Question

欢迎！我在数据库备注和飞行员中有两张桌子，我想显示属于飞行员的笔记。我在notes表中添加了外键，但是当我尝试创建新注释时我遇到了这样的问题：

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`app`.`notes`, CONSTRAINT `notes_pilot_id_foreign` FOREIGN KEY (`pilot_id`) REFERENCES `pilots` (`id`))

注意型号：

 class Note extends Model
    {
      protected $table = 'notes';
        /**
         * The attributes that are mass assignable.
         *
         * @var array
         */
        protected $fillable = [
            'data', 'zadanie', 'uwagi', 'pilot_id',
        ];

        public function pilot() {
          return $this->belongsTo(Pilot::class);
        }
    }

试点模式：

class Pilot extends Model
{
  protected $table = 'pilots';
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'phone', 'email',
    ];

    public function note() {
      return $this->hasMany(Note::class);
    }
}

注意控制器存储方法：

public function store(Request $request)

{

    $this->validate($request, [

        'data' => 'required',

        'zadanie' => 'required',

        'uwagi' => 'required',

    ]);


    $note = new Note (array(
      'data' => $request->get('data'),
      'zadanie' => $request->get('zadanie'),
      'uwagi' => $request->get('uwagi'),

    ));
    $note->save();
    $note->pilot()->sync($request->get('pilots'));

    return redirect()->route('uwagi.index')

                    ->with('success','Uwagi dodane poprawnie');

}

Answer 1

试试这个返回$ this-＆gt; hasMany（＆＃39; App \ Note＆＃39;）; 和试试这个返回$ this-＆gt; belongsTo（＆＃39; App \ Pilot＆＃39;）;

Answer 2

问题解决了。我只是没有在迁移中删除公钥中的外键。

laravel - 使用外键查询

2 个答案: