Php 调用模型[App\Models\Employee]上未定义的关系[title]

使用Laravel 9，在我的应用程序中，头衔和工资之间存在一对多与员工模型的关系. 员工模型

public function titles(): HasMany
    {
        return $this->hasMany(Title::class, 'emp_id');
    }

    public function salaries(): HasMany
    {
        return $this->hasMany(Salary::class, 'emp_id');
    }

薪酬模式

 public function employee(): BelongsTo
    {
        return $this->belongsTo(Employee::class, 'emp_no');
    }

职称模型

public function employee(): BelongsTo
    {
        return $this->belongsTo(Employee::class, 'emp_no');
    }

现在我将使用EmployeeController getEmployee函数以及EmployeeController.php来获取所有数据

use Illuminate\Http\Request;
use App\Models\Employee;
use App\Models\Title;
use App\Models\Salary;


class EmployeeController extends Controller
{
    public function getEmployee() {
        return response()->json(Employee::with('title','salary')->get(), 200);
      
    }
}

我的api.php调用如下所示

Route::get('employees','App\Http\Controllers\EmployeeController@getEmployee');

但在错误消息之后也会显示结果 Illuminate\Database\Eloquent\RelationNotFoundException: Call to undefined relationship [title] on model [App\Models\Employee]. in file 个 那我怎么才能解决这个问题呢？