通过数据计算laravel

Question

这里我想添加我基于id_data kos的数据，所以每当我添加数据时都会自动计算id_data_kos。

这里我的控制器：

$limit = 10; 
     $result = DB::table('residents') 
     ->join("data_kos","data_kos.id","=","residents.id_data_kos") 
     ->select("residents.*","data_kos.title as data_title") 
     ->groupBy('id_data_kos') 
     ->orderBy('residents.id', 'asc'); 

$data['posts'] = $result->paginate($limit); 

，这我的观点：

@foreach($posts as $row) 
<td>{{ $row->data_title }}</td> 
<td>here i want to count</td> 
@endforeach 

这是我的表：

Answer 1

试试这个

$limit = 10; 
     $result = DB::table('residents') 
     ->join("data_kos","data_kos.id","=","residents.id_data_kos") 
     ->select("residents.*","data_kos.title as data_title", DB::raw('COUNT(id_data_kos) as count')) 
     ->groupBy('id_data_kos') 
     ->orderBy('residents.id', 'asc'); 

$data['posts'] = $result->paginate($limit); 

的id_data_kos计数将返回为count