Laravel 5.4雄辩关系排序

Question

我有两个数据库表称为交付，并deliverable_version。

交割的hasMany Deliverable_Version。

交付有id列，该模型有一个函数来获取最新版本：

public function getRecentVersion() 
    { 
     $deliverable_version_max = $this->versions()->max('version'); 

     $deliverable_version = DeliverableVersion::where([ 
      'version'=>$deliverable_version_max, 
      'deliverable_ID'=>$this->id, 
     ])->first(); 

     return $deliverable_version; 
    } 

Deliverable_version表有ID，deliverable_ID，标题，消息，截止日期，版本， created_at，updated_at。

如何将执行的操作，我可以：

1. 获取所有交付，并与交付相关的最新版本。

2. 排序交付其所由deliverable_version表（的updated_at）

3. 的列分页的结果？

这是我在它的企图，这是不工作，因为它选择所有的版本时，我加入了表，而不仅仅是最新版本：

$deliverables = Accounts::find($owner_account_ID)->deliverables(); 
    $deliverables = $deliverables->join('deliverable_version', 'deliverable.id', '=', 'deliverable_version.deliverable_ID'); 
    $deliverables = $deliverables->search($search); 
    $deliverables = $deliverables->orderBy('deliverable_version.updated_at', 'desc'); 
    $deliverables = $deliverables->paginate(4); 

任何帮助表示赞赏。谢谢。

Answer 1

in Accounts module add: 

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

in controller: 

    enter code here 

$deliverables = Accounts::find($owner_account_ID)->deliverables()>with('deliverable_version'); 
foreach($deliverables as $deliverable){ 
// last version 
$deliverable = $deliverables->deliverable_version->last(); 

}

Answer 2

in Accounts module add: 

public function deliverable_version(){ 
     return $this->hasMany('App\deliverable_version')->orderBy('update_at'); 
    } 

in controller: 


$deliverables = Accounts::find($owner_account_ID)->deliverables()>with('deliverable_version'); 
foreach($deliverables as $deliverable){ 
// last version 
$deliverable = $deliverables->deliverable_version->last();