Laravel 关系不是 ID 的

Question

我有几个这样的表：

作者表 - ID - book_id - 名称

图书桌 - ID - 参考 - 作者 - 标题

books 表上的 ref 与 authors 表上的 book_id 相同，但在我看来，我似乎无法通过这样做来获取作者的书：

{{ $author->books->first()->title }}

我的作者和书籍模型如下所示：

class Authors extends \Eloquent {

protected $guarded = ['id'];

public $table = 'authors';

public $timestamps = false;

public function books()
{
    return $this->hasMany('Books', "author","name");
}

 }


 class Books extends \Eloquent {

protected $guarded = ['id'];

public $timestamps = false;

public function author()
{
    return $this->hasOne('Authors');
}

public function categories(){
    return $this->hasMany('Categories');
}

}

真的需要一些帮助。

Answer 1

您可以在hasMany 中传递外键和本地键，但看起来您将author 作为外键传递，name 作为本地键传递。外键应该是ref，本地键应该是book_id。

class Authors extends \Eloquent {

    protected $guarded = ['id'];

    public $table = 'authors';

    public $timestamps = false;

    public function books()
    {
        return $this->hasMany('Books', "ref", "book_id");
    }

}


class Books extends \Eloquent {

    protected $guarded = ['id'];

    public $timestamps = false;

    public function author()
    {
        return $this->hasOne('Authors');
    }

    public function categories(){
        return $this->hasMany('Categories');
    }

}