrough(Elements::class, PageElements::class, 'page_id', 'id', 'id', 'element_id');
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 乌班图ip地址配置及远程SSH
  • ¥15 怎么让点阵屏显示静态爱心,用keiluVision5写出让点阵屏显示静态爱心的代码,越快越好
  • ¥15 PSPICE制作一个加法器
  • ¥15 javaweb项目无法正常跳转
  • ¥15 VMBox虚拟机无法访问
  • ¥15 skd显示找不到头文件
  • ¥15 机器视觉中图片中长度与真实长度的关系
  • ¥15 fastreport table 怎么只让每页的最下面和最顶部有横线
  • ¥15 java 的protected权限 ,问题在注释里
  • ¥15 这个是哪里有问题啊?