dougong7850 2018-07-03 23:17
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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

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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?
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