Laravels雄辯許多存儲一對多的關係

Question

我有3個表

-- networks 
    Schema::create('networks', function(Blueprint $table) 
     { 
      $table->engine = 'InnoDB'; 

      $table->increments('id'); 
      $table->string('network'); 
      $table->string('description',255); 
      $table->string('attributes',255); 
      $table->timestamps(); 

     }); 

和

-- campaigns 

Schema::create('campaigns', function($table) { 
       $table->engine = 'InnoDB'; 
       $table->increments('id'); 
       $table->string('campaign_title'); 
       $table->integer('owner')->unsigned(); 
       $table->string('details'); 
       $table->timestamps(); 
      }); 

      Schema::table('campaigns', function($table) { 
       $table->foreign('owner')->references('id')->on('users')->onDelete('cascade'); 
      }); 

和 - campaign_networks_relationhsips

Schema::table('campaign_networks_relationhsips', function($table) 
    { 
     $table->foreign('campaign_id')->references('id')->on('campaigns')->onDelete('cascade'); 
     $table->foreign('network_id')->references('id')->on('networks')->onDelete('cascade'); 
    }); 

在新建立廣告活動，形式我將可用網絡顯示爲複選框。

用戶給出了該活動的標題，並將所需網絡廣告並保存。

問題：

具有雄辯這將直接拉動這個關係到綁定表（campaign_networks_relationhsips）的方法或我必須做2個查詢，如節約活動和獲取活動我的ID後在網絡上使用循環將這種關係保存在綁定表中。

例如

創建活動：給我回ID：1個 選用網絡3,4-

比環和保存

1-3 
1-4 

in campaign_networks_relationhsips 

比我嘗試以下

<?php namespace Td\Reports\Controllers\Backend; 

use Td\Reports\Campaigns\CampaignsInterface; 
use Input, 
    Redirect, 
    View, 
    App, 
    Str; 
use Illuminate\Support\MessageBag; 
class CampaignsController extends ObjectBaseAdminController { 

    /** 
    * The place to find the views/URL keys for this controller 
    * @var string 
    */ 
    protected $view_key = 'admin.campaigns'; 

    protected $networks; 

    /** 
    * Construct 
    */ 
    public function __construct(CampaignsInterface $campaigns) { 
     $this->model = $campaigns; 
     $networks = App::make('Td\Reports\Networks\NetworksInterface'); 
     $this->networks = $networks->getAll(); 
     parent::__construct(); 
    } 

    public function postNew() { 


     $record = $this->model->getNew(Input::all()); 
     //$record->campaign_title= Input::get('campaign_title'); 

     $valid = $this->validateWithInput === true ? $record->isValid(Input::all()) : $record->isValid(); 

     if (!$valid) 
      return Redirect::to('admin/' . $this->new_url)->with('errors', $record->getErrors())->withInput(); 

     // Run the hydration method that populates anything else that is required/runs any other 
     // model interactions and save it. 
     $record->save(); 

     $record->networks()->sync([3,4]); 

     return Redirect::to($this->object_url)->with('success', new MessageBag(array('Item Created'))); 
    } 


} 

比我擁有廣告系列的存儲庫

<?php 

namespace Td\Reports\Campaigns; 

use Td\Reports\Core\EloquentBaseRepository; 
use Td\Reports\Abstracts\Traits\NetworkableRepository; 
use Datatables,Sentry; 

class CampaignsRepository extends EloquentBaseRepository implements CampaignsInterface { 


    /** 
    * Construct 
    * @param Campaigns $campaigns 
    */ 
    public function __construct(Campaigns $campaigns) { 
     $this->model = $campaigns; 


    public function getAll() { 

     if (Sentry::getUser()->hasAnyAccess(['system'])) { 
      return $this->model->get(); 
     } else { 
      return $this->model->where('owner', Sentry::getUser()->id)->get(); 
     } 
    } 

    public function networks() 
    { 
     return $this->belongsToMany('Network', 'campaign_networks_relationhsips'); 
    } 

} 

Answer 1

一個必須供您閱讀：http://laravel.com/docs/eloquent#relationships

從你寫什麼，我想你要保存的模型和它的支點關係，所以這裏有雲：

// basic example flow in a controller, repo or wherever you like 
$campaign = new Campaign; 
$campaign->name = Input::get('name'); 
// assign more campaign attributes 
$campaign->save(); 

$campaign->networks()->sync([3,4]); // 3,4 are existing network rows ids 

這就是全部。對於上述工作，你需要設置這些關係：

// Campaign model 
public function networks() 
{ 
    return $this->belongsToMany('Network', 'campaign_networks_relationhsips'); 
} 

// Network model 
public function campaings() 
{ 
    return $this->belongsToMany('Campaign', 'campaign_networks_relationhsips'); 
}