belongsToMany(Role::class, 'role_site_projects'); } public function province() { return $this->belongsTo(Province::class); } public function city() { return $this->belongsTo(City::class); } public function subdistrict() { return $this->belongsTo(Subdistrict::class); } public function cityBranch() { return $this->belongsTo(CityBranch::class); } public function cityCenter() { return $this->belongsTo(CityCenter::class); } public function subdistrictCenter() { return $this->belongsTo(SubdistrictCenter::class); } }