Php 一对多关系与Elount with laravel框架

我有一个叫做Catparent的模型和另一个叫做Category的模型

class Category extends Model
{
    public function catparent() {
        return $this->belongsTo('App\Catparent','parent_id','id');
    }
}
class Catparent extends Model
{

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'status',
    ];

    public function category() {
        return $this->hasMany('App\Category');
    }
}

>>> $cat = App\Catparent::find(1);
=> App\Catparent {#628
     id: 1,
     name: "Electronics",
     active: "Inactive",
     created_at: "2017-03-19 12:43:10",
     updated_at: "2017-03-19 12:43:10",
   }

    >>> $cat->category;
    Illuminate\Database\QueryException with message 'SQLSTATE[42S22]: Column not found: 1054 Unknown column 'categories.catparent_id' in 'where clause' (SQL: select * from `categories` where `categories`.`catparent_id` = 1 and `categories`.`catparent_id` is not null)'
    >>>

Eloquent正在查找catparent_id，而Categories表将parent_id列作为catparent表的外键

我已经通过hasMany（）方法中的一个参数传递了这一点，但仍然雄辩地寻找catparent_id而不是parent_id

---

关于这一点，我有什么遗漏吗？

return$this->hasMany（'App\Category'，'parent\u id'）您需要在关系的两侧指定外键。谢谢，它起作用了