(int) ($this->resource['id'] ?? 0), 'parent_id' => (int) ($this->resource['parent_id'] ?? 0), 'invoice_id' => isset($this->resource['invoice_id']) ? (int) $this->resource['invoice_id'] : null, 'total_amount' => (float) ($this->resource['total_amount'] ?? 0), 'paid_amount' => (float) ($this->resource['paid_amount'] ?? 0), 'balance' => (float) ($this->resource['balance'] ?? 0), 'number_of_installments' => (int) ($this->resource['number_of_installments'] ?? 0), 'transaction_id' => $this->resource['transaction_id'] ?? null, 'payment_method' => $this->resource['payment_method'] ?? null, 'payment_date' => $this->resource['payment_date'] ?? null, 'status' => $this->resource['status'] ?? null, 'semester' => $this->resource['semester'] ?? null, 'school_year' => $this->resource['school_year'] ?? null, 'created_at' => $this->resource['created_at'] ?? null, 'updated_at' => $this->resource['updated_at'] ?? null, ]; } }