belongsTo (Directorat::class); } public function sub_directorat() { return $this->belongsTo (SubDirectorat::class); } public function job() { return $this->belongsTo (Job::class); } public function sub_job() { return $this->belongsTo (SubJob::class); } public function sub_sub_job() { return $this->belongsTo (SubSubJob::class); } public function special_code() { return $this->belongsTo (SpecialCode::class); } public function document_details() { return $this->hasMany (DocumentDetail::class); } }