Laravel - 如何查询 Eloquent 关系？

Question

我在 Laravel-5.8 中有这个模型：

class Employee extends Model
{
    public $timestamps = false;
    protected $table = 'employees';
    protected $primaryKey = 'id';

    protected $fillable = [
                  'id',
                  'first_name',
                  'last_name',
                  'hr_status',      
                  'employee_type_id',
              ];

    public function employeetype()
    {
        return $this->belongsTo('App\Models\Hr\EmployeeType','employee_type_id','id');
    }           
}


class EmployeeType extends Model
{
    public $timestamps = false;
    protected $table = 'employee_types';
    protected $primaryKey = 'id';

    protected $fillable = [
                  'type_name',
                  'is_active',
              ];
}

然后我在员工 controller function 中有这个查询：

 $unsubmitted = Employee::where('hr_status', 0)->get();

如何将employee_types中的is_active = 1包含在Employee中的查询中：

$unsubmitted = Employee::where('hr_status', 0)->get();

Answer 1

您正在寻找whereHas方法，查询是否存在关系：

Employee::where('hr_status', 0)
    ->whereHas('employeetype', function ($q) {
        $q->where('is_active', 1);
    })->get();

Laravel 5.8 Docs - Eloquent - 关系 - 查询关系存在whereHas