hasOne(Client::class, 'id', 'client_id'); } public function careMonth() { return $this->hasOne(CareMonth::class, 'id', 'care_month_id'); } public function clientBDTMeasurement() { return $this->hasOne(ClientBDTMeasurement::class, 'id', 'client_bdt_measurement_id'); } public function childMeasurements() { return Measurement::where('parent_measurement_id', $this->id) ->where('is_active', true) ->get(); } }