Fix mapper + DTO

src/main/java/com/faf223/expensetrackerfaf/service/ExpenseService.java

@@ -1,25 +1,36 @@
 package com.faf223.expensetrackerfaf.service;
 
 import com.faf223.expensetrackerfaf.model.Expense;
+import com.faf223.expensetrackerfaf.model.User;
 import com.faf223.expensetrackerfaf.repository.ExpenseRepository;
+import com.faf223.expensetrackerfaf.repository.UserRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Optional;
 
 @Service
 @RequiredArgsConstructor
 public class ExpenseService {
 
     private final ExpenseRepository expenseRepository;
+    private final UserRepository userRepository;
 
     public void createOrUpdateExpense(Expense expense) {
         expenseRepository.save(expense);
     }
 
     public List<Expense> getExpensesByUserId(String userUuid) {
-        return expenseRepository.findByUserUuid(userUuid);
+
+        Optional<User> user = userRepository.getUserByUserUuid(userUuid);
+        if (user.isPresent()) {
+            return expenseRepository.findByUser(user.get());
+        }
+
+        return new ArrayList<>();
     }
 
     public List<Expense> getExpenses() {