$this->id, 'total_purchase_amount' => $this->total_purchase_amount, 'total_subsidy' => $this->total_subsidy, 'total_amount' => $this->total_amount, 'fee' => $this->fee, 'start_date' => $this->start_at->rawFormat('Y/m/d'), 'end_date' => $this->end_at->rawFormat('Y/m/d'), ]; } }