Question

在laravel5中，我属于

模型中的模型

 public function LeaveCategories()
{
    return $this->belongsTo('App\LeaveCategories','leave_category_id','id');
}

然后我在

的控制器中查询

$userInfo = Leave::select(DB::raw('count(leaves.leave_category_id) as category_used'),
        'LeaveCategories.id','LeaveCategories.category','LeaveCategories.category_num')
        ->where('Leaves.leave_date','>=', $first_day_this_year)
        ->where('Leaves.leave_date','<=', $last_day_this_year)
        ->where('Leaves.leave_status', 1)
        ->groupBy('Leaves.leave_category_id','LeaveCategories.category','LeaveCategories.category_num','LeaveCategories.id')
        ->get();

但是它显示的错误是未知列＆＃39; LeaveCategories.id＆＃39;在＆＃39;字段列表＆＃39;

Answer 1

您使用QueryBuilder，但belongsTo是ActiveRecord。使用：

$userInfo = Leave::with('LeaveCategories')->where('Leaves.leave_date','>=', $first_day_this_year)
        ->where('Leaves.leave_date','<=', $last_day_this_year)
        ->where('Leaves.leave_status', 1)
        ->groupBy('Leaves.leave_category_id','LeaveCategories.category','LeaveCategories.category_num','LeaveCategories.id')
        ->get([DB::raw('count(leaves.leave_category_id) as category_used'),
        'LeaveCategories.id','LeaveCategories.category','LeaveCategories.category_num']);

如何在选择中使用Belongs表

1 个答案: