Question

我正在使用laravel背包来构建一个后台管理，并且我坚持这一点，这可能是一个非常基本的疑问。

我遇到的情况是：

表格事件：

id - name - themeID - 更多字段......

表主题

id - name

所以，一个主题可以有各种各样的事件，一个事件可以有各种主题，我对如何实现这一点有所怀疑，我做了什么：

Theme.php

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! CustomTableViewCell
    let task = toDolist[indexPath.row]
    cell.task = task
    return cell
}

Event.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Backpack\CRUD\CrudTrait;

class Theme extends Model
{
    use CrudTrait;

     /*
    |--------------------------------------------------------------------------
    | GLOBAL VARIABLES
    |--------------------------------------------------------------------------
    */

    protected $table = 'themes';
    //protected $primaryKey = 'id';
    // public $timestamps = false;
    // protected $guarded = ['id'];
    protected $fillable = ['name'];
    // protected $hidden = [];
    // protected $dates = [];

    /*
    |--------------------------------------------------------------------------
    | FUNCTIONS
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | RELATIONS
    |--------------------------------------------------------------------------
    */

    public function Theme() {
      return $this->hasMany('App\Models\Event');
    }

    /*
    |--------------------------------------------------------------------------
    | SCOPES
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | ACCESORS
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | MUTATORS
    |--------------------------------------------------------------------------
    */
}

EventCrudController.php

    <?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Backpack\CRUD\CrudTrait;

class Event extends Model
{
    use CrudTrait;

     /*
    |--------------------------------------------------------------------------
    | GLOBAL VARIABLES
    |--------------------------------------------------------------------------
    */

    protected $table = 'events';
    //protected $primaryKey = 'id';
    // public $timestamps = false;
    // protected $guarded = ['id'];
    protected $fillable = ['name','theme','schedules','themeID','countyID','event_typeID','offered_conditionID','alone_with_typeID','tagID',
    'advertiserID','event_languageID','special_priceID','start_date','end_date','price','photos','space_name','address','description','facebook_url',
    'external_url1','featured_image','available_vacancies','gps_coordinates','external_url2','featured','status','start_featured_date','end_featured_date'];

    // protected $hidden = [];
    // protected $dates = [];

    /*
    |--------------------------------------------------------------------------
    | FUNCTIONS
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | RELATIONS
    |--------------------------------------------------------------------------
    */

    public function Event() {
        return $this->hasOne('App\Models\EventSubType');
        return $this->hasMany('App\Models\SpecialPrice');
        return $this->hasMany('App\Models\PriceTypes');
        return $this->hasMany('App\Models\Tag');
        // return $this->hasMany('App\Models\County');
        return $this->hasMany('App\Models\County');
        return $this->hasMany('App\Models\EventHasSpecialPrice');
    }

    public function themes()
    {
        return $this->belongsToMany('App\Models\Theme');
    }

    /*
    |--------------------------------------------------------------------------
    | SCOPES
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | ACCESORS
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | MUTATORS
    |--------------------------------------------------------------------------
    */
}

我需要一个数据透视表吗？我错过了什么？我找不到这方面的文件。

我得到的错误如下：

数组到字符串转换，他试图保存在字段数组上（＆＃39; 1＆＃39;，＆＃39; 2＆＃39;）并且错误发生在那里。

Answer 1

正如@tabacitu所解释的，您的关系是错误的。您正确地选择了其中之一，但是每个关系都应像下面这样定义，而不是像您那样在construct方法上定义：

public function themes()
{
    return $this->belongsToMany('App\Models\Theme');
}

您可以阅读有关Eloquent Relationship的Laravel文档，找到所需的所有信息。

设置完成后，就可以进行这项工作

$this->crud->addFields([
      // This is the field im trying to get working
      [
          'label' => 'Theme',
          'type' => 'select_multiple',
          'name' => 'themeID',
          'entity'=> 'themes', // <-- this is the relation method name
          'attribute' => 'name', // Column which user see in select box
          'model' => 'App\Models\Theme' // Model which contain FK
      ],

Laravel背包的关系让人怀疑

1 个答案: