Php Laravel、多个belongsto和自动插入ID？

你好，我想在线路板中插入一个子板，但此子板属于用户和线路板，我正在尝试自动插入线路板id和用户id，但线路板id无效这是我的代码：

Subboard.php

<?php

namespace App;

use App\Thread;
use App\User;
use App\Board;
use Illuminate\Database\Eloquent\Model;

class Subboard extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = ['subboaName'];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'useId' => 'int',
        'boaId' => 'int',
    ];

    /**
     * Obtenemos los threads del board.
     *
     * @return los threads dentro de ese board.
     */
    public function thread()
    {
        return $this->hasMany(Thread::class);
    }

    public function user()
    {
        return $this->belongsTo(User::class, 'useId');
    }

    public function board()
    {
        return $this->belongsTo(Board::class, 'boaId');
    }
}

Subboards.blade.php（我们插入的表单）

{！！csrf_field（）！！}
@foreach（$board作为$board）
{{$board->boaName}
@endforeach
@如果（$errors->has（'boaId'））

错误：
{{$errors->first（'boaId'）}

@恩迪夫
@如果（$errors->has（'subboaName'））

错误：
{{$errors->first（'subboaName'）}

@恩迪夫
阿尼亚迪尔

将文件名添加到

$filleble

属性中

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

                                        <form class="form col-md-12 center-block" role="form" method="POST" action="{{ url('/administrar/subsecciones') }}">
                                            {!! csrf_field() !!}

                                            <div class="form-group{{ $errors->has('selectboa') ? ' has-error' : '' }}">
                                                <select name="boaId" class="form-control input-lg selectpicker" data-live-search="true" title="Selecciona sección" data-style="input-lg btn-default">
                                                    @foreach ($boards as $board)
                                                        <option value="{{$board->id}}">{{$board->boaName}}</option>
                                                    @endforeach
                                                </select>
                                                @if ($errors->has('boaId'))
                                                    <p class="help-block">
                                                        <div class="alert alert-danger" role="alert">
                                                          <span class="glyphicon glyphicon-exclamation-sign" aria-hidden="true"></span>
                                                          <span class="sr-only">Error:</span>
                                                          {{ $errors->first('boaId') }}
                                                        </div>
                                                    </p>
                                                @endif
                                            </div>

                                            <div class="form-group{{ $errors->has('subboaName') ? ' has-error' : '' }}">
                                                <input type="text" class="form-control input-lg" placeholder="Nombre de la subsección" name="subboaName" value="{{ old('subboaName') }}">
                                                @if ($errors->has('subboaName'))
                                                    <p class="help-block">
                                                        <div class="alert alert-danger" role="alert">
                                                          <span class="glyphicon glyphicon-exclamation-sign" aria-hidden="true"></span>
                                                          <span class="sr-only">Error:</span>
                                                          {{ $errors->first('subboaName') }}
                                                        </div>
                                                    </p>
                                                @endif
                                            </div>
                                            <div class="form-group">
                                                <button type="submit" class="btn btn-default btn-lg btn-block">
                                                    Añadir
                                                </button>
                                            </div>
                                        </form>

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