[EDIT] Formクラスへフィールドを追加しました。

src/main/java/com/example/demo/app/presentation/form/TransactionForm.java

@@ -23,18 +23,39 @@ public class TransactionForm {
 	private Integer amount;
 
 	private LocalDate transactionDate;
-
+	
-	public static TransactionForm convertFrom(TransactionModel transactionModel) {
+	private String categoryName;
+	
+	private Integer income;
+	
+	private Integer expense;
+	
+	private Integer transactionType;
+	
+	public static TransactionForm convertFrom(TransactionModel transactionModel, String categoryName, int income, int expense, int transactionType) {
 		return new TransactionForm(
 				transactionModel.getTransactionId(),
 				transactionModel.getUserId(),
 				transactionModel.getCategoryId(),
 				transactionModel.getAmount(),
-				transactionModel.getTransactionDate());
+				transactionModel.getTransactionDate(),
+				categoryName,
+				income,
+				expense,
+				transactionType);
 	}
 
-	public static List<TransactionForm> convertFrom(List<TransactionModel> transactionModelList) {
+	public static List<TransactionForm> convertFrom(List<TransactionModel> transactionModelList, String categoryName, int income, int expense, int transactionType ) {
-		return transactionModelList.stream().map(TransactionForm::convertFrom).toList();
+		return transactionModelList.stream().map(transactionModel -> TransactionForm.convertFrom(transactionModel, categoryName, income, expense, transactionType)).toList();
 	}
 
+	public static TransactionModel convertTo(TransactionForm transactionForm) {
+		return new TransactionModel(
+				transactionForm.getTransactionId(),
+				transactionForm.getUserId(),
+				transactionForm.getCategoryId(),
+				transactionForm.getAmount(),
+				transactionForm.getTransactionDate());
+	}
+	
 }