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I have two tables, "teachers" & "teacher_certificates" which keep teachers certificates.

I'm trying to save teachers certificates by eloquent relationship like here https://laravel.com/docs/5.7/eloquent-relationships#the-create-method

Teacher Model:

namespace AppModelsTeachers;

use AppUser;
use IlluminateDatabaseEloquentModel;
use IlluminateDatabaseEloquentRelationsRelation;
use IlluminateDatabaseEloquentSoftDeletes;

 class Teacher extends Model
 
 public function Certificates()
 
 return $this->hasMany(TeacherCertificates::class, 'teacher_id');
 
 
}

TeacherCertificate Model:

namespace AppModelsTeachers;

use AppUser;
use IlluminateDatabaseEloquentModel;

class TeacherCertificates extends Model

 protected $table='teacher_certificates';
 protected $fillable=['teacher_id','certificate'];
 protected $touches=[Teacher::class];
 public $timestamps=false;

And the controller:

namespace AppHttpControllersDashboard;

use AppHttpControllersController;
use AppModelsTeachersExperiences;
use AppModelsTeachersSkills;
use AppModelsTeachersTeacher;
use AppModelsTeachersTeacherCertificates;
use AppUser;
use IlluminateHttpRequest;
use AppHttpRequestsTeacherCreateRequest;
use IlluminateSupportFacadesDB; 

class TeacherController extends Controller
 

 public function store(TeacherCreateRequest $request)
 
 DB::transaction(function () use ($request) 
 $data = $request->all();
 $user = User::create($data);
 $data[ 'user_id']=$user->id;

 $teacher = Teacher::create($data);



 //certificates
 $certificates=array_map(
 function ($certificate) use ($teacher) 
 return ['teacher_id' => $teacher->id,
 'certificate' => $certificate];
 , explode('n', $request->certifications));


 $teacher->Certificates()->createMany($certificates);
 
 
 

I'm getting this error:

BadMethodCallException
Method IlluminateDatabaseQueryBuilder::AppModelsTeachersTeacher does not exist.

The problem resides in definition of $touches property of Teacher class, Which should be name of a method in your class.

For more info read Laravel's Doc